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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Select the organism in the same genus as the Andean gull. | [
"Larus livens",
"Chroicocephalus serranus",
"Larus michahellis"
] | 1 | This organism is an Andean gull. Its scientific name is Chroicocephalus serranus. | closed choice | grade6 | natural science | biology | Classification and 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... | An Andean gull's scientific name is Chroicocephalus serranus. The first word of its scientific name is Chroicocephalus.
Larus livens is in the genus Larus. The first word of its scientific name is Larus. So, Larus livens and Chroicocephalus serranus are not in the same genus.
Larus michahellis is in the genus Larus. Th... | |
Which of the following fossils is older? Select the more likely answer. | [
"mammal tooth",
"ginkgo leaf"
] | 0 | This diagram shows fossils in an undisturbed sedimentary rock sequence. | closed choice | grade8 | natural science | earth-science | Fossils | Compare ages of fossils in a rock sequence | A fossil is the preserved evidence of an ancient organism. Some fossils are formed from body parts such as bones or shells. Other fossils, such as footprints or burrows, are formed from traces of an organism's activities.
Fossils are typically found in sedimentary rocks. Sedimentary rocks usually form in layers. Over t... | Look again at the fossils in the rock sequence diagram.
Compare the positions of these fossils to determine which one is older:
The mammal tooth fossil is in a deeper layer in the rock sequence than the ginkgo leaf fossil. So, the mammal tooth fossil is most likely older than the ginkgo leaf fossil. | |
Not supported with pagination yet | Based on this information, what is Wingding's genotype for the body feather color gene? | [
"green body feathers",
"BB"
] | 1 | In a group of budgerigar parakeets, some individuals have green body feathers and others have blue body feathers. In this group, the gene for the body feather color trait has two alleles. The allele B is for green body feathers, and the allele b is for blue body feathers.
Wingding, a budgerigar parakeet from this group... | closed choice | grade7 | 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 genotype for a gene is its combination of alleles for that gene. Wingding has two alleles for green body feathers (B). So, Wingding's genotype for the body feather color gene is BB. |
Which of these cities is marked on the map? | [
"Chicago",
"Cleveland",
"Indianapolis",
"St. Louis"
] | 1 | closed choice | grade5 | social science | geography | Cities | Cities of the Midwest | The city is Cleveland, Ohio. Chicago, Indianapolis, and St. Louis are marked with gray circles on the map below. | |||
Complete the statement.
Ruthenium is (). | [
"an elementary substance",
"a compound"
] | 0 | The model below represents ruthenium. thenium is a metal that is often used in the tips of fountain pens. | closed choice | grade8 | natural science | chemistry | Atoms and molecules | Classify elementary substances and compounds using models | There are more than 100 different chemical elements, or types of atoms. Chemical elements make up all of the substances around you.
A substance may be composed of one chemical element or multiple chemical elements. Substances that are composed of only one chemical element are elementary substances. Substances that are ... | Use the model to determine whether ruthenium is an elementary substance or a compound.
Step 1: Interpret the model.
In the space-filling model shown above, all of the balls are the same color:
. The legend shows that dark blue represents the chemical element with the atomic symbol Ru. So, the model shows you that ruthe... | |
Not supported with pagination yet | Which is a complex sentence? | [
"Before Melissa's birthday party, Franklin wrapped her present with delicate silver tissue paper.",
"Johnny picked raspberries in the field until his fingertips were stained red."
] | 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 second sentence is the complex sentence. It is made up of an independent clause and a dependent clause. The dependent clause begins with the subordinating conjunction until.
Johnny picked raspberries in the field until his fingertips were stained red. | |
Not supported with pagination yet | Which correctly shows the title of a book? | [
"Anne of Green Gables",
"Anne of green gables"
] | 0 | closed choice | grade4 | language science | capitalization | Formatting | Capitalizing titles | In a title, capitalize the first word, the last word, and every important word in between.
The Wind in the Willows James and the Giant Peach
These words are not important in titles:
Articles, a, an, the
Short prepositions, such as at, by, for, in, of, on, to, up
Coordinating conjunctions, such as and, but, or | Capitalize the first word, the last word, and every important word in between. The word of is not important, so it should not be capitalized.
The correct title is Anne of Green Gables. | |
Which of the following could Miranda's test show? | [
"how much the new turbine would weigh",
"if the new turbine could turn easily",
"whether the new turbine could produce 10% more electricity"
] | 2 | 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 | grade8 | 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 | What does the allusion in this text suggest?
With the gutters clogged and water rising in the streets, Ling, who was watching the storm from her window, commented, "We're going to need an ark to get out of here." | [
"Ling thinks the storm will cause major flooding.",
"Ling plans to build a boat."
] | 0 | closed choice | grade10 | 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.
An allusion is a brief reference to something or someone well known, often from history or literature.
"I'd better get home before I turn into a pumpkin!" Lila remarked. | The text uses an allusion, a brief reference to someone or something well known.
The allusion to an ark suggests that Ling thinks the storm will cause major flooding. In the Bible, it rains for forty days and forty nights; Noah, his family, and animals of every species survive the great flood in an ark that he builds. | |
Not supported with pagination yet | What information supports the conclusion that Jake acquired this trait? | [
"Jake learned to identify insects by reading many books about insects.",
"Jake likes to look at butterflies and beetles."
] | 0 | Read the description of a trait.
Jake is good at identifying insects. | closed choice | grade5 | natural science | biology | Traits and 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 | What do these two changes have in common?
acid rain weathering a marble statue
compost rotting | [
"Both are caused by heating.",
"Both are caused by cooling.",
"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.
Acid rain weathering a marble statue is a chemical change. The acid rain reacts with the outside of the statue and breaks it down into a different type of matter. This new matter is then washed away by the rain. Acid rain is a type of pollution. It forms when smoke from automobiles and ... | |
Not supported with pagination yet | Complete the sentence.
A penny tarnishing is a (). | [
"chemical change",
"physical change"
] | 0 | closed choice | grade3 | natural science | chemistry | Physical and chemical change | Identify physical and chemical changes | Chemical changes and physical changes are two common ways matter can change.
In a chemical change, the type of matter changes. The types of matter before and after a chemical change are always different.
Burning a piece of paper is a chemical change. When paper gets hot enough, it reacts with oxygen in the air and burn... | Metal turning less shiny over time is called tarnishing. A penny tarnishing is a chemical change. When air touches the penny, the surface of the penny changes into a different type of matter. This matter makes the penny dull. | |
Not supported with pagination yet | What do these two changes have in common?
an old sandwich rotting in a trashcan
plants making food from sunlight, air, and water | [
"Both are caused by heating.",
"Both are only physical changes.",
"Both are chemical changes.",
"Both are caused by cooling."
] | 2 | closed choice | grade4 | natural science | chemistry | Physical and chemical change | Compare physical and chemical changes | Chemical changes and physical changes are two common ways matter can change.
In a chemical change, the type of matter changes. The types of matter before and after a chemical change are always different.
Some chemical changes are caused by heating or cooling. For example, burning a piece of paper is a chemical change c... | Step 1: Think about each change.
A sandwich rotting is a chemical change. The matter in the sandwich breaks down and slowly turns into a different type of matter.
Plants making food is a chemical change. Plants use energy from sunlight to change air and water into food. The food is sugar. Sugar is a different type of m... | |
Is shale a mineral? | [
"yes",
"no"
] | 1 | Shale has the following properties:
naturally occurring
not a pure substance
not made by organisms
no fixed crystal structure
solid | yes or no | grade5 | natural science | earth-science | Rocks and minerals | Identify rocks and minerals | Properties are used to identify different substances. Minerals have the following properties:
It is a solid.
It is formed in nature.
It is not made by organisms.
It is a pure substance.
It has a fixed crystal structure.
If a substance has all five of these properties, then it is a mineral.
Look closely at the last thre... | Shale does not have all the properties of a mineral. So, shale is not a mineral. | |
Not supported with pagination yet | How long is a bike path? | [
"1 mile",
"1 foot"
] | 0 | Select the better estimate. | closed choice | grade2 | 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.
Imagine being told that a pencil is 8 long. You might be thinking, 8 what? Is the pencil 8 inches long? 8 feet? 8 miles?
The number 8 on its own does not give you much information about the len... | The better estimate for the length of a bike path is 1 mile.
1 foot is too short. |
Identify the question that Victoria's experiment can best answer. | [
"Do circuits that include iron produce dimmer light than circuits that include copper?",
"Can light bulbs stay lit longer when circuits include copper or when circuits include iron?"
] | 0 | The passage below describes an experiment. Read the passage and then follow the instructions below.
Victoria built an electric circuit: she used wires to connect a battery to a light bulb, the light bulb to a small piece of copper, and the copper back to the battery. When the circuit was complete, the light turned on.... | 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 | Is the following trait inherited or acquired?
Ezra has a scar on his left ankle. | [
"acquired",
"inherited"
] | 0 | closed choice | grade5 | 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... | Children do not inherit their parent's scars. Instead, scars are caused by the environment. People can get scars after they get hurt. So, having a scar is an acquired trait. | |
Not supported with pagination yet | Using only these supplies, which question can Belle investigate with an experiment? | [
"Does a rubber ball travel farther when launched from a metal catapult or from a wooden catapult?",
"Does a heavier ball travel farther than a lighter ball when launched from a catapult?",
"Does a catapult with a longer arm launch a rubber ball farther than a catapult with a shorter arm?"
] | 2 | Belle visits a museum about ancient Greece. She notices an exhibit with models of wooden catapults that were used to launch large rocks across battlefields. She wonders what factors affect how far a catapult can launch an object. So, she decides to design an experiment. She has the following supplies available:
a woode... | 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 | Is there a surplus or a shortage of leather jackets? | [
"surplus",
"shortage"
] | 0 | A store has 20 leather jackets for sale. Each jacket costs $70. At that price, 18 people want to buy one. | closed choice | grade5 | social science | economics | Supply and demand | Identify shortage and surplus | There is a surplus if there is too much for sale at a given price.
There is a shortage if there is not enough for sale at a given price.
Surpluses and shortages usually happen when people who are selling goods or services charge too much or too little.
When the price is too high, consumers will not want to buy much of ... | At the current price, there are too many jackets for sale. There are 20 jackets for sale, but only 18 people want to buy one.
So, there is a surplus of jackets. The store will not get any money for the leftover jackets. |
Select the bird below. | [
"American alligator",
"white stork"
] | 1 | Birds have feathers, two wings, and a beak. An ostrich is an example of a bird. | closed choice | grade2 | 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. | An American alligator is a reptile. It has scaly, waterproof skin.
A white stork is a bird. It has feathers, two wings, and a beak. | |
Which of these states is farthest east? | [
"Indiana",
"Iowa",
"South Carolina",
"Arizona"
] | 2 | 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 east arrow is pointing. South Carolina is farthest east. | ||
Not supported with pagination yet | Compare the motion of two speedboats. Which speedboat was moving at a higher speed? | [
"a speedboat that moved 665miles in 10hours",
"a speedboat that moved 595miles in 10hours"
] | 0 | closed choice | grade2 | 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 two objects movi... | Look at the distance each speedboat moved and the time it took to move that distance.
One speedboat moved 665 miles in 10 hours.
The other speedboat moved 595 miles in 10 hours.
Notice that each speedboat spent the same amount of time moving. The speedboat that moved 665 miles moved a farther distance in that time. So,... | |
Which trait does this red squirrel have? | [
"It has a bushy tail.",
"It has fins."
] | 0 | This image shows a Eurasian red squirrel. | closed choice | grade2 | natural science | literacy-in-science | Animals | Seed disperser: Eurasian red squirrel | |||
Not supported with pagination yet | Assume all other forces on Sophie are balanced. Which statement describes the forces on Sophie? | [
"The forces are balanced, so there is no net force on Sophie.",
"The forces are unbalanced, so there is a net force on Sophie."
] | 1 | Sophie is sitting on a roller coaster cart as it reaches the bottom of a big loop. Earth's gravity is pulling down on Sophie with a force of 600N. The seat of the cart is pushing up on Sophie with a force of 1,200N. | closed choice | grade8 | 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 Sophie, look at the forces:
Earth's gravity is pulling Sophie down with a force of 600 N.
The seat of the cart is pushing Sophie 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 for... |
Not supported with pagination yet | Complete the sentence.
Chemicals in a battery reacting to power a flashlight is a (). | [
"chemical change",
"physical change"
] | 0 | closed choice | grade5 | natural science | chemistry | Physical and chemical change | 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 new molecules. The types of molecules in matter before an... | Chemicals in a battery reacting to power a flashlight is a chemical change. When the flashlight is turned on, the chemicals in the battery react with each other to form new chemicals. This creates electricity, which powers the lightbulb. | |
Not supported with pagination yet | Based on this information, what is this ornamental gourd plant's genotype for the fruit color gene? | [
"yellow fruit",
"FF"
] | 1 | In a group of ornamental gourd plants, some individuals have yellow fruit and others have green fruit. In this group, the gene for the fruit color trait has two alleles. The allele F is for yellow fruit, and the allele f is for green fruit.
A certain ornamental gourd plant from this group has yellow fruit. This plant h... | 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 genotype for a gene is its combination of alleles for that gene. The ornamental gourd plant has two alleles for yellow fruit (F). So, the plant's genotype for the fruit color gene is FF. |
Not supported with pagination yet | Which online review is more formal? | [
"Although Pizza Pit isn't my favorite, their slices are certainly worth $1.50.",
"Pizza Pit isn't my fave, but their slices are definitely worth a buck and some change."
] | 0 | closed choice | grade11 | language science | writing-strategies | Audience, purpose, and tone | Which text is most formal? | Informal writing is typically used in casual situations or when communicating with someone you know well. Informal language often expresses familiarity and tends to sound more like speech. It uses more conversational language, such as slang, idioms, abbreviations, imprecise language, and contractions.
Formal writing is... | The second online review is more formal. The other online review uses slang (fave, a buck and some change) and sounds more casual. | |
Not supported with pagination yet | Which correctly shows the title of a book? | [
"\"Down by the River\"",
"***Down by the River***"
] | 1 | 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 book should be in italics.
The correct title is **Down by the River**. | |
Not supported with pagination yet | Which closing is correct for a letter? | [
"Your Friend,\nMaria",
"Your friend,\nMaria"
] | 1 | closed choice | grade3 | language science | punctuation | Formatting | 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. | |
Not supported with pagination yet | What kind of sentence is this?
Despite the frigid temperatures on the slopes, the junior class ski trip was an enormous success. | [
"declarative",
"interrogative",
"exclamatory"
] | 0 | closed choice | grade9 | language science | punctuation | Sentences, fragments, and run-ons | Is the sentence declarative, interrogative, imperative, or exclamatory? | There are four kinds of sentences.
A declarative sentence is a statement and always ends with a period.
The nurse told Mr. Abrams to roll up his sleeve so that she could check his blood pressure.
An imperative sentence makes a request or a demand and usually ends with a period. If a demand shows strong feeling, it can ... | The sentence is a statement and ends with a period. It is a declarative sentence. | |
Not supported with pagination yet | Is this a run-on sentence?
The Scythians were nomadic warriors who lived in Central Asia in the ninth century BCE, before disappearing during the second century CE, they had spread westward into Eastern Europe. | [
"no",
"yes"
] | 1 | yes or no | grade12 | language science | writing-strategies | Sentences, fragments, and run-ons | Identify run-on sentences | A sentence is a group of words that expresses a complete thought.
The band I'm in has been rehearsing daily because we have a concert in two weeks.
A run-on sentence is formed when two sentences are run together, joined by just a comma or by no punctuation at all. If only a comma is used, the run-on is called a comma s... | This is a run-on sentence. It is a comma splice formed from two sentences run together, joined by just a comma.
The Scythians were nomadic warriors who lived in Central Asia in the ninth century BCE, before disappearing during the second century CE, they had spread westward into Eastern Europe.
Here is one way to fix t... | |
Not supported with pagination yet | Does this passage describe the weather or the climate?
The air pressure is often low in Copenhagen, Denmark. | [
"climate",
"weather"
] | 0 | closed choice | grade5 | 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 air pressure is often low in Copenhagen, Denmark.
Air pressure is caused by the weight of the air in the atmosphere. When the air pressure is low, the sky is usually cloudy.
The passage tells you about the usual air pressure in Copenhagen. It does not describe what the weather is like on a ... | |
What is this lanternshark's scientific name? | [
"Etmopterus benchleyi",
"Etmopterus decacuspidatus"
] | 0 | This species of lanternshark was discovered in the eastern Pacific Ocean in 2015. It was named after Peter Benchley, the author of the novel Jaws. | closed choice | grade4 | natural science | biology | Scientific names | Origins of scientific names | When a scientist identifies a new organism, he or she chooses its scientific name.
Sometimes, an organism is named after the place where it was first found. Other times, an organism is named after the scientist who first identified it. Or, the scientific name might describe the organism's physical traits.
Many of the w... | This organism's scientific name refers to Peter Benchley.
The word benchleyi refers to Peter Benchley. So, this lanternshark's scientific name is Etmopterus benchleyi. | |
Not supported with pagination yet | Which is a compound sentence? | [
"The butcher cuts the fat off the meat.",
"Megan finished her book, but she got two more from the library."
] | 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 but.
Megan finished her book, but she got two more from the library. | |
Not supported with pagination yet | Which greeting is correct for a letter? | [
"Dear Uncle Fred,",
"dear Uncle Fred,"
] | 0 | closed choice | grade3 | language science | punctuation | Formatting | 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 greeting is correct:
Its first word is capitalized, and it ends with a comma. Uncle Fred is capitalized because it is a proper noun. | |
Which solution has a higher concentration of green particles? | [
"Solution A",
"neither; their concentrations are the same",
"Solution B"
] | 2 | The diagram below is a model of two solutions. Each green ball represents one particle of solute. | closed choice | grade7 | 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 green particles represent the solute. To figure out which solution has a higher concentration of green particles, look at both the number of green particles and the volume of the solvent in each container.
Use the concentration formula to find the number of green particles per millilit... | |
Not supported with pagination yet | Would you find the word neck on a dictionary page with the following guide words?
ninety - noon | [
"no",
"yes"
] | 0 | yes or no | 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 neck is not between the guide words ninety - noon, it would not be found on that page. | |
Not supported with pagination yet | Which logical fallacy is used in the text?
When Mason arrived at Heathrow Airport, a British man helped him retrieve his luggage from baggage claim. British people are all so nice! | [
"hasty generalization: a broad claim based on too few observations",
"bandwagon fallacy: the assumption that the popular choice is automatically correct",
"slippery slope fallacy: the false assumption that a small first step will lead to extreme consequences"
] | 0 | closed choice | grade12 | language science | writing-strategies | Developing and supporting arguments | Classify logical fallacies | A strong argument uses valid reasoning and logic in support of a claim. When an argument or claim introduces irrelevant information or misrepresents the issues at hand, it may be committing a logical fallacy. Logical fallacies can hurt a writer's credibility and can lead readers to draw false conclusions.
A logical fal... | The text argues that a single polite British person indicates that all British people are nice. However, this isn't necessarily true. This illustrates a type of logical fallacy known as a hasty generalization. | |
Which country is highlighted? | [
"Cuba",
"Saint Lucia",
"Saint Kitts and Nevis",
"Antigua and Barbuda"
] | 2 | closed choice | grade7 | social science | geography | The Americas: geography | Identify and select countries of the Caribbean | This country is Saint Kitts and Nevis. | |||
Not supported with pagination yet | Suppose Hector decides to go on the balloon race. Which result would be a cost? | [
"Hector will give up the chance to go on the roller coaster. He would have had more fun on that ride.",
"Hector will save some ride tickets. He needs fewer tickets to go on the balloon race than on the roller coaster."
] | 0 | Hector is deciding which ride to go on at the fair. He can go on either the roller coaster or the balloon race. He wants to have as much fun as possible at the fair. | closed choice | grade5 | 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 Hector wants or needs:
Hector will give up the chance to go on the roller coaster. He would have had more fun on that ride. |
What is the capital of South Dakota? | [
"Pierre",
"Hartford",
"Sioux Falls",
"Rapid City"
] | 0 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the Midwest | Pierre is the capital of South Dakota. | |||
Which continent is highlighted? | [
"North America",
"Europe",
"Africa",
"Antarctica"
] | 3 | closed choice | grade3 | social science | geography | Geography | Identify oceans and continents | A continent is one of the seven largest areas of land on earth. | This continent is Antarctica. | ||
Not supported with pagination yet | Use the evidence in the text to select the photosynthetic organism. | [
"Fantastic leaf-tailed geckos live in the forests of Madagascar. This type of gecko looks like a leaf, which helps it hide in the trees as it hunts its insect prey.",
"Lizard's tail plants are found throughout eastern North America. These plants use energy from sunlight to make their food."
] | 1 | closed choice | grade7 | natural science | biology | Photosynthesis | Identify the photosynthetic organism | Organisms that carry out photosynthesis are called photosynthetic organisms. During photosynthesis, these organisms use light energy, carbon dioxide, and water to produce sugars and oxygen.
Photosynthetic organisms also often have the following characteristics:
They are producers, which are organisms that make their ow... | This organism is photosynthetic:
The text tells you that lizard's tail plants use energy from sunlight to make food. This is evidence that the lizard's tail plant is a photosynthetic organism.
This organism is not photosynthetic:
The text does not provide evidence that the fantastic leaf-tailed gecko is photosynthetic. | |
Not supported with pagination yet | What information supports the conclusion that Trisha inherited this trait? | [
"Trisha and her father both have dark hair.",
"Trisha's parents have dark skin. They passed down this trait to Trisha."
] | 1 | Read the description of a trait.
Trisha has dark skin. | 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 kind of sentence is this?
In the game today, Mary hit a home run with bases loaded! | [
"declarative",
"interrogative",
"exclamatory"
] | 2 | closed choice | grade9 | language science | punctuation | Sentences, fragments, and run-ons | Is the sentence declarative, interrogative, imperative, or exclamatory? | There are four kinds of sentences.
A declarative sentence is a statement and always ends with a period.
The nurse told Mr. Abrams to roll up his sleeve so that she could check his blood pressure.
An imperative sentence makes a request or a demand and usually ends with a period. If a demand shows strong feeling, it can ... | The sentence is a statement that shows strong feeling and ends with an exclamation point. It is an exclamatory sentence. | |
Not supported with pagination yet | Which object has more thermal energy? | [
"a 700-gram rock at a temperature of 70°C",
"a 700-gram rock at a temperature of 45°C"
] | 0 | The objects are identical except for their temperatures. | closed choice | grade3 | natural science | physics | Heat and thermal energy | How is temperature related to thermal energy? | All solids, liquids, and gases are made of matter. Matter is made up of tiny particles that are always moving. The energy from the motion of these particles is called thermal energy.
Temperature measures how hot or cold matter is. If the particles in matter move faster, the temperature goes up. The matter now has both ... | The two rocks have the same mass but different temperatures. Since the 70°C rock is hotter than the 45°C rock, it has more thermal energy. |
Not supported with pagination yet | Which soap bubble has more thermal energy? | [
"the hotter soap bubble",
"the colder soap bubble"
] | 0 | Two soap bubbles are identical except for their temperatures. | closed choice | grade6 | natural science | physics | Thermal energy | How are temperature and mass related to thermal energy? | Matter is made of tiny particles called atoms. Atoms are always moving.
The energy of moving atoms is called thermal energy. The total amount of thermal energy in matter depends on three things: the type of matter, the amount of matter, and how fast the atoms are moving.
Temperature measures how hot or cold matter is. ... | The two soap bubbles are made of the same material and have the same mass. So, the hotter soap bubble has more thermal energy. |
Which country is highlighted? | [
"Tonga",
"Vanuatu",
"Solomon Islands",
"Fiji"
] | 3 | closed choice | grade8 | social science | geography | Oceania: geography | Identify and select countries of Oceania | This country is Fiji. | |||
Which solution has a higher concentration of purple particles? | [
"neither; their concentrations are the same",
"Solution A",
"Solution B"
] | 2 | The diagram below is a model of two solutions. Each purple 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 purple particles represent the solute. To figure out which solution has a higher concentration of purple particles, look at both the number of purple particles and the volume of the solvent in each container.
Use the concentration formula to find the number of purple particles per mill... | |
What can Damon and Bert trade to each get what they want? | [
"Bert can trade his broccoli for Damon's oranges.",
"Damon can trade his tomatoes for Bert's sandwich.",
"Damon can trade his tomatoes for Bert's broccoli.",
"Bert can trade his almonds for Damon's tomatoes."
] | 2 | Trade happens when people agree to exchange goods and services. People give up something to get something else. Sometimes people barter, or directly exchange one good or service for another.
Damon and Bert open their lunch boxes in the school cafeteria. Both of them could be happier with their lunches. Damon wanted bro... | closed choice | grade6 | social science | economics | Basic economic principles | Trade and specialization | Damon wanted broccoli in his lunch and Bert was hoping for tomatoes. Look at the labeled part of the images.
Damon has tomatoes. Bert has broccoli. They can trade tomatoes for broccoli to both be happier. Trading other things would not help either person get more items they want. | ||
Which better describes the Mount Rainier National Park ecosystem? | [
"It has long, cold winters. It also has soil that is poor in nutrients.",
"It has mostly small plants. It also has soil that is frozen year-round."
] | 0 | Figure: Mount Rainier National Park.
Mount Rainier National Park is a taiga ecosystem in Washington State. | 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 taiga is a type of ecosystem. Taigas have the following features: long, cold winters and short, cool summers, many evergreen trees, and soil that is poor in nutrients. So, Mount Rainier National Park has long, cold winters. It also has soil that is poor in nutrients. | |
Not supported with pagination yet | Select the invertebrate. | [
"birdwing butterfly",
"dwarf crocodile",
"rainbow trout",
"yak"
] | 0 | Hint: Insects, spiders, and worms are invertebrates. | closed choice | grade5 | natural science | biology | Classification | Identify vertebrates and invertebrates | Vertebrates and invertebrates are both groups of animals.
A vertebrate has a backbone. The backbone is made of many bones in an animal's back. A vertebrate's backbone helps connect the different parts of its body. In the drawings below, each vertebrate's backbone is colored orange.
An invertebrate does not have a backb... | A yak is a mammal. Like other mammals, a yak is a vertebrate. It has a backbone.
A birdwing butterfly is an insect. Like other insects, a birdwing butterfly is an invertebrate. It does not have a backbone. It has an exoskeleton.
A rainbow trout is a fish. Like other fish, a rainbow trout is a vertebrate. It has a backb... |
Not supported with pagination yet | What does the verbal irony in this text suggest?
"That fits you well," Brendan remarked after Eliana's cap fell over her eyes for the tenth time. | [
"The cap was too big.",
"The cap looked nice on Eliana."
] | 0 | closed choice | grade9 | 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.
Fits you well ironically suggests that the cap was too big. The cap was falling over Eliana's eyes, so it didn't fit her well at all. | |
Not supported with pagination yet | What is the volume of a bowl of soup? | [
"320 milliliters",
"320 liters"
] | 0 | Select the better estimate. | closed choice | grade4 | natural science | units-and-measurement | Units and measurement | Choose metric units of volume | Measurements are written with both a number and a unit. The unit comes after the number. The unit shows what the number means.
Volume is a measurement of how much space something takes up.
There are many different units of volume. When you are using metric units, volume may be written in units of milliliters or liters.... | The better estimate for the volume of a bowl of soup is 320 milliliters.
320 liters is too much. |
Which of these states is farthest north? | [
"Oregon",
"Utah",
"Louisiana",
"Georgia"
] | 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 north arrow is pointing. Oregon is farthest north. | ||
What is the capital of Indiana? | [
"Saint Paul",
"Indianapolis",
"Jackson",
"Fort Wayne"
] | 1 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the Midwest | Indianapolis is the capital of Indiana. | |||
Not supported with pagination yet | How long does it take to mow the lawn? | [
"34 minutes",
"34 hours"
] | 0 | Select the better estimate. | closed choice | grade2 | 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 mow the lawn is 34 minutes.
34 hours is too slow. |
Which country is highlighted? | [
"Haiti",
"the Dominican Republic",
"Jamaica",
"Cuba"
] | 0 | closed choice | grade6 | social science | geography | The Americas: geography | Identify and select countries of the Caribbean | This country is Haiti.
Does Haiti have any territorial disputes?
Haiti claims to own Navassa Island, which is a disputed territory. In other words, multiple countries or groups claim that the area rightfully belongs to them.
Navassa Island is also claimed by the United States. The United States claimed the island in 18... | |||
Will these magnets attract or repel each other? | [
"attract",
"repel"
] | 1 | Two magnets are placed as shown. | closed choice | grade4 | 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: north and south.
Here are some examples of magnets. The no... | To predict if these magnets will attract or repel, look at which poles are closest to each other.
The south pole of one magnet is closest to the south pole of the other magnet. Like poles repel. So, these magnets will repel each other. | |
What is the capital of Colorado? | [
"Boise",
"Olympia",
"Denver",
"Colorado Springs"
] | 2 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the West | Denver is the capital of Colorado. | |||
What is the capital of Oregon? | [
"Salem",
"Phoenix",
"Wichita",
"Salt Lake City"
] | 0 | closed choice | grade5 | social science | geography | State capitals | Identify the 50 state capitals | Salem is the capital of Oregon. | |||
Not supported with pagination yet | Which figure of speech is used in this text?
Tanvi asked her mother if she could adopt a cat, and her mother replied, "It's a definite maybe," so Tanvi didn't want to get her hopes up. | [
"oxymoron",
"hyperbole"
] | 0 | closed choice | grade11 | 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.
Definite maybe is a contradiction, because definite describes something that is sure, and maybe refers to something that is unsure. | |
Does this passage describe the weather or the climate? | [
"weather",
"climate"
] | 1 | Figure: Guam.
Guam is an island in the Pacific Ocean. It often experiences months of low pressure during the rainy season each year.
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 | grade6 | natural science | earth-science | Weather and climate | Weather and climate around the world | 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 passage carefully.
Guam is an island in the Pacific Ocean. It often experiences months of low pressure during the rainy season each year.
The underlined part of the passage tells you about the usual pattern of barometric pressure during the rainy season in Guam. This passage does not describe what the weather ... | |
Which continent is highlighted? | [
"Antarctica",
"Africa",
"Europe"
] | 2 | closed choice | grade2 | social science | geography | Geography | Identify oceans and continents | A continent is one of the seven largest areas of land on earth. | This continent is Europe. | ||
Which rhetorical appeal is primarily used in this ad? | [
"pathos (emotion)",
"ethos (character)",
"logos (reason)"
] | 0 | closed choice | grade12 | 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 the writer or speaker as trustworthy, authoritative, or sharing important values with the audience. An ad that appe... | The ad appeals to pathos, or emotion, by associating the product with feelings of ease and freedom from embarrassment. | ||
What can Monica and Troy trade to each get what they want? | [
"Monica can trade her tomatoes for Troy's broccoli.",
"Troy can trade his almonds for Monica's tomatoes.",
"Troy can trade his broccoli for Monica's oranges.",
"Monica can trade her tomatoes for Troy's sandwich."
] | 0 | Trade happens when people agree to exchange goods and services. People give up something to get something else. Sometimes people barter, or directly exchange one good or service for another.
Monica and Troy open their lunch boxes in the school cafeteria. Both of them could be happier with their lunches. Monica wanted b... | closed choice | grade6 | social science | economics | Basic economic principles | Trade and specialization | Monica wanted broccoli in her lunch and Troy was hoping for tomatoes. Look at the labeled part of the images.
Monica has tomatoes. Troy has broccoli. They can trade tomatoes for broccoli to both be happier. Trading other things would not help either person get more items they want. | ||
Not supported with pagination yet | What kind of sentence is this?
Please give me the contact information for that physician you recommended. | [
"imperative",
"exclamatory",
"interrogative"
] | 0 | closed choice | grade6 | language science | punctuation | Sentences, fragments, and run-ons | Is the sentence declarative, interrogative, imperative, or exclamatory? | There are four kinds of sentences.
A declarative sentence is a statement, and it always ends with a period.
The nurse told Mr. Abrams to roll up his sleeve so that she could check his blood pressure.
An interrogative sentence is a question, and it always ends with a question mark.
Do you have any plans for the upcoming... | The sentence makes a request, so it is an imperative sentence. Here, it ends with a period. | |
What is the capital of Utah? | [
"Phoenix",
"Provo",
"Juneau",
"Salt Lake City"
] | 3 | closed choice | grade3 | social science | geography | State capitals | Identify the 50 state capitals | Salt Lake City is the capital of Utah. | |||
Not supported with pagination yet | Which type of sentence is this?
Bonnie is a competitive horseback rider, and she will be competing in the next World Equestrian Games, which are held every four years. | [
"compound",
"simple",
"complex",
"compound-complex"
] | 3 | closed choice | grade7 | 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.
Bonnie is a competitive horseback rider, and she will be competing in the next World Equestrian Games, which are held every four years. | |
Is an eggshell a mineral? | [
"no",
"yes"
] | 0 | An eggshell has the following properties:
crystal structure is rarely fixed
not a pure substance
made by an animal
solid
found in nature | yes or no | grade5 | natural science | earth-science | Rocks and minerals | Identify rocks and minerals | Properties are used to identify different substances. Minerals have the following properties:
It is a solid.
It is formed in nature.
It is not made by organisms.
It is a pure substance.
It has a fixed crystal structure.
If a substance has all five of these properties, then it is a mineral.
Look closely at the last thre... | An eggshell does not have all the properties of a mineral. So, an eggshell is not a mineral. | |
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 smaller in Pair 1.",
"The magnitude of the magnetic force is the same in both pairs.",
"The magnitude of the magnetic force is smaller in Pair 2."
] | 0 | 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 | grade8 | 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,... | Distance affects the magnitude of the magnetic force. When there is a greater distance between magnets, the magnitude of the magnetic force between them is smaller.
There is a greater distance between the magnets in Pair 1 than in Pair 2. So, the magnitude of the magnetic force is smaller in Pair 1 than in Pair 2. | |
Not supported with pagination yet | Based on this information, what is this cucumber plant's genotype for the fruit sheen gene? | [
"dull fruit",
"Ff"
] | 1 | In a group of cucumber plants, some individuals have dull fruit and others have glossy fruit. In this group, the gene for the fruit sheen trait has two alleles. The allele F is for dull fruit, and the allele f is for glossy fruit.
A certain cucumber plant from this group has dull fruit. This plant has one allele for du... | closed choice | grade8 | 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 genotype for a gene is its combination of alleles for that gene. The cucumber plant has one allele for dull fruit (F) and one allele for glossy fruit (f). So, the plant's genotype for the fruit sheen gene is Ff. |
Which of the following was a dependent variable in this experiment? | [
"the temperature at the hill",
"the distance the sled traveled across the flat field"
] | 1 | The passage below describes an experiment. Read the passage and think about the variables that are described.
Sanjay heard that when it was cold outside, a sled would travel farther after it got to the bottom of a hill. To test this idea, Sanjay headed to the sledding hill near his house on a cold winter morning.
When... | 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... | ||
Not supported with pagination yet | Which letter opening is more formal? | [
"Dear Mark,",
"Dear Mr. Everett,"
] | 1 | closed choice | grade12 | language science | writing-strategies | Audience, purpose, and tone | Which text is most formal? | Informal writing is typically used in casual situations or when communicating with someone you know well. Informal language often expresses familiarity and tends to sound more like speech. It uses more conversational language, such as slang, idioms, abbreviations, imprecise language, and contractions.
Formal writing is... | The first letter opening is more formal. It uses the recipient's personal title and last name. The other opening uses the recipient's first name, suggesting a more familiar relationship. | |
Not supported with pagination yet | Is the following trait inherited or acquired?
Beth has a scar on her left hand. | [
"acquired",
"inherited"
] | 0 | Hint: Most scars are caused by accidents during a person's life. | 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... | Children do not inherit their parent's scars. Instead, scars are caused by the environment. People can get scars after they get hurt. So, having a scar is an acquired trait. |
Not supported with pagination yet | Each bus takes the same amount of time to stop. Which school bus needs a larger force to come to a stop? | [
"a school bus carrying 800 pounds",
"a school bus carrying 600 pounds"
] | 0 | Kids from two different schools are riding their school buses home. The buses are the same. They are going the same speed. But different numbers of kids are riding in each bus. | 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 school bus that is heavier.
A school bus carrying 800 pounds is heavier than a school bus carrying 600 pounds. So, the school bus carrying 800 pounds needs a larger force to come to a stop in the same amount of time as the other bus. |
Not supported with pagination yet | What is the volume of a large soup pot? | [
"9 milliliters",
"9 liters"
] | 1 | Select the better estimate. | closed choice | grade5 | natural science | units-and-measurement | Units and measurement | Choose metric units of volume | Measurements are written with both a number and a unit. The unit comes after the number. The unit shows what the number means.
Volume is a measurement of how much space something takes up.
There are many different units of volume. When you are using metric units, volume may be written in units of milliliters or liters.... | The better estimate for the volume of a large soup pot is 9 liters.
9 milliliters is too little. |
Is silicon a mineral? | [
"yes",
"no"
] | 1 | Silicon has the following properties:
pure substance
solid
fixed crystal structure
made in a factory | yes or no | grade6 | natural science | earth-science | Rocks and minerals | Identify rocks and minerals | Properties are used to identify different substances. Minerals have the following properties:
It is a solid.
It is formed in nature.
It is not made by organisms.
It is a pure substance.
It has a fixed crystal structure.
If a substance has all five of these properties, then it is a mineral.
Look closely at the last thre... | To make pure silicon, the substances in these compounds must be separated from each other. This can be done by heating the compounds to very high temperatures in a special oven called an electric arc furnace. | |
Which property do these two objects have in common? | [
"breakable",
"smooth"
] | 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 breakable object will break into pieces if you drop it. The car bumper is not breakable.
A smooth object is not scratchy or rough. Both objects are smooth.
The property that both objects have in common is smooth. | |
Which continent is highlighted? | [
"Africa",
"Antarctica",
"South America",
"Europe"
] | 2 | closed choice | grade6 | 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. | ||
Compare the average kinetic energies of the particles in each sample. Which sample has the higher temperature? | [
"sample A",
"neither; the samples have the same temperature",
"sample B"
] | 0 | 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 | grade8 | 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 | Which word would you find on a dictionary page with the following guide words?
patience - proceed | [
"push",
"platform"
] | 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 platform is between the guide words patience - proceed, it would be found on that page. | |
Not supported with pagination yet | Which type of sentence is this?
An avid reader, Franklin attends weekly book club meetings, and he finishes several novels every month. | [
"compound-complex",
"compound",
"complex",
"simple"
] | 1 | closed choice | grade12 | 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. It is made up of two independent clauses joined by the coordinating conjunction and.
An avid reader, Franklin attends weekly book club meetings, and he finishes several novels every month. | |
Which type of force from the tow truck moves the car down the road? | [
"push",
"pull"
] | 1 | Tow trucks can move cars from one place to another. This tow truck applies a force to a car to move it down the road. | closed choice | grade3 | natural science | physics | Force and motion | Identify pushes and pulls | A force is a push or a pull that one object applies to a second object.
The direction of a push is away from the object that is pushing.
The direction of a pull is toward the object that is pulling. | The tow truck applies a force to the car. This force moves the car down the road. The direction of this force is toward the tow truck. This force is a pull. | |
Not supported with pagination yet | Which is a compound sentence? | [
"I feel tired and hot, but I don't have a fever.",
"Layla will change the batteries in the radio tomorrow."
] | 0 | closed choice | grade4 | 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 second sentence is the compound sentence. It is made up of two simple sentences joined by a comma and the conjunction but.
I feel tired and hot, but I don't have a fever. | |
What is the name of the colony shown? | [
"North Carolina",
"Washington, D.C.",
"Iowa",
"Maryland"
] | 3 | closed choice | grade8 | social science | us-history | Colonial America | Identify the Thirteen Colonies | The colony is Maryland. | |||
Not supported with pagination yet | Select the vertebrate. | [
"Tasmanian devil",
"bull ant"
] | 0 | Hint: Mammals, birds, fish, reptiles, and amphibians are vertebrates. | closed choice | grade3 | natural science | biology | Classification | Identify vertebrates and invertebrates | Vertebrates and invertebrates are both groups of animals.
A vertebrate has a backbone. The backbone is made of many bones in an animal's back. A vertebrate's backbone helps connect the different parts of its body. In the drawings below, each vertebrate's backbone is colored orange.
An invertebrate does not have a backb... | A bull ant is an insect. Like other insects, a bull ant is an invertebrate. It does not have a backbone. It has a hard outer cover.
A Tasmanian devil is a mammal. Like other mammals, a Tasmanian devil is a vertebrate. It has a backbone. |
What is the capital of Wyoming? | [
"Albuquerque",
"Cheyenne",
"Olympia",
"Madison"
] | 1 | closed choice | grade3 | social science | geography | State capitals | Identify the 50 state capitals | Cheyenne is the capital of Wyoming. | |||
Not supported with pagination yet | Select the one true statement. | [
"Mitochondria are outside the nucleus of an animal cell.",
"Animal cells can have lysosomes but do not have vacuoles.",
"The vacuoles of plant cells use sunlight to make sugar."
] | 0 | closed choice | grade7 | natural science | biology | Cells | Compare cells and cell parts | |||
Which of these states is farthest north? | [
"West Virginia",
"New Mexico",
"South Carolina",
"Louisiana"
] | 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 north arrow is pointing. West Virginia is farthest north. | ||
Which of these continents does the prime meridian intersect? | [
"Australia",
"Europe",
"North America"
] | 1 | closed choice | grade5 | social science | geography | Maps | Use lines of latitude and longitude | Lines of latitude and lines of longitude are imaginary lines drawn on some globes and maps. They can help you find places on globes and maps.
Lines of latitude show how far north or south a place is. We use units called degrees to describe how far a place is from the equator. The equator is the line located at 0° latit... | The prime meridian is the line at 0° longitude. It intersects Europe. It does not intersect Australia or North America. | ||
Think about the magnetic force between the magnets in each pair. Which of the following statements is true? | [
"The magnetic force is stronger in Pair 2.",
"The strength of the magnetic force is the same in both pairs.",
"The magnetic force is stronger in Pair 1."
] | 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 | grade4 | natural science | physics | Magnets | Compare strengths 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 stronger the magnetic force between two magnets, the more strongly the magnets attract or repel each other.
You c... | Distance affects the strength of the magnetic force. When magnets are closer together, the magnetic force between them is stronger.
The magnets in Pair 1 are closer together than the magnets in Pair 2. So, the magnetic force is stronger in Pair 1 than in Pair 2. | |
Not supported with pagination yet | What kind of sentence is this?
The European Space Agency's Philae lander was the first spacecraft to successfully land on the surface of a comet. | [
"declarative",
"exclamatory",
"interrogative"
] | 0 | closed choice | grade9 | language science | punctuation | Sentences, fragments, and run-ons | Is the sentence declarative, interrogative, imperative, or exclamatory? | There are four kinds of sentences.
A declarative sentence is a statement and always ends with a period.
The nurse told Mr. Abrams to roll up his sleeve so that she could check his blood pressure.
An imperative sentence makes a request or a demand and usually ends with a period. If a demand shows strong feeling, it can ... | The sentence is a statement and ends with a period. It is a declarative sentence. | |
Which continent was involved in the Seven Years' War? | [
"Australia",
"Europe"
] | 1 | The French and Indian War took place in North America in the 1750s and 1760s. That war was part of a much larger conflict known as the Seven Years' War. The map below highlights the countries and territories that fought in the Seven Years' War. Use the map to answer the question below. | closed choice | grade8 | social science | us-history | The American Revolution | Causes of the American Revolution: the French and Indian War | Look at the map.
The map shows that the conflict involved countries and territories throughout South America, Africa, North America, Asia, and Europe. The only continents not involved were Australia, where no Europeans had settled, and Antarctica, where no humans lived.
The French and Indian War was part of a global wa... | ||
Not supported with pagination yet | Which of the following contains a vague pronoun reference? | [
"John gave Fred a beautifully bound copy of One Hundred Years of Solitude, which is his favorite book.",
"John gave a beautifully bound copy of his favorite book, One Hundred Years of Solitude, to Fred."
] | 0 | closed choice | grade10 | language science | writing-strategies | Pronouns | 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 first answer choice contains a vague pronoun reference. The pronoun his could refer to John or Fred.
John gave Fred a beautifully bound copy of One Hundred Years of Solitude, which is his favorite book.
The second answer choice shows a possible correction for the vague pronoun reference. The text has been rewritten... | |
Which animal is also adapted to be camouflaged among green leaves? | [
"green mantis",
"Namaqua chameleon"
] | 0 | Leaf insects live in the forests of Asia and Australia. The is adapted to be camouflaged among green leaves.
Figure: leaf insect. | 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 leaf insect.
The leaf insect has a green leaf-shaped body. It is adapted to be camouflaged among green leaves. The word camouflage means to blend in.
Now look at each animal. Figure out which animal has a similar adaptation.
The green mantis has a green body. It is adapted to be camouflaged a... | |
Not supported with pagination yet | Which word does not rhyme? | [
"trade",
"slide",
"fade"
] | 1 | closed choice | grade2 | language science | phonological-awareness | Rhyming | Which word does not rhyme? | Rhyming words are words that end with the same sound.
The words tip and slip rhyme. They both end with the same sound.
The words meet and treat also rhyme. They both end with the same sound, even though the sound has two different spellings.
The words tip and meet don't rhyme. They end with different sounds. | The words fade and trade rhyme. They both end with the ade sound.
The word slide does not rhyme. It ends with a different sound. | |
Select the fish below. | [
"tortoise",
"ostrich",
"piranha",
"African bullfrog"
] | 2 | Fish live underwater. They have fins, not limbs.
Fish are cold-blooded. The body temperature of cold-blooded animals depends on their environment.
A bull shark is an example of a fish. | closed choice | grade4 | natural science | biology | Classification | Identify mammals, birds, fish, reptiles, and amphibians | Birds, mammals, fish, reptiles, and amphibians are groups of animals. Scientists sort animals into each group based on traits they have in common. This process is called classification.
Classification helps scientists learn about how animals live. Classification also helps scientists compare similar animals. | An African bullfrog is an amphibian. It has moist skin and begins its life in water.
Frogs live near water or in damp places. Most frogs lay their eggs in water.
A piranha is a fish. It lives underwater. It has fins, not limbs.
Piranhas have sharp teeth. Piranhas hunt in groups. A group of piranhas can eat a large anim... | |
Not supported with pagination yet | Would you find the word curtain on a dictionary page with the following guide words?
climb - colt | [
"yes",
"no"
] | 1 | yes or no | grade2 | 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 curtain is not between the guide words climb - colt, it would not be found on that page. | |
Not supported with pagination yet | Which tense does the sentence use?
The man glances at his watch. | [
"past tense",
"future tense",
"present tense"
] | 2 | closed choice | grade3 | 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, glances. The verb ends in -s and tells you about something that is true or happening now. |
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.