image imagewidth (px) 53 760 ⌀ | question stringlengths 14 862 | choices listlengths 2 5 | answer int8 0 4 | hint stringlengths 0 1.85k | task stringclasses 3
values | grade stringclasses 12
values | subject stringclasses 3
values | topic stringclasses 26
values | category stringclasses 119
values | skill stringclasses 321
values | lecture stringclasses 256
values | solution stringlengths 0 2.72k |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Which part of the lettuce plant do we usually eat? | [
"the leaves",
"the flowers",
"the root"
] | 0 | People use lettuce plants for food. Photosynthesis makes food for the plant. We usually eat the part of the plant that does most of the photosynthesis. | closed choice | grade4 | natural science | biology | Plants | Classify fruits and vegetables as plant parts | The fruits and vegetables we eat are parts of plants! Plants are made up of different structures. The different structures carry out important functions.
The roots take in water and nutrients from the soil. They also hold the plant in place in the soil.
The stem supports the plant. It carries food, water, and nutrients... | The part of the lettuce plant we usually eat is the leaves. They do most of the photosynthesis to make food for the plant. | |
Not supported with pagination yet | Complete the sentence.
In this chemical reaction, hydrogen is a (). | [
"product",
"reactant"
] | 0 | This passage describes a chemical reaction. Read the passage. Then, follow the instructions below.
Like people on Earth, astronauts living on the International Space Station need oxygen to survive. Since there is no oxygen in space for the astronauts to breathe, they make oxygen using a process called electrolysis. Thi... | closed choice | grade7 | natural science | chemistry | Chemical reactions | Identify reactants and products | A chemical change occurs when new substances are formed from existing substances. This process is called a chemical reaction.
In a chemical reaction, one or more substances change into one or more different substances. During the reaction, the atoms of the original substances are rearranged to form other substances.
Th... | Read the underlined text carefully. Look for information about what happens to hydrogen in this chemical reaction.
Like people on Earth, astronauts living on the International Space Station need oxygen to survive. Since there is no oxygen in space for the astronauts to breathe, they make oxygen using a process called e... |
Not supported with pagination yet | What information supports the conclusion that Steven acquired this trait? | [
"Some scars fade more quickly than others.",
"Steven's scar was caused by an accident. He cut his arm when he fell off his bicycle."
] | 1 | Read the description of a trait.
Steven has a scar on his right arm. | closed choice | grade6 | natural science | biology | Genes to traits | Inherited and acquired traits: use evidence to support a statement | Organisms, including people, have both inherited and acquired traits. Inherited and acquired traits are gained in different ways.
Inherited traits are passed down from biological parents to their offspring through genes. Genes are pieces of hereditary material that contain the instructions that affect inherited traits.... | |
Not supported with pagination yet | What information supports the conclusion that Mabel inherited this trait? | [
"Mabel and her mother both have short hair.",
"Mabel's parents were born with wavy hair. They passed down this trait to Mabel."
] | 1 | Read the description of a trait.
Mabel has wavy hair. | closed choice | grade3 | natural science | biology | Heredity | Inherited and acquired traits: use evidence to support a statement | Organisms, including people, have both inherited and acquired traits. Inherited and acquired traits are gained in different ways.
Inherited traits are passed down through families. Children gain these traits from their parents. Inherited traits do not need to be learned.
Acquired traits are gained during a person's lif... | |
Not supported with pagination yet | Which sentence states a fact? | [
"Katharine Graham deserved to win a Pulitzer Prize in 1998.",
"Katharine Graham was the first female CEO of a Fortune 500 company."
] | 1 | closed choice | grade12 | language science | writing-strategies | Developing and supporting arguments | Distinguish facts from opinions | Statements of fact make claims that are based on research, observation, or experimentation. Facts can be proved with evidence.
Napoleon Bonaparte was shorter than King Louis XVI.
This statement is a fact. The statement can be verified by researching and comparing the height of each man.
Statements of opinion make claim... | The second sentence states a fact. It can be verified by looking up the history of CEOs of Fortune 500 companies.
Katharine Graham was the first female CEO of a Fortune 500 company.
The first sentence states an opinion. Deserved indicates a personal judgment.
Katharine Graham deserved to win a Pulitzer Prize in 1998. | |
Not supported with pagination yet | Which figure of speech is used in this text?
Everything in this room is eatable, even I'm eatable! But that is called cannibalism, my dear children, and is in fact frowned upon in most societies.
—Willy Wonka in Charlie and the Chocolate Factory | [
"understatement",
"apostrophe"
] | 0 | closed choice | grade11 | language science | figurative-language | Literary devices | Classify the figure of speech: anaphora, antithesis, apostrophe, assonance, chiasmus, understatement | Figures of speech are words or phrases that use language in a nonliteral or unusual way. They can make writing more expressive.
Anaphora is the repetition of the same word or words at the beginning of several phrases or clauses.
We are united. We are powerful. We are winners.
Antithesis involves contrasting opposing id... | The text uses understatement, which involves deliberately representing something as less serious or important than it really is.
Frowned upon in most societies is an understatement, since cannibalism—the eating of human flesh by another human being—is usually looked upon with horror. | |
Not supported with pagination yet | Which is a compound sentence? | [
"Brenna and her sisters drew a map of the United States and hung it on the wall.",
"This loaf of bread is almost stale, but we can make it into bread crumbs for the meatballs."
] | 1 | closed choice | grade5 | language science | grammar | Sentences, fragments, and run-ons | Is the sentence simple, compound, or complex? | A clause is a group of words that contains both a subject and a predicate.
An independent clause is a complete thought. It can stand alone as a sentence. A dependent clause is not a complete thought. It cannot stand alone as a sentence.
the oranges on our tree are ripe
The clause can stand alone. It is independent.
aft... | The first sentence is the compound sentence. It is made up of two independent clauses joined by the coordinating conjunction but.
This loaf of bread is almost stale, but we can make it into bread crumbs for the meatballs. | |
What is the name of the colony shown? | [
"Pennsylvania",
"Mississippi",
"Maryland",
"New York"
] | 3 | closed choice | grade8 | social science | us-history | Colonial America | Identify the Thirteen Colonies | The colony is New York.
During the colonial era, New Hampshire and New York both claimed the territory that would later become the state of Vermont. Vermont was never its own colony. | |||
Not supported with pagination yet | Which type of sentence is this?
Leonardo da Vinci, who was a renowned painter and sculptor, was also an inventor and scientist. | [
"compound",
"complex",
"compound-complex",
"simple"
] | 1 | closed choice | grade10 | language science | grammar | Phrases and clauses | Is the sentence simple, compound, complex, or compound-complex? | A clause is a group of words that contains both a subject and a predicate.
An independent clause is a complete thought that can stand alone as a sentence. A dependent clause (or subordinate clause) is not a complete thought and cannot stand alone as a sentence.
the oranges on our tree are ripe
The clause can stand alon... | The sentence is complex. It is made up of an independent clause and a dependent clause. The dependent clause begins with the relative pronoun who.
Leonardo da Vinci, who was a renowned painter and sculptor, was also an inventor and scientist. | |
Not supported with pagination yet | Based on this information, what is Marlin's phenotype for the eye color trait? | [
"black eyes",
"ee"
] | 0 | In a group of koi fish, some individuals have red eyes and others have black eyes. In this group, the gene for the eye color trait has two alleles. The allele E is for red eyes, and the allele e is for black eyes.
Marlin, a koi fish from this group, has black eyes. Marlin has two alleles for black eyes. | closed choice | grade6 | natural science | biology | Genes to traits | Genetics vocabulary: genotype and phenotype | All organisms have pieces of hereditary material called genes, which are passed from parents to offspring. Genes contain instructions for building the parts of an organism. An organism's genes affect its observable traits, including its appearance, its behavior, and which diseases it may have. Genes may have different ... | An organism's phenotype for a trait is its observable version of that trait. Marlin's observable version of the eye color trait is black eyes. So, Marlin's phenotype for the eye color trait is black eyes. |
Think about the magnetic force between the magnets in each pair. Which of the following statements is true? | [
"The magnitude of the magnetic force is the same in both pairs.",
"The magnitude of the magnetic force is smaller in Pair 1.",
"The magnitude of the magnetic force is smaller in Pair 2."
] | 2 | The images below show two pairs of magnets. The magnets in different pairs do not affect each other. All the magnets shown are made of the same material. | closed choice | grade5 | natural science | physics | Magnets | Compare magnitudes of magnetic forces | Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart. These pulls and pushes between magnets are called magnetic forces.
The strength of a force is called its magnitude. The greater the magnitude of the magnetic force between two magnets,... | The magnets in Pair 2 attract. The magnets in Pair 1 repel. But whether the magnets attract or repel affects only the direction of the magnetic force. It does not affect the magnitude of the magnetic force.
Distance affects the magnitude of the magnetic force. When there is a greater distance between magnets, the magni... | |
What is the capital of Kentucky? | [
"Colorado Springs",
"Charleston",
"Frankfort",
"Honolulu"
] | 2 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the Southeast | Frankfort is the capital of Kentucky. | |||
Which two months have the lowest average precipitation in Salt Lake City? | [
"September and October",
"November and December",
"July and August"
] | 2 | Use the graph to answer the question below. | closed choice | grade3 | natural science | earth-science | Weather and climate | Use climate data to make predictions | Scientists record climate data from places around the world. Precipitation, or rain and snow, is one type of climate data.
A bar graph can be used to show the average amount of precipitation each month. Months with taller bars have more precipitation on average. | To describe the average precipitation trends in Salt Lake City, look at the graph.
Choice "Jul" is incorrect.
Choice "Aug" is incorrect.
Choice "Sep" is incorrect.
Choice "Oct" is incorrect.
Choice "Nov" is incorrect.
Choice "Dec" is incorrect.
July and August each have an average precipitation of less than 1 inch. All... | |
What is the capital of South Dakota? | [
"Hilo",
"Pierre",
"Indianapolis",
"Bridgeport"
] | 1 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the Midwest | Pierre is the capital of South Dakota. | |||
During this time, thermal energy was transferred from () to (). | [
"each bottle . . . the surroundings",
"the surroundings . . . each bottle"
] | 1 | Two bottles of soda were sitting on a porch on a hot day. The two bottles were identical, except that one bottle was made of brown glass and one bottle was made of clear glass. This table shows how the temperature of each bottle changed over 25minutes. | closed choice | grade7 | natural science | physics | Thermal energy | Compare thermal energy transfers | A change in an object's temperature indicates a change in the object's thermal energy:
An increase in temperature shows that the object's thermal energy increased. So, thermal energy was transferred into the object from its surroundings.
A decrease in temperature shows that the object's thermal energy decreased. So, th... | The temperature of each bottle increased, which means that the thermal energy of each bottle increased. So, thermal energy was transferred from the surroundings to each bottle. | |
Which term matches the picture? | [
"conduction",
"convection"
] | 1 | Read the text.
Heat transfer can occur in different ways. Two common ways are through conduction and convection. Conduction occurs when molecules from one object collide with molecules from another object. Burning your hand by touching a hot car door on a sunny summer day is an example of conduction.
Convection is anot... | closed choice | grade6 | language science | vocabulary | Context clues | Determine the meaning of domain-specific words with pictures | Convection is the movement of a liquid or gas away from a heat source. When water starts to boil, bubbles of hot gas rise through the water, moving away from the source of heat. | ||
What is the capital of Texas? | [
"Houston",
"Austin",
"Charleston",
"Richmond"
] | 1 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the Southeast | Austin is the capital of Texas. | |||
Identify the question that Brody's experiment can best answer. | [
"Does the type of flour used in the muffins affect the number of muffins that turn brown after 30 minutes in the oven?",
"Do muffins made with white flour have larger volumes than muffins made with whole wheat flour?"
] | 1 | The passage below describes an experiment. Read the passage and then follow the instructions below.
Brody made six batches of muffins over the course of one day. He used whole wheat flour in three of the batches and white flour in the other three batches. He divided the batter into muffin tins, using two ounces of bat... | closed choice | grade8 | natural science | science-and-engineering-practices | Designing experiments | Identify the experimental question | Experiments can be designed to answer specific questions. How can you identify the questions that a certain experiment can answer? In order to do this, you need to figure out what was tested and what was measured during the experiment.
Imagine an experiment with two groups of daffodil plants. One group of plants was gr... | ||
Not supported with pagination yet | Which word would you find on a dictionary page with the following guide words?
tender - torn | [
"tray",
"thankful"
] | 1 | closed choice | grade3 | language science | reference-skills | Reference skills | Use guide words | Guide words appear on each page of a dictionary. They tell you the first word and last word on the page. The other words on the page come between the guide words in alphabetical order.
To put words in alphabetical order, put them in order by their first letters. If the first letters are the same, look at the second let... | Put the words in alphabetical order.
Since thankful is between the guide words tender - torn, it would be found on that page. | |
Identify the question that Gabby's experiment can best answer. | [
"Does linen fabric turn darker than cotton fabric when soaked in a mixture of black dye and water?",
"Does fabric turn darker when soaked in a mixture of black dye and water for 15 minutes compared to 30 minutes?"
] | 0 | The passage below describes an experiment. Read the passage and then follow the instructions below.
Gabby prepared ten buckets, each with one gallon of boiling water and three tablespoons of black fabric dye. Gabby soaked white linen fabric squares in five of the buckets, and white cotton fabric squares in the other f... | closed choice | grade7 | natural science | science-and-engineering-practices | Designing experiments | Identify the experimental question | Experiments can be designed to answer specific questions. How can you identify the questions that a certain experiment can answer? In order to do this, you need to figure out what was tested and what was measured during the experiment.
Imagine an experiment with two groups of daffodil plants. One group of plants was gr... | ||
Not supported with pagination yet | Assume all other forces on Megan are balanced. Which statement describes the forces on Megan? | [
"The forces are balanced, so there is no net force on Megan.",
"The forces are unbalanced, so there is a net force on Megan."
] | 1 | Megan is sitting on a roller coaster cart as it reaches the bottom of a big loop. Earth's gravity is pulling down on Megan with a force of 600N. The seat of the cart is pushing up on Megan with a force of 1,200N. | closed choice | grade7 | natural science | physics | Velocity, acceleration, and forces | Balanced and unbalanced forces | A force is a push or a pull that acts on an object. Every force has a direction and a magnitude, or strength. If two forces act on an object in opposite directions, the forces are called opposing forces.
When opposing forces have the same magnitude, they are balanced. If all the forces on an object are balanced, there ... | To determine if there is a net force on Megan, look at the forces:
Earth's gravity is pulling Megan down with a force of 600 N.
The seat of the cart is pushing Megan up with a force of 1,200 N.
The forces are in opposite directions, and the forces have different magnitudes: 600 N and 1,200 N. This means that the forces... |
Not supported with pagination yet | How long is a long-distance running race? | [
"24 meters",
"24 kilometers",
"24 centimeters",
"24 millimeters"
] | 1 | Select the best estimate. | closed choice | grade6 | natural science | units-and-measurement | Units and measurement | Choose metric units of distance, mass, and volume | Measurements are written with both a number and a unit. The unit comes after the number. The unit shows what the number means.
When you are using metric units, length can be written with units of millimeters, centimeters, meters, or kilometers. One meter contains 100 centimeters or 1,000 millimeters. So, 1 meter is lar... | The best estimate for the length of a long-distance running race is 24 kilometers.
24 millimeters, 24 centimeters, and 24 meters are all too short. |
Which of these states is farthest east? | [
"South Dakota",
"Washington",
"California",
"Utah"
] | 0 | closed choice | grade3 | social science | geography | Geography | Read a map: cardinal directions | Maps have four cardinal directions, or main directions. Those directions are north, south, east, and west.
A compass rose is a set of arrows that point to the cardinal directions. A compass rose usually shows only the first letter of each cardinal direction.
The north arrow points to the North Pole. On most maps, north... | To find the answer, look at the compass rose. Look at which way the east arrow is pointing. South Dakota is farthest east. | ||
Not supported with pagination yet | Which text uses the word terribly in its traditional sense? | [
"Wesley shivered as he gazed at the terribly steep, snowy slope. After calming his nerves, he began his descent.",
"Wesley shivered terribly as he gazed at the snow-clad slope. After calming his nerves, he began his descent."
] | 1 | closed choice | grade9 | language science | writing-strategies | Word usage and nuance | Explore words with new or contested usages | Words change in meaning when speakers begin using them in new ways. For example, the word peruse once only meant to examine in detail, but it's now also commonly used to mean to look through in a casual manner.
When a word changes in meaning, its correct usage is often debated. Although a newer sense of the word may be... | The second text uses terribly in its traditional sense: in a terrible manner.
Wesley shivered terribly as he gazed at the snow-clad slope. After calming his nerves, he began his descent.
The first text uses terribly in its nontraditional sense: extremely; very.
Wesley shivered as he gazed at the terribly steep, snowy s... | |
What is the capital of Rhode Island? | [
"Boston",
"Milwaukee",
"Newport",
"Providence"
] | 3 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the Northeast | Providence is the capital of Rhode Island. | |||
Not supported with pagination yet | Which correctly shows the title of a movie? | [
"\"A Kiss for Cinderella\"",
"***A Kiss for Cinderella***"
] | 1 | closed choice | grade4 | language science | punctuation | Formatting | Formatting titles | The title of a book, movie, play, TV show, magazine, or newspaper should be in italics. If you write it by hand, it can be underlined instead.
A Midsummer Night's Dream
The title of a poem, song, article, or short story should be in quotation marks.
"You Are My Sunshine" | A movie should be in italics.
The correct title is **A Kiss for Cinderella**. | |
Which property do these three objects have in common? | [
"salty",
"yellow",
"hard"
] | 2 | Select the best answer. | closed choice | grade4 | natural science | physics | Materials | Compare properties of objects | An object has different properties. A property of an object can tell you how it looks, feels, tastes, or smells. Properties can also tell you how an object will behave when something happens to it.
Different objects can have properties in common. You can use these properties to put objects into groups. Grouping objects... | Look at each object.
For each object, decide if it has that property.
A hard object does not change shape when pressed or squeezed. All three objects are hard.
Yellow is a color.
This color is yellow. The bracelet is yellow, but the shield is not.
Potato chips have a salty taste. The rainbow sucker is not salty.
The pr... | |
Does Hevea brasiliensis have cells that have a nucleus? | [
"yes",
"no"
] | 0 | This organism is Hevea brasiliensis. It is a member of the plant kingdom.
Hevea brasiliensis is commonly called a rubber tree. Rubber trees make a white liquid called latex. Rubber trees use latex for protection. Latex has a bad taste and can be poisonous to some animals. So, the latex helps to stop animals from eating... | yes or no | grade4 | natural science | biology | Classification | Describe, classify, and compare kingdoms | In the past, scientists classified living organisms into two groups: plants and animals. Over the past 300 years, scientists have discovered many more types of organisms. Today, many scientists classify organisms into six broad groups, called kingdoms.
Organisms in each kingdom have specific traits. The table below sho... | Hevea brasiliensis is a plant. Plant cells have a nucleus. | |
Is the following statement about our solar system true or false?
Jupiter's volume is more than 1,000 times as great as Earth's volume. | [
"true",
"false"
] | 0 | Use the data to answer the question below. | true-or false | grade6 | natural science | earth-science | Astronomy | Analyze data to compare properties of planets | A planet's volume tells you the size of the planet.
The primary composition of a planet is what the planet is made mainly of. In our solar system, planets are made mainly of rock, gas, or ice. | To determine if this statement is true, calculate the value of 1,000 times the volume of Earth.
Then compare the result to the volume of Jupiter. Jupiter's volume is 1,431,280 billion km^3, which is more than 1,090,000 billion km^3. So, Jupiter's volume is more than 1,000 times as great as Earth's volume. | |
Which animal's body is better adapted for protection against a predator with sharp teeth? | [
"ring-necked pheasant",
"queen scallop"
] | 1 | Painted turtles are adapted to protect themselves from a predator with sharp teeth. They have hard outer shells covering their bodies. A can pull its head and legs into its shell when attacked.
Figure: painted turtle. | closed choice | grade3 | natural science | biology | Adaptations | Animal adaptations: skins and body coverings | An adaptation is an inherited trait that helps an organism survive or reproduce. Adaptations can include both body parts and behaviors.
The color, texture, and covering of an animal's skin are examples of adaptations. Animals' skins can be adapted in different ways. For example, skin with thick fur might help an animal... | Look at the picture of the painted turtle.
The painted turtle has a hard outer shell. Its body is adapted for protection against a predator with sharp teeth. The hard shell makes it difficult for predators to hurt or kill the painted turtle.
Now look at each animal. Figure out which animal has a similar adaptation.
The... | |
Not supported with pagination yet | What does the verbal irony in this text suggest?
"This salsa could use a little more spice," Vijay said as he gulped down water and wiped tears from his eyes. | [
"The salsa was too spicy.",
"The salsa was tasteless."
] | 0 | closed choice | grade8 | language science | figurative-language | Literary devices | Interpret figures of speech | Figures of speech are words or phrases that use language in a nonliteral or unusual way. They can make writing more expressive.
Verbal irony involves saying one thing but implying something very different. People often use verbal irony when they are being sarcastic.
Olivia seems thrilled that her car keeps breaking dow... | The text uses verbal irony, which involves saying one thing but implying something very different.
Could use a little more spice ironically suggests that the salsa was too spicy. Vijay gulped down water and wiped tears from his eyes, indications that the salsa was indeed too spicy. | |
Complete the text to describe the diagram.
Solute particles moved in both directions across the permeable membrane. But more solute particles moved across the membrane (). When there was an equal concentration on both sides, the particles reached equilibrium. | [
"to the right than to the left",
"to the left than to the right"
] | 1 | The diagram below shows a solution with one solute. Each solute particle is represented by a purple ball. The solution fills a closed container that is divided in half by a membrane. The membrane, represented by a dotted line, is permeable to the solute particles.
The diagram shows how the solution can change over time... | closed choice | grade8 | natural science | chemistry | Solutions | Diffusion across membranes | In a solution, solute particles move and spread throughout the solvent. The diagram below shows how a solution can change over time. Solute particles move from the area where they are at a higher concentration to the area where they are at a lower concentration. This movement happens through the process of diffusion.
A... | Look at the diagram again. It shows you how the solution changed during the process of diffusion.
Before the solute particles reached equilibrium, there were 2 solute particles on the left side of the membrane and 6 solute particles on the right side of the membrane.
When the solute particles reached equilibrium, there... | |
How long do Nile crocodile eggs stay buried in the sand? | [
"three months",
"three days"
] | 0 | Read the passage about Nile crocodiles.
Nile crocodiles are big and scary. But they're also good parents! The mother crocodile lays her eggs in a hole in the sand. Then, for three months, she watches over them and keeps them safe. The father helps, too.
When the eggs are ready to hatch, the babies inside make special n... | closed choice | grade2 | language science | reading-comprehension | Independent reading comprehension | Read and understand informational passages | Look at the passage. It tells you how long Nile crocodile eggs stay buried in the sand.
Nile crocodiles are big and scary. But they're also good parents! The mother crocodile lays her eggs in a hole in the sand. Then, for three months, she watches over them and keeps them safe. The father helps, too. | ||
Not supported with pagination yet | Is the following trait inherited or acquired?
Jason can ride a motorcycle. | [
"inherited",
"acquired"
] | 1 | Hint: Riding a motorcycle well takes practice. | closed choice | grade4 | natural science | biology | Traits and heredity | Identify inherited and acquired traits | Organisms, including people, have both inherited and acquired traits. Inherited and acquired traits are gained in different ways.
Inherited traits are passed down through families. Children gain these traits from their parents. Inherited traits do not need to be learned.
Acquired traits are gained during a person's lif... | People are not born knowing how to ride a motorcycle. Instead, many people learn how to ride. So, riding a motorcycle is an acquired trait. |
What is the name of the colony shown? | [
"Illinois",
"West Virginia",
"Massachusetts",
"Ohio"
] | 2 | closed choice | grade4 | social science | us-history | English colonies in North America | Identify the Thirteen Colonies | The colony is Massachusetts.
The Massachusetts Colony included land that would later become the state of Maine. Maine was never its own colony. | |||
Not supported with pagination yet | Assume all other forces on Martin are balanced. Which statement describes the forces on Martin? | [
"The forces are balanced, so there is no net force on Martin.",
"The forces are unbalanced, so there is a net force on Martin."
] | 0 | Martin is standing on a diving board at the pool. Earth's gravity is pulling down on Martin with a force of 400N. The diving board is pushing up on Martin with a force of 400N. | closed choice | grade6 | natural science | physics | Velocity, acceleration, and forces | Balanced and unbalanced forces | A force is a push or a pull that acts on an object. Every force has a direction and a magnitude, or strength. If two forces act on an object in opposite directions, the forces are called opposing forces.
When opposing forces have the same magnitude, they are balanced. If all the forces on an object are balanced, there ... | To determine if there is a net force on Martin, look at the forces:
Earth's gravity is pulling Martin down with a force of 400 N.
The diving board is pushing Martin up with a force of 400 N.
The forces are in opposite directions, and the forces have the same magnitude: 400 N. This means that the forces are balanced, so... |
Think about the magnetic force between the magnets in each pair. Which of the following statements is true? | [
"The magnitude of the magnetic force is greater in Pair 1.",
"The magnitude of the magnetic force is the same in both pairs.",
"The magnitude of the magnetic force is greater in Pair 2."
] | 2 | The images below show two pairs of magnets. The magnets in different pairs do not affect each other. All the magnets shown are made of the same material. | closed choice | grade7 | natural science | physics | Velocity, acceleration, and forces | Compare magnitudes of magnetic forces | Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart. These pulls and pushes between magnets are called magnetic forces.
The strength of a force is called its magnitude. The greater the magnitude of the magnetic force between two magnets,... | The magnets in Pair 2 attract. The magnets in Pair 1 repel. But whether the magnets attract or repel affects only the direction of the magnetic force. It does not affect the magnitude of the magnetic force.
Distance affects the magnitude of the magnetic force. When there is a smaller distance between magnets, the magni... | |
Not supported with pagination yet | Suppose Isabelle decides to bake bran muffins. Which result would be a cost? | [
"Isabelle will get to eat more muffins. She can make more bran muffins than chocolate muffins.",
"Isabelle will give up the chance to eat chocolate muffins. She thinks chocolate muffins are tastier than bran muffins."
] | 1 | Isabelle is deciding whether to bake chocolate muffins or bran muffins. She wants the muffins to be tasty. But she also wants to make a lot of muffins. | closed choice | grade4 | social science | economics | Basic economic principles | Costs and benefits | Before you decide to do something, it is often helpful to list costs and benefits.
Costs are what you give up or spend when you decide to do something. Costs involve giving up things that you want or need.
Benefits are what you gain or save when you decide to do something. Benefits involve gaining something that you wa... | This result is a cost. It involves giving up or spending something that Isabelle wants or needs:
Isabelle will give up the chance to eat chocolate muffins. She thinks chocolate muffins are tastier than bran muffins. |
Not supported with pagination yet | According to Newton's third law, what other force must be happening? | [
"The door is pushing on Kinsley's hand.",
"The door is pulling on Kinsley's hand."
] | 0 | Isaac Newton was born in the 1600s and studied how objects move. He discovered three fundamental laws about forces and motion. According to Newton's third law, for every force, there is an equal and opposite force.
Consider the following force:
Kinsley's hand is pushing on a door. | closed choice | grade6 | natural science | physics | Velocity, acceleration, and forces | Predict forces using Newton's third law | According to Newton's third law, for every force, there is an equal and opposite force. This means that if one object is applying a force on a second object, the second object must also be applying a force on the first object, but in the opposite direction.
For example, if your hand is pushing down on a table, the tabl... | Kinsley's hand is pushing on the door. So, Newton's third law tells you that the door is pushing on Kinsley's hand. |
Which continent is highlighted? | [
"Asia",
"Antarctica",
"North America",
"Europe"
] | 3 | closed choice | grade5 | social science | geography | Oceans and continents | Identify oceans and continents | A continent is one of the major land masses on the earth. Most people say there are seven continents. | This continent is Europe. | ||
Which property do these two objects have in common? | [
"stretchy",
"blue"
] | 1 | Select the better answer. | closed choice | grade2 | natural science | physics | Materials | Compare properties of objects | An object has different properties. A property of an object can tell you how it looks, feels, tastes, or smells.
Different objects can have the same properties. You can use these properties to put objects into groups. | Look at each object.
For each object, decide if it has that property.
A stretchy object gets longer when you pull on it. The binder is not stretchy.
Blue is a color.
This color is blue. Both objects are blue.
The property that both objects have in common is blue. | |
Not supported with pagination yet | Suppose Meg decides to plant the magnolia tree. Which result would be a cost? | [
"The magnolia tree will use up more space than the hydrangeas would have used up.",
"Meg will get to look at the magnolia tree. She thinks it will look more beautiful than the hydrangeas would have looked."
] | 0 | Meg is deciding whether to plant hydrangeas or a magnolia tree in her backyard. She wants to make her backyard more beautiful. But she also wants to leave space for doing fun things. | closed choice | grade4 | social science | economics | Basic economic principles | Costs and benefits | Before you decide to do something, it is often helpful to list costs and benefits.
Costs are what you give up or spend when you decide to do something. Costs involve giving up things that you want or need.
Benefits are what you gain or save when you decide to do something. Benefits involve gaining something that you wa... | This result is a cost. It involves giving up or spending something that Meg wants or needs:
The magnolia tree will use up more space than the hydrangeas would have used up. |
Is a pair of dice a solid, a liquid, or a gas? | [
"a gas",
"a liquid",
"a solid"
] | 2 | closed choice | grade3 | natural science | physics | States of matter | Classify matter as solid, liquid, or gas | Solid, liquid, and gas are states of matter. Matter is anything that takes up space. Matter can come in different states, or forms.
When matter is a solid, it has a definite volume and a definite shape. So, a solid has a size and shape of its own.
Some solids can be easily folded, bent, or broken. A piece of paper is a... | A pair of dice is a solid. A solid has a size and shape of its own.
When you roll a pair of dice, the dice have a shape of their own. They are still cubes when they stop rolling. | ||
Does Hydra vulgaris have cells that have a nucleus? | [
"yes",
"no"
] | 0 | This organism is Hydra vulgaris. It is a member of the animal kingdom.
Hydra vulgaris can make new offspring through a process called budding. A small H. vulgaris can start to grow from the side of its parent. When the baby H. vulgaris is fully grown, it will split off from its parent. | yes or no | grade4 | natural science | biology | Classification | Describe, classify, and compare kingdoms | In the past, scientists classified living organisms into two groups: plants and animals. Over the past 300 years, scientists have discovered many more types of organisms. Today, many scientists classify organisms into six broad groups, called kingdoms.
Organisms in each kingdom have specific traits. The table below sho... | Hydra vulgaris is an animal. Animal cells have a nucleus. | |
Not supported with pagination yet | Which correctly shows the title of a song? | [
"\"Black or White\"",
"Black or White"
] | 0 | closed choice | grade9 | language science | punctuation | Formatting | Formatting titles | The title of a book, movie, play, TV show, magazine, or newspaper should be in italics. If you write it by hand, it can be underlined instead.
A Midsummer Night's Dream
The title of a poem, song, article, or short story should be in quotation marks.
"You Are My Sunshine" | A song should be in quotation marks.
The correct title is "Black or White." | |
Which of the following could Justine's test show? | [
"whether she added enough nutrients to help the bacteria produce 20% more insulin",
"whether producing more insulin would help the bacteria grow faster",
"whether different types of bacteria would need different nutrients to produce insulin"
] | 0 | People can use the engineering-design process to develop solutions to problems. One step in the process is testing if a potential solution meets the requirements of the design.
The passage below describes how the engineering-design process was used to test a solution to a problem. Read the passage. Then answer the ques... | closed choice | grade7 | natural science | science-and-engineering-practices | Engineering practices | Evaluate tests of engineering-design solutions | People can use the engineering-design process to develop solutions to problems. One step in the process is testing if a potential solution meets the requirements of the design. How can you determine what a test can show? You need to figure out what was tested and what was measured.
Imagine an engineer needs to design a... | ||
Not supported with pagination yet | Which of the following contains a vague pronoun reference? | [
"Does the university directory list contact information for the head of the English department?",
"Does it list contact information for the head of the English department?"
] | 1 | closed choice | grade7 | language science | writing-strategies | Pronouns and antecedents | Identify vague pronoun references | When writing, make sure to avoid vague pronoun references. A vague pronoun reference occurs when a pronoun could refer to more than one possible antecedent.
When Lisa and Kim finally landed, she breathed a sigh of relief.
The pronoun she could refer to either Lisa or Kim, so the meaning of the sentence is unclear.
Vagu... | The second answer choice contains a vague pronoun reference. The pronoun it is used without its antecedent.
The first answer choice shows a possible correction for the vague pronoun reference. It has been replaced with the university directory.
Does the university directory list contact information for the head of the ... | |
Not supported with pagination yet | Which tense does the sentence use?
Akiko teaches Audrey about customs in Japan. | [
"future tense",
"past tense",
"present tense"
] | 2 | closed choice | grade5 | language science | verbs | Verb tense | Is the sentence in the past, present, or future tense? | Present tense verbs tell you about something that is happening now.
Most present-tense verbs are regular. They have no ending, or they end in -s or -es.
Two verbs are irregular in the present tense, to be and to have. You must remember their forms.
Past tense verbs tell you about something that has already happened.
Mo... | The sentence is in present tense. You can tell because it uses a present-tense verb, teaches. The verb ends in -es and tells you about something that is true or happening now. | |
Not supported with pagination yet | How long is the Mississippi River? | [
"2,300 feet",
"2,300 inches",
"2,300 yards",
"2,300 miles"
] | 3 | Select the best estimate. | closed choice | grade7 | natural science | units-and-measurement | Units and measurement | Choose customary units of distance, mass, and volume | Measurements are written with both a number and a unit. The unit comes after the number. The unit shows what the number means.
When you are using customary units, length may be written with units of inches, feet, yards, or miles.
There are 12 inches in 1 foot, and 3 feet in 1 yard. There are 5,280 feet in 1 mile.
A foo... | The best estimate for the length of the Mississippi River is 2,300 miles.
2,300 inches, 2,300 feet, and 2,300 yards are all too short. |
Which of the following could Noah's test show? | [
"if the sample fabric would absorb one drop of water in less than one second",
"how long it would take the sample fabric to dry after it absorbed one drop of water",
"how much athletes would sweat in the fabric"
] | 1 | People can use the engineering-design process to develop solutions to problems. One step in the process is testing if a potential solution meets the requirements of the design.
The passage below describes how the engineering-design process was used to test a solution to a problem. Read the passage. Then answer the ques... | closed choice | grade7 | natural science | science-and-engineering-practices | Engineering practices | Evaluate tests of engineering-design solutions | People can use the engineering-design process to develop solutions to problems. One step in the process is testing if a potential solution meets the requirements of the design. How can you determine what a test can show? You need to figure out what was tested and what was measured.
Imagine an engineer needs to design a... | ||
Which better describes the Buffalo Gap National Grassland ecosystem? | [
"It has hot summers. It also has soil that is rich in nutrients.",
"It has a small amount of rain. It also has dry, thin soil."
] | 0 | Figure: Buffalo Gap National Grassland.
Buffalo Gap National Grassland is a prairie grassland ecosystem in southwestern South Dakota. | closed choice | grade4 | natural science | biology | Ecosystems | Describe ecosystems | An environment includes all of the biotic, or living, and abiotic, or nonliving, things in an area. An ecosystem is created by the relationships that form among the biotic and abiotic parts of an environment.
There are many different types of terrestrial, or land-based, ecosystems. Here are some ways in which terrestri... | A prairie grassland is a type of ecosystem. Prairie grasslands have the following features: hot summers and cool winters, a medium amount of rain, and soil that is rich in nutrients. So, the Buffalo Gap National Grassland has hot summers. It also has soil that is rich in nutrients. | |
Not supported with pagination yet | The city of Fairview has been one of the world's biggest makers of cough drops for many years. But last month, Fairview's cough drop factories were destroyed by floods. What will probably happen to the overall supply of cough drops? | [
"The supply will probably go up.",
"The supply will probably go down."
] | 1 | closed choice | grade8 | social science | economics | Supply and demand | Understand overall supply and demand | Overall supply is the total amount of a good or service that producers make and sell. There are several things that can make overall supply go up or down. The table below shows how changes to these things might affect overall supply.
| Resources | Number of producers or suppliers | Expected change in demand
Supply goe... | Floods destroyed the cough drop factories in Fairview. The number of producers of cough drops went down. So, the supply of cough drops will probably go down. | |
Not supported with pagination yet | Which word would you find on a dictionary page with the following guide words?
harness - hotel | [
"hurdle",
"himself"
] | 1 | closed choice | grade7 | language science | reference-skills | Reference skills | Use guide words | Guide words appear on each page of a dictionary. They tell you the first word and last word on the page. The other words on the page come between the guide words in alphabetical order.
To put words in alphabetical order, put them in order by their first letters. If the first letters are the same, look at the second let... | Put the words in alphabetical order.
Since himself is between the guide words harness - hotel, it would be found on that page. | |
Not supported with pagination yet | How long does it take to sing the ABC song? | [
"26 seconds",
"26 minutes"
] | 0 | Select the better estimate. | closed choice | grade3 | natural science | units-and-measurement | Units and measurement | Choose units of time | Measurements are written with both a number and a unit. The unit comes after the number. The unit shows what the number means.
Imagine being told that the bus leaves in 7. You might be thinking, 7 what? Does the bus leave in 7 minutes? 7 seconds?
The number 7 on its own does not give you much information about when the... | The better estimate for how long it takes to sing the ABC song is 26 seconds.
26 minutes is too slow. |
What is the capital of New Mexico? | [
"Denver",
"Santa Fe",
"Harrisburg",
"Albuquerque"
] | 1 | closed choice | grade5 | social science | geography | State capitals | Identify the 50 state capitals | Santa Fe is the capital of New Mexico. | |||
Not supported with pagination yet | Based on this information, what is Peanut's phenotype for the fur color trait? | [
"ff",
"brown fur"
] | 1 | In a group of rabbits, some individuals have black fur and others have brown fur. In this group, the gene for the fur color trait has two alleles. The allele F is for black fur, and the allele f is for brown fur.
Peanut, a rabbit from this group, has brown fur. Peanut has two alleles for brown fur. | closed choice | grade6 | natural science | biology | Genes to traits | Genetics vocabulary: genotype and phenotype | All organisms have pieces of hereditary material called genes, which are passed from parents to offspring. Genes contain instructions for building the parts of an organism. An organism's genes affect its observable traits, including its appearance, its behavior, and which diseases it may have. Genes may have different ... | An organism's phenotype for a trait is its observable version of that trait. Peanut's observable version of the fur color trait is brown fur. So, Peanut's phenotype for the fur color trait is brown fur. |
Which solution has a higher concentration of pink particles? | [
"Solution B",
"Solution A",
"neither; their concentrations are the same"
] | 1 | The diagram below is a model of two solutions. Each pink ball represents one particle of solute. | closed choice | grade6 | natural science | chemistry | Solutions | Compare concentrations of solutions | A solution is made up of two or more substances that are completely mixed. In a solution, solute particles are mixed into a solvent. The solute cannot be separated from the solvent by a filter. For example, if you stir a spoonful of salt into a cup of water, the salt will mix into the water to make a saltwater solution... | In Solution A and Solution B, the pink particles represent the solute. To figure out which solution has a higher concentration of pink particles, look at both the number of pink particles and the volume of the solvent in each container.
Use the concentration formula to find the number of pink particles per milliliter.
... | |
Which animal's skin is better adapted to hurt an attacking predator? | [
"scrub hare",
"blowfish"
] | 1 | Thorny devils have sharp spines covering much of their skin. The skin of the is adapted to hurt an attacking predator.
Figure: thorny devil. | closed choice | grade5 | natural science | biology | Adaptations | Animal adaptations: skins and body coverings | An adaptation is an inherited trait that helps an organism survive or reproduce. Adaptations can include both body parts and behaviors.
The color, texture, and covering of an animal's skin are examples of adaptations. Animals' skins can be adapted in different ways. For example, skin with thick fur might help an animal... | Look at the picture of the thorny devil.
The thorny devil has sharp spines on its skin. Its skin is adapted to hurt an attacking predator. The spines can harm a predator that tries to bite the thorny devil.
Now look at each animal. Figure out which animal has a similar adaptation.
The blowfish has sharp spines on its s... | |
Compare the average kinetic energies of the particles in each sample. Which sample has the higher temperature? | [
"neither; the samples have the same temperature",
"sample A",
"sample B"
] | 1 | The diagrams below show two pure samples of gas in identical closed, rigid containers. Each colored ball represents one gas particle. Both samples have the same number of particles. | closed choice | grade7 | natural science | physics | Particle motion and energy | Identify how particle motion affects temperature and pressure | The temperature of a substance depends on the average kinetic energy of the particles in the substance. The higher the average kinetic energy of the particles, the higher the temperature of the substance.
The kinetic energy of a particle is determined by its mass and speed. For a pure substance, the greater the mass of... | Each particle in the two samples has the same mass, but the particles in sample A have a higher average speed than the particles in sample B. So, the particles in sample A have a higher average kinetic energy than the particles in sample B.
Because the particles in sample A have the higher average kinetic energy, sampl... | |
Not supported with pagination yet | Would you find the word impolite on a dictionary page with the following guide words?
ice - intense | [
"no",
"yes"
] | 1 | yes or no | grade5 | language science | reference-skills | Reference skills | Use guide words | Guide words appear on each page of a dictionary. They tell you the first word and last word on the page. The other words on the page come between the guide words in alphabetical order.
To put words in alphabetical order, put them in order by their first letters. If the first letters are the same, look at the second let... | Put the words in alphabetical order.
Since impolite is between the guide words ice - intense, it would be found on that page. | |
Not supported with pagination yet | Which type of sentence is this?
Kathleen is a competitive horseback rider, and she will be competing in the next World Equestrian Games, which are held every four years. | [
"simple",
"compound-complex",
"compound",
"complex"
] | 1 | closed choice | grade10 | language science | grammar | Phrases and clauses | Is the sentence simple, compound, complex, or compound-complex? | A clause is a group of words that contains both a subject and a predicate.
An independent clause is a complete thought that can stand alone as a sentence. A dependent clause (or subordinate clause) is not a complete thought and cannot stand alone as a sentence.
the oranges on our tree are ripe
The clause can stand alon... | The sentence is compound-complex. It is made up of two independent clauses and a dependent clause. The dependent clause begins with the relative pronoun which.
Kathleen is a competitive horseback rider, and she will be competing in the next World Equestrian Games, which are held every four years. | |
Select the organism in the same species as the black-headed gull. | [
"Procambarus clarkii",
"Chroicocephalus serranus",
"Chroicocephalus ridibundus"
] | 2 | This organism is a black-headed gull. Its scientific name is Chroicocephalus ridibundus. | closed choice | grade5 | natural science | biology | Scientific names | Use scientific names to classify organisms | Scientists use scientific names to identify organisms. Scientific names are made of two words.
The first word in an organism's scientific name tells you the organism's genus. A genus is a group of organisms that share many traits.
A genus is made up of one or more species. A species is a group of very similar organisms... | A black-headed gull's scientific name is Chroicocephalus ridibundus.
Chroicocephalus ridibundus is in the same genus as Chroicocephalus serranus, but they are not in the same species.
Organisms in the same species have the same scientific names. Chroicocephalus ridibundus and Chroicocephalus serranus are different spec... | |
Not supported with pagination yet | Which figure of speech is used in this text?
Emilio returned to the parking lot to find his car somewhat destroyed. Apparently someone had crashed into it while he was working and had broken the entire front windshield. | [
"euphemism",
"oxymoron"
] | 1 | closed choice | grade12 | language science | figurative-language | Literary devices | Classify the figure of speech: euphemism, hyperbole, oxymoron, paradox | Figures of speech are words or phrases that use language in a nonliteral or unusual way. They can make writing more expressive.
A euphemism is a polite or indirect expression that is used to de-emphasize an unpleasant topic.
The head of Human Resources would never refer to firing people, only to laying them off.
Hyperb... | The text uses an oxymoron, a joining of two seemingly contradictory terms.
Somewhat destroyed is a contradiction, because somewhat means partially or moderately, and destroyed implies totally wrecked. | |
Not supported with pagination yet | Which is a compound sentence? | [
"Later the sailors will wash the deck of the ship.",
"The sun came out, and the clouds in the sky disappeared."
] | 1 | closed choice | grade3 | language science | grammar | Sentences, fragments, and run-ons | Is the sentence simple or compound? | A simple sentence is a sentence with only one subject and predicate.
The pitcher threw the ball to first base.
A compound sentence is two simple sentences joined by a comma and a conjunction such as and, but, or, or so.
The pitcher threw the ball, and the batter hit it.
Some simple sentences have a compound subject or ... | The first sentence is the compound sentence. It is made up of two simple sentences joined by a comma and the conjunction and.
The sun came out, and the clouds in the sky disappeared. | |
Not supported with pagination yet | Using only these supplies, which question can Michelle investigate with an experiment? | [
"Will eight ounces of carbonated water or eight ounces of tap water get warmer when placed in a jar in the sun?",
"When placed in the sun, will eight ounces of water in a glass jar or eight ounces of water in a plastic cup get warmer?",
"When placed in the sun, will eight ounces of water in a closed jar or eigh... | 2 | Michelle leaves a glass jar of cold tea outside in full sunlight. When she goes to get it, she notices that the tea is warm. She wonders what factors affect how warm a liquid gets from sitting in the sunlight. So, she decides to design an experiment. She has the following supplies available:
two identical glass jars
tw... | closed choice | grade7 | natural science | science-and-engineering-practices | Designing experiments | Identify questions that can be investigated with a set of materials | Experiments can be designed to answer specific questions. When designing an experiment, you must identify the supplies that are necessary to answer your question. In order to do this, you need to figure out what will be tested and what will be measured during the experiment.
Imagine that you are wondering if plants gro... | |
Not supported with pagination yet | Select the animal. | [
"Catfish swim underwater.",
"Oleander trees can grow colorful flowers."
] | 0 | closed choice | grade2 | natural science | biology | Classification | Identify plants and animals | Plants and animals are living things. Living things are called organisms.
Plants come in many shapes and sizes. Most plants grow in the ground. They might grow leaves, flowers, and fruit. Plants cannot move around on their own like animals can.
Animals also come in many shapes and sizes. Most animals can move around. A... | A catfish is an animal. It swims underwater.
A catfish is a fish. Unlike most other fish, catfish do not have scales! They have slimy skin.
An oleander tree is a plant. It can grow colorful flowers.
There are over 400 different types of oleander plants. | |
Not supported with pagination yet | The mom and dad push the strollers at the same speed. Which stroller is pushed with a larger force? | [
"a stroller with kid that weighs 22 pounds",
"a stroller with kid that weighs 28 pounds"
] | 1 | A mom, a dad, and two kids are going for a walk. The mom and the dad each push one of the kids in a stroller. The strollers are the same. But the kids are different sizes. | closed choice | grade2 | natural science | physics | Force and motion | How do mass and force affect motion? | A force is a push or a pull.
A force can make an object start moving or stop an object that is moving. A force can also make an object speed up, slow down, or change direction.
Forces can be different sizes.
Think about trying to move a heavy object and a light object. Imagine you want to move them at the same speed. Y... | Look for the stroller that is heavier.
A stroller holding a kid that weighs 28 pounds is heavier than a stroller holding a kid that weighs 22 pounds. So, the stroller holding the kid that weighs 28 pounds needs to be pushed with a larger force to start moving forward at the same speed as the other other stroller. |
Not supported with pagination yet | Compare the motion of three cars. Which car was moving at the lowest speed? | [
"a car that moved 435miles west in 10hours",
"a car that moved 655miles east in 10hours",
"a car that moved 400miles north in 10hours"
] | 2 | closed choice | grade3 | natural science | physics | Force and motion | Compare the speeds of moving objects | An object's speed tells you how fast the object is moving. Speed depends on both distance and time.
Distance tells you how far the object has moved. One unit used to measure distance is the mile.
Time tells you how long the object has spent moving. One unit used to measure time is the hour.
Think about objects moving f... | Look at the distance each car moved and the time it took to move that distance. The direction each car moved does not affect its speed.
Notice that each car moved for 10 hours. The car that moved 400 miles moved the shortest distance in that time. So, that car must have moved at the lowest speed. | |
Which of these states is farthest north? | [
"Indiana",
"New Hampshire",
"Rhode Island",
"Louisiana"
] | 1 | closed choice | grade5 | social science | geography | Maps | Read a map: cardinal directions | Maps have four cardinal directions, or main directions. Those directions are north, south, east, and west.
A compass rose is a set of arrows that point to the cardinal directions. A compass rose usually shows only the first letter of each cardinal direction.
The north arrow points to the North Pole. On most maps, north... | To find the answer, look at the compass rose. Look at which way the north arrow is pointing. New Hampshire is farthest north. | ||
Which continent is highlighted? | [
"South America",
"Antarctica",
"Europe",
"Australia"
] | 0 | closed choice | grade7 | social science | geography | Physical Geography | Oceans and continents | A continent is one of the major land masses on the earth. Most people say there are seven continents. | This continent is South America. | ||
Which country is highlighted? | [
"Samoa",
"the Marshall Islands",
"the Federated States of Micronesia",
"Papua New Guinea"
] | 2 | closed choice | grade6 | social science | geography | Oceania: geography | Identify and select countries of Oceania | This country is the Federated States of Micronesia. | |||
Not supported with pagination yet | What information supports the conclusion that Ling acquired this trait? | [
"Ling's scar was caused by an accident. She cut her arm when she fell off her bicycle.",
"Ling's sister has a bruise from falling on her elbow.",
"Ling's scar is on her right elbow. Her father also has a scar on his right elbow."
] | 0 | Read the description of a trait.
Ling has a scar on her right elbow. | closed choice | grade7 | natural science | biology | Genes to traits | Inherited and acquired traits: use evidence to support a statement | Organisms, including people, have both inherited and acquired traits. Inherited and acquired traits are gained in different ways.
Inherited traits are passed down from biological parents to their offspring through genes. Genes are pieces of hereditary material that contain the instructions that affect inherited traits.... | |
Not supported with pagination yet | How long is an adult great white shark? | [
"6 inches",
"6 yards",
"6 feet"
] | 1 | Select the best estimate. | closed choice | grade5 | natural science | units-and-measurement | Units and measurement | Choose customary units of distance | Measurements are written with both a number and a unit. The unit comes after the number. The unit shows what the number means.
When you are using customary units, length may be written with units of inches, feet, yards, or miles.
There are 12 inches in 1 foot, and 3 feet in 1 yard. There are 5,280 feet in 1 mile.
A foo... | The best estimate for the length of an adult great white shark is 6 yards.
6 inches and 6 feet are both too short. |
In this food chain, the algae is a producer. Why? | [
"It eats another living thing.",
"It makes its own food."
] | 1 | This diagram shows a food chain from Lake Superior, a freshwater ecosystem on the border of the United States and Canada. | closed choice | grade3 | natural science | biology | Ecosystems | Identify roles in food chains | Every living thing needs food to stay alive. Living things get their food in different ways. A food chain shows how living things in an ecosystem get their food.
Producers make their own food. Many producers use carbon dioxide, water, and sunlight to make sugar. This sugar is food for the producer.
Consumers eat other ... | In this food chain, the algae is a producer because it makes its own food. The algae uses carbon dioxide, water, and sunlight to make its own food. | |
Not supported with pagination yet | What information supports the conclusion that Melissa inherited this trait? | [
"Melissa's parents were born with wavy hair. They passed down this trait to Melissa.",
"Melissa and her mother both have short hair."
] | 0 | Read the description of a trait.
Melissa has wavy hair. | closed choice | grade6 | natural science | biology | Genes to traits | Inherited and acquired traits: use evidence to support a statement | Organisms, including people, have both inherited and acquired traits. Inherited and acquired traits are gained in different ways.
Inherited traits are passed down from biological parents to their offspring through genes. Genes are pieces of hereditary material that contain the instructions that affect inherited traits.... | |
Think about the magnetic force between the magnets in each pair. Which of the following statements is true? | [
"The magnitude of the magnetic force is the same in both pairs.",
"The magnitude of the magnetic force is greater in Pair 2.",
"The magnitude of the magnetic force is greater in Pair 1."
] | 1 | The images below show two pairs of magnets. The magnets in different pairs do not affect each other. All the magnets shown are made of the same material, but some of them are different shapes. | closed choice | grade6 | natural science | physics | Velocity, acceleration, and forces | Compare magnitudes of magnetic forces | Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart. These pulls and pushes between magnets are called magnetic forces.
The strength of a force is called its magnitude. The greater the magnitude of the magnetic force between two magnets,... | The magnets in Pair 2 attract. The magnets in Pair 1 repel. But whether the magnets attract or repel affects only the direction of the magnetic force. It does not affect the magnitude of the magnetic force.
Distance affects the magnitude of the magnetic force. When there is a smaller distance between magnets, the magni... | |
Not supported with pagination yet | Select the one animal that has all of the reptile traits listed above. | [
"Coral snakes hatch from eggs with shells. They spend most of their time underground or hiding under leaves. Coral snakes have scaly, waterproof skin.",
"Bengal tigers are one of the world's largest living cats. They have black, white, and orange fur. Female Bengal tigers feed their offspring milk. Male Bengal ti... | 0 | Reptiles are a group of animals with similar traits. The following traits can be used to identify reptiles:
They have scaly, waterproof skin.
They make eggs with shells. Observe the animals and read the descriptions. | closed choice | grade5 | natural science | biology | Classification | Use evidence to classify mammals, birds, fish, reptiles, and amphibians | Scientists sort animals with similar traits into groups. This is called classification. Classification helps scientists learn about how animals live.
How do scientists classify animals? First, they make observations about an animal. Scientists observe the animal's traits, including its body parts and behavior. Then, sc... | To decide if an animal is part of a group, look at the traits of the group.
Reptiles have the following traits:
They have scaly, waterproof skin.
They make eggs with shells.
Compare each animal's traits to the group's traits. Select the animal with traits similar to the group's traits.
A coral snake has the following t... |
Not supported with pagination yet | Does this passage describe the weather or the climate?
Southern California usually gets strong winds in the fall and winter. People call them Santa Ana winds. | [
"climate",
"weather"
] | 0 | Hint: Weather is what the atmosphere is like at a certain place and time. Climate is the pattern of weather in a certain place. | closed choice | grade4 | natural science | earth-science | Weather and climate | What's the difference between weather and climate? | The atmosphere is the layer of air that surrounds Earth. Both weather and climate tell you about the atmosphere.
Weather is what the atmosphere is like at a certain place and time. Weather can change quickly. For example, the temperature outside your house might get higher throughout the day.
Climate is the pattern of ... | Read the text carefully.
Southern California usually gets strong winds in the fall and winter. People call them Santa Ana winds.
This passage tells you about the usual wind pattern in Southern California. It does not describe what the weather is like on a particular day. So, this passage describes the climate. |
Not supported with pagination yet | What do these two changes have in common?
chicken cooking in an oven
making paper from wood | [
"Both are caused by cooling.",
"Both are caused by heating.",
"Both are only physical changes.",
"Both are chemical changes."
] | 3 | closed choice | grade8 | natural science | chemistry | Chemical reactions | Compare physical and chemical changes | Matter is made of very small particles called atoms. Atoms can be linked together by chemical bonds. When two or more atoms link together, they form a molecule.
In a chemical change, the chemical bonds in the molecules break. The atoms then link together to form different molecules. The types of molecules in matter bef... | Step 1: Think about each change.
Cooking chicken is a chemical change. The heat causes the matter in the chicken to change. Cooked chicken and raw chicken are different types of matter.
Making paper from wood is a chemical change. Paper is made by mixing tiny pieces of wood with special chemicals. The wood reacts with ... | |
What is the capital of New Mexico? | [
"Santa Fe",
"Jackson",
"Albuquerque",
"Arlington"
] | 0 | closed choice | grade3 | social science | geography | State capitals | Identify the 50 state capitals | Santa Fe is the capital of New Mexico. | |||
Not supported with pagination yet | What is the mass of an apple? | [
"110 kilograms",
"110 grams"
] | 1 | Select the better estimate. | closed choice | grade5 | natural science | units-and-measurement | Units and measurement | Choose metric units of mass | Measurements are written with both a number and a unit. The unit comes after the number. The unit shows what the number means.
Mass is a measurement of how much matter something contains.
There are many different units of mass. When you are using metric units, mass may be written with units of grams or kilograms.
There... | The better estimate for the mass of an apple is 110 grams.
110 kilograms is too heavy. |
Will these magnets attract or repel each other? | [
"repel",
"attract"
] | 0 | Two magnets are placed as shown. | closed choice | grade5 | natural science | physics | Magnets | Identify magnets that attract or repel | Magnets can pull or push on other magnets without touching them. When magnets attract, they pull together. When magnets repel, they push apart. These pulls and pushes are called magnetic forces.
Magnetic forces are strongest at the magnets' poles, or ends. Every magnet has two poles: a north pole (N) and a south pole (... | To predict if these magnets will attract or repel, look at which poles are closest to each other.
The north pole of one magnet is closest to the north pole of the other magnet. Like poles repel. So, these magnets will repel each other. | |
Not supported with pagination yet | Which closing is correct for a letter? | [
"See you soon,\nGabby",
"See You Soon,\nGabby"
] | 0 | closed choice | grade2 | language science | capitalization | Capitalization | Greetings and closings of letters | A letter starts with a greeting and ends with a closing. For each one, capitalize the first word and end with a comma. You should also capitalize proper nouns, such as Aunt Sue.
Dear Aunt Sue,
I'm glad you could come to my party, and
thank you for the birthday gift. I could not have
asked for a better one! Every time I... | The first closing is correct:
Its first word is capitalized, and it ends with a comma. | |
Select the mammal below. | [
"giraffe",
"cane toad"
] | 0 | Mammals have hair or fur and feed their young milk. A red howler is an example of a mammal. | closed choice | grade3 | natural science | biology | Classification | Identify mammals, birds, fish, reptiles, and amphibians | Birds, mammals, fish, reptiles, and amphibians are groups of animals. The animals in each group have traits in common.
Scientists sort animals into groups based on traits they have in common. This process is called classification. | A giraffe is a mammal. It has hair and feeds its young milk.
Giraffes eat mostly leaves that are too high up for other animals to reach.
A cane toad is an amphibian. It has moist skin and begins its life in water.
Toads do not have teeth! They swallow their food whole. | |
Is a door a solid or a liquid? | [
"a solid",
"a liquid"
] | 0 | closed choice | grade2 | natural science | physics | States of matter | Classify matter as solid or liquid | Solid and liquid are states of matter. Matter is anything that takes up space. Matter can come in different states, or forms.
When matter is a solid, it has a shape of its own.
Some solids can be bent or broken easily. Others are hard to bend or break.
A glass cup is a solid. A sock is also a solid.
When matter is a li... | A door is a solid. A solid has a size and shape of its own.
When you open or close a door, it keeps its shape. | ||
Which is the main persuasive appeal used in this ad? | [
"pathos (emotion)",
"ethos (character)",
"logos (reason)"
] | 2 | closed choice | grade7 | language science | writing-strategies | Persuasive strategies | Identify appeals to ethos, pathos, and logos in advertisements | The purpose of an advertisement is to persuade people to do something. To accomplish this purpose, advertisements use three types of persuasive strategies, or appeals:
Appeals to ethos, or character, show that the writer or speaker is trustworthy or is an authority on a subject. An ad that appeals to ethos might do one... | The ad appeals to logos, or reason. It mentions the results of studies and focuses on practical benefits of the product. | ||
Not supported with pagination yet | Would you find the word blouse on a dictionary page with the following guide words?
board - bundle | [
"yes",
"no"
] | 1 | yes or no | grade8 | language science | reference-skills | Reference skills | Use guide words | Guide words appear on each page of a dictionary. They tell you the first word and last word on the page. The other words on the page come between the guide words in alphabetical order.
To put words in alphabetical order, put them in order by their first letters. If the first letters are the same, look at the second let... | Put the words in alphabetical order.
Since blouse is not between the guide words board - bundle, it would not be found on that page. | |
Not supported with pagination yet | Which phrase has a more positive connotation? | [
"a nosy person",
"an inquisitive person"
] | 1 | closed choice | grade6 | language science | vocabulary | Shades of meaning | Positive and negative connotation | Connotation is the feeling or idea that goes along with a word or phrase. Some words are close in meaning but have different connotations.
For example, think about the words eager and impatient. They both mean wanting something to happen, but they have different connotations.
Eager has a positive connotation. It is a n... | An inquisitive person has a more positive connotation. Inquisitive and nosy both denote taking an interest in something. However, inquisitive suggests a healthy interest in learning more, while nosy suggests an inappropriate interest in other people's affairs. | |
Which country is highlighted? | [
"Kiribati",
"the Federated States of Micronesia",
"the Marshall Islands",
"Palau"
] | 1 | closed choice | grade8 | social science | geography | Oceania: geography | Identify and select countries of Oceania | This country is the Federated States of Micronesia. | |||
Not supported with pagination yet | Which figure of speech is used in this text?
After Wanda cooked and served a scrumptious dinner, Dad boasted that she is the Julia Child of our family. | [
"simile",
"allusion"
] | 1 | closed choice | grade8 | language science | figurative-language | Literary devices | Classify figures of speech | Figures of speech are words or phrases that use language in a nonliteral or unusual way. They can make writing more expressive.
Alliteration is the repetition of sounds at the beginning of nearby words.
What a lucky little lady you are!
An allusion is a brief reference to something or someone well known, often from his... | The text uses an allusion, a brief reference to someone or something well known.
Julia Child alludes to the famous chef who is known for popularizing French cuisine in the United States. | |
Not supported with pagination yet | Does this passage describe the weather or the climate?
The dry season in Emmett's hometown usually lasts from November to May. | [
"climate",
"weather"
] | 0 | Hint: Weather is what the atmosphere is like at a certain place and time. Climate is the pattern of weather in a certain place. | closed choice | grade4 | natural science | earth-science | Weather and climate | What's the difference between weather and climate? | The atmosphere is the layer of air that surrounds Earth. Both weather and climate tell you about the atmosphere.
Weather is what the atmosphere is like at a certain place and time. Weather can change quickly. For example, the temperature outside your house might get higher throughout the day.
Climate is the pattern of ... | Read the text carefully.
The dry season in Emmett's hometown usually lasts from November to May.
This passage tells you about the usual precipitation pattern where Emmett is from. It does not describe what the weather is like on a particular day. So, this passage describes the climate. |
Which of the following was a dependent variable in this experiment? | [
"the number of Giardia that remained in the water",
"the length of the filtering straw"
] | 0 | The passage below describes an experiment. Read the passage and think about the variables that are described.
Giardia is a microscopic parasite that lives in water and can infect humans. Dr. Lynch designed a drinking straw that contained a filter to remove Giardia from water. Dr. Lynch wanted to know if a longer filte... | closed choice | grade6 | natural science | science-and-engineering-practices | Designing experiments | Identify independent and dependent variables | Experiments have variables, or parts that change. You can design an experiment to find out how one variable affects another variable. For example, imagine that you want to find out if fertilizer affects the number of tomatoes a tomato plant grows. To answer this question, you decide to set up two equal groups of tomato... | ||
Will these magnets attract or repel each other? | [
"attract",
"repel"
] | 1 | Two magnets are placed as shown.
Hint: Magnets that attract pull together. Magnets that repel push apart. | closed choice | grade2 | natural science | physics | Magnets | Identify magnets that attract or repel | Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart.
Whether a magnet attracts or repels other magnets depends on the positions of its poles, or ends. Every magnet has two poles, called north and south.
Here are some examples of magnets.... | Will these magnets attract or repel? To find out, look at which poles are closest to each other.
The north pole of one magnet is closest to the north pole of the other magnet. Poles that are the same repel. So, these magnets will repel each other. | |
Not supported with pagination yet | Based on this information, what is this plant's phenotype for the fruit color trait? | [
"yellow fruit",
"red fruit"
] | 1 | In a group of tomato plants, some individuals have red fruit and others have yellow fruit. In this group, the gene for the fruit color trait has two alleles. The allele for red fruit (F) is dominant over the allele for yellow fruit (f).
A certain tomato plant from this group has the heterozygous genotype Ff for the fru... | closed choice | grade7 | natural science | biology | Genes to traits | Genetics vocabulary: dominant and recessive | All organisms have pieces of hereditary material called genes, which are passed from parents to offspring. Genes contain instructions for building the parts of an organism. An organism's genes affect its observable traits, including its appearance, its behavior, and which diseases it may have. Genes may have different ... | You need to determine the tomato plant's phenotype for the fruit color trait. First, consider the alleles in the plant's genotype for the fruit color gene. Then, decide whether these alleles are dominant or recessive.
The allele for red fruit (F) is dominant over the allele for yellow fruit (f). This means F is a domin... |
Think about the magnetic force between the magnets in each pair. Which of the following statements is true? | [
"The magnitude of the magnetic force is greater in Pair 2.",
"The magnitude of the magnetic force is greater in Pair 1.",
"The magnitude of the magnetic force is the same in both pairs."
] | 1 | The images below show two pairs of magnets. The magnets in different pairs do not affect each other. All the magnets shown are made of the same material, but some of them are different sizes. | closed choice | grade5 | natural science | physics | Magnets | Compare magnitudes of magnetic forces | Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart. These pulls and pushes between magnets are called magnetic forces.
The strength of a force is called its magnitude. The greater the magnitude of the magnetic force between two magnets,... | The magnets in Pair 2 attract. The magnets in Pair 1 repel. But whether the magnets attract or repel affects only the direction of the magnetic force. It does not affect the magnitude of the magnetic force.
Magnet sizes affect the magnitude of the magnetic force. Imagine magnets that are the same shape and made of the ... | |
Not supported with pagination yet | Which sentence is more formal? | [
"There are some things that Ms. Stevenson wants to bring up at the next city council meeting.",
"Ms. Stevenson has several important proposals to discuss at the next city council meeting."
] | 1 | closed choice | grade8 | language science | writing-strategies | Author's purpose and tone | Which sentence is more formal? | Formal writing is used for essays, business letters, and reports. The following types of informal language should be avoided in formal writing:
Type | Examples
slang | cool, awesome
idioms | knock your socks off
conversational language | gonna, kinda, yeah
abbreviated language | ASAP, FYI
overly simple or imprecise lan... | The second sentence is less formal. You can tell because it uses overly simple or imprecise language (some things, bring up).
The first sentence uses more precise language, so it is more formal overall. | |
Identify the question that Darell's experiment can best answer. | [
"Do steel nails rust in fewer days when submerged in a large volume of liquid compared to a small volume?",
"Do steel nails take fewer days to rust in water compared to vinegar?"
] | 1 | The passage below describes an experiment. Read the passage and then follow the instructions below.
Darell put one two-inch steel nail into each of six test tubes. He added water to three of the test tubes and vinegar to the other three. In each test tube, he completely covered the nail with the same volume of liquid.... | closed choice | grade7 | natural science | science-and-engineering-practices | Designing experiments | Identify the experimental question | Experiments can be designed to answer specific questions. How can you identify the questions that a certain experiment can answer? In order to do this, you need to figure out what was tested and what was measured during the experiment.
Imagine an experiment with two groups of daffodil plants. One group of plants was gr... | ||
Not supported with pagination yet | What is the mass of a skateboard? | [
"3 grams",
"3 kilograms"
] | 1 | Select the better estimate. | closed choice | grade5 | natural science | units-and-measurement | Units and measurement | Choose metric units of mass | Measurements are written with both a number and a unit. The unit comes after the number. The unit shows what the number means.
Mass is a measurement of how much matter something contains.
There are many different units of mass. When you are using metric units, mass may be written with units of grams or kilograms.
There... | The better estimate for the mass of a skateboard is 3 kilograms.
3 grams is too light. |
Not supported with pagination yet | Many people around the world celebrate the new year on January 1. But many other people celebrate the new year on different days. Why? | [
"They want to celebrate during summer.",
"They think celebrating on January 1 is bad luck.",
"They use different calendars.",
"They are confused about what day it is."
] | 2 | closed choice | grade3 | social science | culture | Cultural celebrations | Lunar New Year | People celebrate the new year on different days because they use different calendars.
Which calendars do people use? | ||
Which is this organism's common name? | [
"Cassiopea andromeda",
"upside-down jellyfish"
] | 1 | This organism is Cassiopea andromeda. It is also called an upside-down jellyfish. | closed choice | grade7 | natural science | biology | Classification and scientific names | Identify common and scientific names | An organism's common name is the name that people normally call the organism. Common names often contain words you know.
An organism's scientific name is the name scientists use to identify the organism. Scientific names often contain words that are not used in everyday English.
Scientific names are written in italics,... | Cassiopea andromeda is written in italics. The first word is capitalized, and the second word is not. So, it is the scientific name.
Cassiopea andromeda is the organism's scientific name. So, you know that upside-down jellyfish is the common name. |
Subsets and Splits
Validation Subject & Topic Summary
Reveals the distribution and count of images across different subjects, topics, and categories, highlighting the most prevalent combinations.
SQL Console for derek-thomas/ScienceQA
This query provides a balanced sample of entries across different topics where images are missing, allowing for a more representative analysis of text-only data.
SQL Console for derek-thomas/ScienceQA
This query provides a balanced sample of text entries across different topics, ensuring that each topic is proportionally represented, which is useful for further analysis or model training.
Random Sample by Topic Ratio
This query balances the dataset by randomly selecting a proportional number of items from each topic to create a balanced subset of 3000 items, revealing how well-represented each topic is in the dataset.
Topic Counts by Grade
Provides a breakdown of the number of questions by topic (physics, chemistry, biology, geography) for each grade level, revealing the distribution of question types.
Validation Category Counts
Counts the number of unique questions per category, helping to understand the distribution of questions across different categories.
SQL Console for derek-thomas/ScienceQA
Identifies categories, questions, and answers that appear more than four times in the validation dataset with images, highlighting common or repetitive entries.
ScienceQA Validation Grouped Data
Provides a count of images and overall occurrences for each combination of subject, topic, category, and answer, helping to identify popular or common configurations.
Train Data with Numeric Choices
This query identifies distinct rows in the dataset where one of the elements in the choices column contains a number and the image column is null, providing insight into data completeness and specific patterns in the choices.
Physics Train with Images and Lectures
Retrieves physics educational records with images and lectures for specific grade levels, providing basic filtering but offering limited analytical insight beyond data availability.
Physics Q&As with Images
Retrieves physics-related training examples with images for specific grade levels, providing basic filtered data but offering limited analytical insight beyond simple categorization.
Physics Questions Gr 2-6 With Images
Retrieves physics-related test items with images for specific grade levels, providing basic filtered data but offering limited analytical insights beyond simple data retrieval.
Filter Text-only Train Questions
Retrieves questions and related metadata from the dataset excluding those with images, offering basic data filtering.
Skills Without Images
Counts the number of skills where the image is missing, providing a basic overview of incomplete data.
Top 10 Hard Text Questions
Retrieves the top 10 longest questions without images, ordered by grade level in descending order, providing basic insight into potentially more complex questions.
SQL Console for derek-thomas/ScienceQA
Counts the occurrences of each category, question, and answer combination where an image is present, providing basic filtering on the dataset.
List ScienceQA Topics
Lists all unique topics in the dataset, which provides a basic overview of the categories present.
Cultural Questions Without Images
Retrieves 100 entries from the 'train' dataset where the image is missing and the topic is 'culture', providing basic filtering with limited analytical value.
Biology Skills for Grades 2 & 3
Lists unique skills and categories for biology topics in grades 2 and 3, providing basic filtering of the dataset.
Biology Qs for Grades 2 &
Retrieves all entries for grade 2 and grade 3 students focusing on the biology topic, providing a basic filtered view of the dataset.
Biology Grade 3 Questions Count
Counts the number of entries for grade 3 students in the biology topic, providing a basic count of data points.
Select Test Rows With Images
The query retrieves all records from the 'test' table where the 'image' column is not null, providing basic filtering without deep analytical value.
Test Images Query
This query retrieves a limited sample of rows where the image column is not null, providing basic filtering but minimal analytical value.
Test Data with Images
The query filters out rows where the image column is not null, providing a basic subset of the data but without much analytical insight.
Select Test Entries With Images
The query retrieves all records from the 'test' table where the 'image' column is not null, providing basic filtering but no deeper analytical insight.