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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Not supported with pagination yet | Which of the following contains a vague pronoun reference? | [
"Tommy and his best friend go to the same college, but he is graduating this coming June.",
"Tommy and his best friend go to the same college, but Tommy is graduating this coming June."
] | 0 | 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 he could refer to Tommy or his best friend.
The first answer choice shows a possible correction for the vague pronoun reference. He has been replaced with Tommy.
Tommy and his best friend go to the same college, but Tommy is graduating this coming... | |
Which type of relationship is formed when a flea feeds on a dog's blood? | [
"mutualistic",
"parasitic",
"commensal"
] | 1 | Read the passage. Then answer the question.
Fleas are small insects that can feed on the blood of mammals, including dogs. A flea uses its specialized mouth to pierce a dog's skin and suck the dog's blood. The flea can drink up to 15 times its body weight in blood each day!
When the flea feeds on the dog's blood, the ... | closed choice | grade7 | natural science | biology | Ecological interactions | Classify symbiotic relationships | When two organisms of different species interact in a way that affects one or both organisms, they form a symbiotic relationship. The word symbiosis comes from a Greek word that means living together. Scientists define types of symbiotic relationships based on how each organism is affected.
This table lists three commo... | When a flea feeds on a dog's blood, the flea gets the food it needs to survive and grow. So, the flea benefits from its relationship with the dog.
The dog's skin is irritated by the flea's saliva, and the flea can transmit diseases to the dog. So, the dog is harmed by its relationship with the flea.
Since the flea bene... | |
Not supported with pagination yet | Which of the following contains a vague pronoun reference? | [
"\"This morning, the newspaper said that Bella Holland won the mayoral election in Westminster,\" Tim remarked to his sister.",
"\"This morning, it said that Bella Holland won the mayoral election in Westminster,\" Tim remarked to his sister."
] | 1 | 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 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 newspaper.
"This morning, the newspaper said that Bella Holland won the mayoral election in Westm... | |
Not supported with pagination yet | Which figure of speech is used in this text?
In May 2014, when wildfires threatened parts of San Diego County in California, firefighters worked around the clock in an effort to control the blaze. | [
"idiom",
"verbal irony"
] | 0 | closed choice | grade10 | language science | figurative-language | Literary devices | Classify figures of speech: review | 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 idiom, an expression that cannot be understood literally.
Around the clock means all day and night without stopping. | |
Not supported with pagination yet | What information supports the conclusion that Nicholas acquired this trait? | [
"Nicholas learned how to build a fire at summer camp.",
"Nicholas can cook food over a fire."
] | 0 | Read the description of a trait.
Nicholas knows how to build a fire. | closed choice | grade4 | 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... | |
Which property do these three objects have in common? | [
"rough",
"blue",
"bouncy"
] | 1 | Select the best answer. | closed choice | grade3 | 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. | Look at each object.
For each object, decide if it has that property.
A rough object feels scratchy when you touch it. None of the objects are rough.
A bouncy object will bounce back from the floor if you drop it. The ceramic mug and the feather are not bouncy.
Blue is a color.
This color is blue. All three objects are... | |
What is the capital of Washington? | [
"Spokane",
"Seattle",
"Olympia",
"Denver"
] | 2 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the West | Olympia is the capital of Washington. | |||
Not supported with pagination yet | Which is a compound sentence? | [
"In 1900, the U.S. state with the largest population was New York.",
"First, Dean planted the geraniums in a clay pot, and then he placed the pot on a sunny windowsill in his kitchen."
] | 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 compound sentence. It is made up of two independent clauses joined by the coordinating conjunction and.
First, Dean planted the geraniums in a clay pot, and then he placed the pot on a sunny windowsill in his kitchen. | |
Not supported with pagination yet | Is the following trait inherited or acquired?
Gabriel has naturally curly hair. | [
"inherited",
"acquired"
] | 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... | Some humans are born with naturally curly hair. Others are born with naturally straight hair. Curly and straight are examples of hair texture.
Some people decide to change how their hair looks. But this doesn't affect the natural texture of their hair. So, having naturally curly hair is an inherited trait. | |
What is the capital of Arkansas? | [
"Little Rock",
"Burlington",
"Fayetteville",
"Fort Wayne"
] | 0 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the Southeast | Little Rock is the capital of Arkansas. | |||
Not supported with pagination yet | What information supports the conclusion that Grace inherited this trait? | [
"Grace and her mother both have short hair.",
"Grace's parents were born with wavy hair. They passed down this trait to Grace."
] | 1 | Read the description of a trait.
Grace 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... | |
Think about the magnetic force between the magnets in each pair. Which of the following statements is true? | [
"The strength of the magnetic force is the same in both pairs.",
"The magnetic force is stronger in Pair 1.",
"The magnetic force is stronger in Pair 2."
] | 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. | closed choice | grade3 | 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. | |
What is the capital of Wyoming? | [
"Carson City",
"Laramie",
"Santa Fe",
"Cheyenne"
] | 3 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the West | Cheyenne is the capital of Wyoming. | |||
Which better describes the Kibale National Forest ecosystem? | [
"It has cold winters. It also has soil that is rich in nutrients.",
"It has year-round rain. It also has soil that is poor in nutrients."
] | 1 | Figure: Kibale National Forest.
Kibale National Forest is a tropical rain forest ecosystem in Uganda, a country in eastern Africa. | 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 tropical rain forest is a type of ecosystem. Tropical rain forests have the following features: year-round rain and warm temperatures, soil that is poor in nutrients, and many different types of organisms. So, Kibale National Forest has year-round rain. It also has soil that is poor in nutrients. | |
Not supported with pagination yet | Select the one substance that is not a mineral. | [
"Celestine is a solid. It is formed in nature.",
"A sunflower seed is not a pure substance. It is a solid.",
"Pyrite is a solid. It is not made by living things."
] | 1 | closed choice | grade4 | natural science | earth-science | Rocks and minerals | Identify minerals using properties | Minerals are the building blocks of rocks. A rock can be made of one or more minerals.
Minerals and rocks have the following properties:
Property | Mineral | Rock
It is a solid. | Yes | Yes
It is formed in nature. | Yes | Yes
It is not made by organisms. | Yes | Yes
It is a pure substance. | Yes | No
It has a fixed cry... | Compare the properties of each substance to the properties of minerals. Select the substance whose properties do not match those of minerals.
A sunflower seed is not a pure substance. But all minerals are pure substances.
So, a sunflower seed is not a mineral.
Pyrite is a mineral.
Celestine is a mineral. | |
Which of the following could Britney's test show? | [
"whether the new turbine could produce 10% more electricity",
"how much the new turbine would weigh",
"if the new turbine could turn easily"
] | 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 | 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... | ||
Is a marble 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 marble is a solid. A solid has a size and shape of its own.
A marble can be made of clear or colored glass. | ||
Not supported with pagination yet | Which of the following contains a vague pronoun reference? | [
"The GPS said to turn left at the fork and then continue straight for three miles.",
"It said to turn left at the fork and then continue straight for three miles."
] | 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 first answer choice contains a vague pronoun reference. The pronoun it is used without its antecedent.
The second answer choice shows a possible correction for the vague pronoun reference. It has been replaced with the GPS.
The GPS said to turn left at the fork and then continue straight for three miles. | |
Will these magnets attract or repel each other? | [
"repel",
"attract"
] | 0 | 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 south pole of one magnet is closest to the south pole of the other magnet. Poles that are the same repel. So, these magnets will repel each other. | |
Not supported with pagination yet | What is the volume of a bowl of soup? | [
"9 fluid ounces",
"9 gallons",
"9 cups"
] | 0 | Select the best estimate. | closed choice | grade5 | natural science | units-and-measurement | Units and measurement | Choose customary 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 customary units, volume may be written in units of fluid ounces, cups,... | The best estimate for the volume of a bowl of soup is 9 fluid ounces.
9 cups and 9 gallons are both too much. |
What is the capital of South Dakota? | [
"Pierre",
"Sioux Falls",
"Rapid City",
"Dover"
] | 0 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the Midwest | Pierre is the capital of South Dakota. | |||
Complete the sentence.
Pollen helps a plant (). | [
"make flowers",
"grow roots",
"make seeds"
] | 2 | The male part of a flower makes pollen. | closed choice | grade4 | natural science | biology | Plants | Describe and construct flowering plant life cycles | Many plants have flowers. These plants can use their flowers to reproduce, or make new plants like themselves. How do plants use their flowers to reproduce?
First, the male part of the flower makes pollen, and the female part makes eggs. Animals, wind, or water can move pollen. Pollination is what happens when pollen i... | Pollen helps the flower make seeds. After pollination, sperm cells from the pollen can combine with the eggs. These fertilized eggs can grow into seeds.
Pollen does not help a plant make flowers or grow roots. | |
What is the capital of Pennsylvania? | [
"Pittsburgh",
"Harrisburg",
"Philadelphia",
"Plymouth"
] | 1 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the Northeast | Harrisburg is the capital of Pennsylvania. | |||
Not supported with pagination yet | Complete the sentence.
Mixing glue and laundry powder to create putty is a (). | [
"chemical change",
"physical change"
] | 0 | closed choice | grade6 | 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 new molecules. The types of molecules in matter before an... | Mixing glue and laundry powder to create putty is a chemical change. The putty is a different type of matter that was not there before the change. | |
Which property do these three objects have in common? | [
"bumpy",
"colorful",
"translucent"
] | 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 bumpy object is covered in lumps and bumps. The icicle is bumpy, but the marbles are not.
A translucent object lets light through. But you cannot see clearly through a translucent object. All three objects are translucent.
A colorful object has one... | |
Which property do these three objects have in common? | [
"bouncy",
"scratchy",
"flexible"
] | 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 flexible object can be folded or bent without breaking easily. All three objects are flexible.
A scratchy object is rough and itchy against your skin. The wool sweater is scratchy, but the tape and the silk tie are not.
A bouncy object will bounce ... | |
What is the name of the colony shown? | [
"Wisconsin",
"Virginia",
"Pennsylvania",
"West Virginia"
] | 1 | closed choice | grade8 | social science | us-history | Colonial America | Identify the Thirteen Colonies | The colony is Virginia.
The Virginia Colony included land that would later become part of the state of West Virginia. West Virginia was never its own colony. | |||
Which of these states is farthest east? | [
"Michigan",
"Washington",
"California",
"South Dakota"
] | 0 | 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. Michigan is farthest east. | ||
Which of these cities is marked on the map? | [
"New Orleans",
"Houston",
"Dallas",
"Atlanta"
] | 0 | closed choice | grade4 | social science | geography | Cities | Cities of the Southeast | The city is New Orleans, Louisiana. Houston, Atlanta, and Dallas are marked with gray circles on the map below. | |||
Not supported with pagination yet | How long does it take to slide down a slide? | [
"4 hours",
"4 seconds"
] | 1 | 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 slide down a slide is 4 seconds.
4 hours is too slow. |
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 1.",
"The magnitude of the magnetic force is greater 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,... | Both magnet sizes and distance affect the magnitude of the magnetic force. The sizes of the magnets in Pair 1 are the same as in Pair 2. The distance between the magnets is also the same.
So, the magnitude of the magnetic force is the same in both pairs. | |
Not supported with pagination yet | Which figure of speech is used in this text?
Vicky asked her mother if she could adopt a cat, and her mother replied, "It's a definite maybe," so Vicky didn't want to get her hopes up. | [
"hyperbole",
"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.
Definite maybe is a contradiction, because definite describes something that is sure, and maybe refers to something that is unsure. | |
What evidence of a wildfire does this picture show? | [
"There is fire and smoke.",
"The grass is mostly green."
] | 0 | This picture was taken during a wildfire. A wildfire happens when a natural area catches fire and burns. | closed choice | grade2 | natural science | earth-science | Earth events | Find evidence of changes to Earth's surface | Evidence is information that tells you something happened.
How do you look for evidence of a change to Earth's surface?
There are many ways to find evidence of a change to Earth's surface. One way is to look at a picture that was taken after the change.
Here are some examples of what the evidence for different changes ... | ||
Not supported with pagination yet | Does this passage describe the weather or the climate?
It has not rained in over a week at Ernest's house. | [
"weather",
"climate"
] | 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 | grade3 | 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.
It has not rained in over a week at Ernest's house.
This passage tells you about the precipitation last week at Ernest's house. It describes the atmosphere at a certain place and time. So, this passage describes the weather. |
Not supported with pagination yet | What information supports the conclusion that Mabel acquired this trait? | [
"Mabel's sister has a bruise from falling on her elbow.",
"Mabel's scar was caused by an accident. She cut her arm when she fell off her bicycle.",
"Mabel's scar is on her right elbow. Her father also has a scar on his right elbow."
] | 1 | Read the description of a trait.
Mabel has a scar on her right elbow. | closed choice | grade8 | 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 | Which greeting is correct for a letter? | [
"Dear Dr. novak,",
"Dear Dr. Novak,"
] | 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 greeting is correct:
Its first word is capitalized, and it ends with a comma. Dr. Novak is capitalized because it is a proper noun. | |
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 smaller in Pair 2.",
"The magnitude of the magnetic force is the same in both pairs."
] | 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,... | Both magnet sizes and distance affect the magnitude of the magnetic force. The sizes of the magnets in Pair 1 are the same as in Pair 2. The distance between the magnets is also the same.
So, the magnitude of the magnetic force is the same in both pairs. | |
Not supported with pagination yet | Which sentence states a fact? | [
"Volcanoes are openings in the Earth's rocky crust.",
"Science classes spend too much time covering volcanoes."
] | 0 | closed choice | grade4 | language science | writing-strategies | Developing and supporting arguments | Distinguish facts from opinions | A fact is something that can be proved to be true.
The month of July has more days than the month of June.
This is a fact. It can be proved by looking at a calendar and counting the number of days in each month.
An opinion is something that a person believes, thinks, or feels. An opinion cannot be proved true.
July is ... | The first sentence states a fact.
Volcanoes are openings in the Earth's rocky crust.
It can be proved by reading a book about volcanoes.
The second sentence states an opinion.
Science classes spend too much time covering volcanoes.
Too much time shows what a person believes, thinks, or feels. Another person might have ... | |
Not supported with pagination yet | Select the vertebrate. | [
"cat",
"bess beetle"
] | 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 bess beetle is an insect. Like other insects, a bess beetle is an invertebrate. It does not have a backbone. It has a hard outer cover.
A cat is a mammal. Like other mammals, a cat is a vertebrate. It has a backbone. |
Is sand a solid, a liquid, or a gas? | [
"a liquid",
"a solid",
"a gas"
] | 1 | 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... | Sand is a solid. A solid has a size and shape of its own. Sand is made of many small pieces of rocks and minerals, called grains.
Imagine putting many grains of sand into a bucket. The sand takes the shape of the bucket, as a liquid would. But be careful! Sand is not a liquid. Each grain of sand still has a size and sh... | ||
Not supported with pagination yet | Which figure of speech is used in this text?
Elderly American ladies leaning on their canes listed toward me like towers of Pisa.
—Vladimir Nabokov, Lolita | [
"pun",
"simile"
] | 1 | closed choice | grade10 | language science | figurative-language | Literary devices | Classify figures of speech: review | 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 includes a simile, using like or as to compare two things that are not actually alike.
Like towers of Pisa compares elderly ladies to the Leaning Tower of Pisa. | |
Not supported with pagination yet | Which closing is correct for a letter? | [
"thank you,\nSue",
"Thank you,\nSue"
] | 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 | Which logical fallacy is used in the text?
Tara never lies. She told me herself, so it must be true. | [
"straw man: a misrepresentation of an opponent's position that makes it easier to argue against",
"circular reasoning: an argument that supports a claim with the claim itself"
] | 1 | closed choice | grade7 | 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 Tara is telling the truth because she says she never lies. However, the "evidence" is just a restatement of the claim itself. This illustrates a type of logical fallacy known as circular reasoning. | |
Not supported with pagination yet | What is the source of the allusion in the sentence below?
From the look on her face, Belle is carrying an albatross around her neck. | [
"Egyptian history",
"a poem"
] | 1 | closed choice | grade10 | language science | figurative-language | Literary devices | Recall the source of an allusion | An allusion is a brief mention of something or someone well known, often from mythology, history, or literature. An allusion lets you reference ideas from an entire story in just a few words.
"I'd better get home before I turn into a pumpkin!" Lila remarked.
Here, Lila alludes to the fairy tale "Cinderella," in which C... | The source of the allusion an albatross around her neck is a poem.
In Samuel Taylor Coleridge's poem "The Rime of the Ancient Mariner," a sailor shoots and kills an albatross, an action that curses the ship and crew. As his crew members die, the Ancient Mariner feels his guilt hanging like the albatross around his neck... | |
Not supported with pagination yet | Which is a run-on sentence? | [
"Mr. Molina will teach a math lesson the children will take notes.",
"An empty silver bucket."
] | 0 | closed choice | grade3 | language science | writing-strategies | Sentences, fragments, and run-ons | Is it a complete sentence, a fragment, or a run-on? | A sentence is a group of words that forms a complete thought. It has both a subject and a verb.
My friends walk along the path.
A sentence fragment is a group of words that does not express a complete thought. It is usually missing a subject or a verb.
Knows the answer.
This is a sentence fragment. It is missing a subj... | Mr. Molina will teach a math lesson the children will take notes is a run-on sentence. It has two sentences that are joined without end punctuation: Mr. Molina will teach a math lesson and The children will take notes. | |
Which of these cities is marked on the map? | [
"Milwaukee",
"Chicago",
"St. Louis",
"Indianapolis"
] | 0 | closed choice | grade5 | social science | geography | Cities | Cities of the Midwest | The city is Milwaukee, Wisconsin. Chicago, Indianapolis, and St. Louis are marked with gray circles on the map below. | |||
Not supported with pagination yet | What is the source of the allusion in the sentence below?
"Darren's personality is very Jekyll and Hyde," Emilia told her brother. | [
"a song",
"literature"
] | 1 | closed choice | grade7 | language science | figurative-language | Literary devices | Recall the source of an allusion | An allusion is a brief mention of something or someone well known, often from mythology, history, or literature. An allusion lets you reference ideas from an entire story in just a few words.
"I'd better get home before I turn into a pumpkin!" Lila remarked.
Here, Lila alludes to the fairy tale "Cinderella," in which C... | The source of the allusion Jekyll and Hyde is literature.
Robert Louis Stevenson's popular Victorian novella Dr. Jekyll and Mr. Hyde tells the story of a man with two distinct personalities. Known to the world as a kind and highly respected doctor, at night he transforms into a monstrous person.
The allusion Jekyll and... | |
Compare the average kinetic energies of the particles in each sample. Which sample has the higher temperature? | [
"sample B",
"sample A",
"neither; the samples have the same temperature"
] | 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 sample A has more mass than each particle in sample B. The particles in sample A also 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 ... | |
Think about the magnetic force between the magnets in each pair. Which of the following statements is true? | [
"The strength of the magnetic force is the same in both pairs.",
"The magnetic force is stronger in Pair 1.",
"The magnetic force is stronger in Pair 2."
] | 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. | 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. | |
What is the direction of this push? | [
"away from the bottom magnet",
"toward the bottom magnet"
] | 0 | Each of these ring magnets repels the other with a magnetic force. This force is a push.
The force from the bottom magnet pushes the top magnet. | closed choice | grade4 | natural science | physics | Force and motion | Identify directions of forces | A force is a push or a pull that one object applies to another. Every force has a direction.
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 bottom magnet pushes the top magnet. The direction of the push is away from the bottom magnet. | |
Which of the following could Kirk's test show? | [
"how many solar panels could fit on each side of the roof",
"which side of the roof got more sun over one day",
"the amount of sunlight the roof would get throughout the year"
] | 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 of the following organisms is the primary consumer in this food web? | [
"barren-ground caribou",
"parasitic jaeger",
"rough-legged hawk"
] | 0 | Below is a food web from a tundra ecosystem in Nunavut, a territory in Northern Canada.
A food web models how the matter eaten by organisms moves through an ecosystem. The arrows in a food web represent how matter moves between organisms in an ecosystem. | closed choice | grade6 | natural science | biology | Ecological interactions | Interpret food webs I | A food web is a model.
A food web shows where organisms in an ecosystem get their food. Models can make things in nature easier to understand because models can represent complex things in a simpler way. If a food web showed every organism in an ecosystem, the food web would be hard to understand. So, each food web sho... | Primary consumers eat producers. So, in a food web, primary consumers have arrows pointing to them from producers.
The grizzly bear has an arrow pointing to it from the bilberry. The bilberry is a producer, so the grizzly bear is a primary consumer.
The rough-legged hawk has an arrow pointing to it from the parasitic j... | |
Not supported with pagination yet | Which text uses the word factoid in its traditional sense? | [
"As a geneticist, Maria enjoys watching science documentaries and sharing various factoids she's learned with her colleagues.",
"As a geneticist, Maria dislikes many popular sci-fi movies because they often present audiences with factoids that misrepresent her field."
] | 1 | closed choice | grade12 | 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 first text uses factoid in its traditional sense: something made up presented as a true fact.
As a geneticist, Maria dislikes many popular sci-fi movies because they often present audiences with factoids that misrepresent her field.
The second text uses factoid in its nontraditional sense: a trivial but true fact.
... | |
Not supported with pagination yet | Based on this information, what is Stacy's phenotype for the sickle-cell disease trait? | [
"not having sickle-cell disease",
"having sickle-cell disease"
] | 1 | This passage describes the sickle-cell disease trait in humans:
In a group of humans, some individuals have sickle-cell disease and others do not. In this group, the gene for the sickle-cell disease trait has two alleles. The allele for not having sickle-cell disease (A) is dominant over the allele for having sickle-c... | closed choice | grade8 | 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 ... | Stacy's genotype for the sickle-cell disease gene is aa. Stacy's genotype of aa has only a alleles. The a allele is for having sickle-cell disease. So, Stacy's phenotype for the sickle-cell disease trait must be having sickle-cell disease.
To check this answer, consider whether Stacy's alleles are dominant or recessive... |
Which country is highlighted? | [
"Trinidad and Tobago",
"Jamaica",
"Haiti",
"Cuba"
] | 2 | closed choice | grade8 | 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... | |||
Not supported with pagination yet | What kind of sentence is this?
Please stand up when you hear your name. | [
"imperative",
"interrogative"
] | 0 | closed choice | grade4 | 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. It tells about something. A declarative sentence always ends with a period.
I have an older brother and a younger sister.
An interrogative sentence is a question. It asks something. An interrogative sentence always ends with a question mark.
How ... | The sentence makes a request, so it is an imperative sentence. Here, it ends with a period. | |
Not supported with pagination yet | Which empty mug has more thermal energy? | [
"the colder empty mug",
"the hotter empty mug"
] | 1 | Two empty mugs 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 empty mugs are made of the same material and have the same mass. So, the hotter empty mug has more thermal energy. |
Not supported with pagination yet | What is the volume of a kiddie pool? | [
"285 fluid ounces",
"285 gallons",
"285 cups"
] | 1 | Select the best estimate. | closed choice | grade5 | natural science | units-and-measurement | Units and measurement | Choose customary 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 customary units, volume may be written in units of fluid ounces, cups,... | The best estimate for the volume of a kiddie pool is 285 gallons.
285 fluid ounces and 285 cups are both too little. |
Select the fish below. | [
"tiger salamander",
"green iguana",
"leafy seadragon",
"green tree frog"
] | 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 piranha 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. | A leafy seadragon is a fish. It lives underwater. It has fins, not limbs.
A seadragon's body looks like a clump of seaweed. This helps the seadragon hide from its predators.
A green iguana is a reptile. It has scaly, waterproof skin.
Iguanas are a type of lizard. Iguanas eat plants and fruit.
A tiger salamander is an a... | |
Not supported with pagination yet | Is the following statement true or false?
The cell membrane is the outermost layer in a plant cell. | [
"false",
"true"
] | 0 | true-or false | grade4 | natural science | biology | Cells | Cell part functions: true or false | The cell membrane is the outermost layer in a plant cell.
This statement is false. A plant cell has a cell wall. The cell wall is outside the cell membrane. | ||
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."
] | 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 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 ... | |
What is the capital of Arizona? | [
"Carson City",
"Nashville",
"Tucson",
"Phoenix"
] | 3 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the West | Phoenix is the capital of Arizona. | |||
Not supported with pagination yet | Which is a compound sentence? | [
"Earthworms can be food for birds, and fishermen can use them as bait.",
"Every winter my father grows a thick beard."
] | 0 | 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 second sentence is the compound sentence. It is made up of two simple sentences joined by a comma and the conjunction and.
Earthworms can be food for birds, and fishermen can use them as bait. | |
Not supported with pagination yet | Based on this information, what is Fang's phenotype for the coat pattern trait? | [
"a spotted coat",
"a black coat"
] | 0 | In a group of jaguars, some individuals have a black coat and others have a spotted coat. In this group, the gene for the coat pattern trait has two alleles. The allele for a black coat (A) is dominant over the allele for a spotted coat (a).
Fang is a jaguar from this group. Fang has the homozygous genotype aa for the ... | closed choice | grade6 | 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 ... | Fang's genotype for the coat pattern gene is aa. Fang's genotype of aa has only a alleles. The a allele is for a spotted coat. So, Fang's phenotype for the coat pattern trait must be a spotted coat.
To check this answer, consider whether Fang's alleles are dominant or recessive. The allele for a black coat (A) is domin... |
Not supported with pagination yet | What do these two changes have in common?
mixing sand and water
picking up a paper clip with a magnet | [
"Both are caused by cooling.",
"Both are caused by heating.",
"Both are chemical changes.",
"Both are only physical changes."
] | 3 | closed choice | grade7 | 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.
Mixing sand and water is a physical change. Adding water makes the sand wet. But both the sand and water are still made of the same type of matter as before.
Picking up a paper clip with a magnet is a physical change. The paper clip sticks to the magnet, but it is still made of the same... | |
Not supported with pagination yet | How long is a hummingbird's beak? | [
"3 centimeters",
"3 kilometers",
"3 millimeters",
"3 meters"
] | 0 | Select the best estimate. | closed choice | grade7 | 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 hummingbird's beak is 3 centimeters.
3 millimeters is too short. 3 meters and 3 kilometers are too long. |
Which of the following could Jenny's test show? | [
"whether she added enough nutrients to help the bacteria produce 20% more insulin",
"whether different types of bacteria would need different nutrients to produce insulin",
"whether producing more insulin would help the bacteria grow faster"
] | 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 | 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 | Which person is part of state government? | [
"a governor",
"a president",
"a mayor"
] | 0 | closed choice | grade2 | social science | civics | Government | State government | A governor is the leader of a state. A mayor is the leader of a city. A president is the leader of a nation. | ||
Not supported with pagination yet | Which tense does the sentence use?
The birds soared high above the street. | [
"future tense",
"present tense",
"past tense"
] | 2 | closed choice | grade4 | 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 past tense. You can tell because it uses a past-tense verb, soared. The verb ends in -ed and tells you about something that has already happened. | |
Not supported with pagination yet | What information supports the conclusion that Judith acquired this trait? | [
"Judith learned how to make chili from a recipe book.",
"When Judith was young, her grandmother taught her how to cut chili peppers.",
"Judith's friends like to make chili with her."
] | 0 | Read the description of a trait.
Judith knows how to make chili. | closed choice | grade8 | 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.... | |
Which air temperature was measured within the outlined area shown? | [
"4°C",
"32°C",
"12°C"
] | 1 | The map below shows air temperatures in the lower atmosphere on September 12, 2013. The outlined area shows an air mass that influenced weather in Australia on that day.
Look at the map. Then, answer the question below.
Data source: United States National Oceanic and Atmospheric Administration/Earth System Research Lab... | closed choice | grade6 | natural science | earth-science | Weather and climate | Identify and compare air masses | To study air masses, scientists can use maps that show conditions within Earth's atmosphere. For example, the map below uses color to show air temperatures.
The map's legend tells you the temperature that each color represents. Colors on the left in the legend represent lower temperatures than colors on the right. For ... | Look at the colors shown within the outlined area. Then, use the legend to determine which air temperatures those colors represent.
The legend tells you that this air mass contained air with temperatures between 25°C and 35°C.
32°C is within this range.
4°C and 12°C are outside of this range. | |
Not supported with pagination yet | Is the following trait inherited or acquired?
Jen plays hockey. | [
"acquired",
"inherited"
] | 0 | Hint: Playing hockey takes practice. | closed choice | grade3 | natural science | biology | 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 play hockey. Instead, some people learn how to play hockey. Playing the sport takes practice. So, playing hockey is an acquired trait. |
Not supported with pagination yet | Which logical fallacy is used in the text?
I get my drinking water from a well in my backyard. I don't trust tap water, because it has been treated with chemicals. | [
"appeal to nature: the assumption that natural things are always good",
"slippery slope fallacy: the false assumption that a small first step will lead to extreme consequences",
"straw man: a misrepresentation of an opponent's position that makes it easier to argue against"
] | 0 | closed choice | grade11 | 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 tap water isn't safe because it has been chemically treated. However, something isn't necessarily more dangerous just because it has been chemically treated. This illustrates a type of logical fallacy known as an appeal to nature. | |
Not supported with pagination yet | Which sentence states a fact? | [
"The Maori people of New Zealand have the most fascinating culture.",
"The Maori people are the native people of New Zealand."
] | 1 | closed choice | grade8 | social science | civics | Social studies skills | Identify facts and opinions | A fact is something that can be proved true by research or observation.
George Washington became president of the United States in 1789.
This statement is a fact. It can be proved by researching what year George Washington was inaugurated president.
An opinion is something that a person believes, thinks, or feels. An o... | The first sentence states a fact.
The Maori people are the native people of New Zealand.
It can be proved by reading about New Zealand.
The second sentence states an opinion.
The Maori people of New Zealand have the most fascinating culture.
Most fascinating shows what a person believes, thinks, or feels. Another perso... | |
What is the capital of Colorado? | [
"Olympia",
"Montpelier",
"Milwaukee",
"Denver"
] | 3 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the West | Denver is the capital of Colorado. | |||
Not supported with pagination yet | Complete the sentence.
Mixing lettuce and salad dressing is a (). | [
"chemical change",
"physical change"
] | 1 | 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... | Mixing lettuce and salad dressing is a physical change. Together, the salad and dressing make a mixture. But making this mixture does not form a different type of matter. | |
Not supported with pagination yet | How long is a basketball court? | [
"24 kilometers",
"24 meters",
"24 millimeters",
"24 centimeters"
] | 1 | Select the best estimate. | closed choice | grade7 | 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 basketball court is 24 meters.
24 millimeters and 24 centimeters are too short. 24 kilometers is too long. |
Not supported with pagination yet | Which sentence states a fact? | [
"Hurricane Rita was the worst storm in history.",
"Hurricanes are tropical storms with strong winds and heavy rains."
] | 1 | closed choice | grade4 | language science | writing-strategies | Developing and supporting arguments | Distinguish facts from opinions | A fact is something that can be proved to be true.
The month of July has more days than the month of June.
This is a fact. It can be proved by looking at a calendar and counting the number of days in each month.
An opinion is something that a person believes, thinks, or feels. An opinion cannot be proved true.
July is ... | The second sentence states a fact.
Hurricanes are tropical storms with strong winds and heavy rains.
It can be proved by looking up hurricane in the dictionary.
The first sentence states an opinion.
Hurricane Rita was the worst storm in history.
Worst shows what a person believes, thinks, or feels. Another person might... | |
Is apple juice a solid, a liquid, or a gas? | [
"a gas",
"a liquid",
"a solid"
] | 1 | 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... | Apple juice is a liquid. A liquid takes the shape of any container it is in.
If you pour apple juice into a different container, the apple juice will take the shape of that container. But the apple juice will still take up the same amount of space. | ||
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 2.",
"The magnitude of the magnetic force is smaller 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 and shapes. | 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,... | Magnet sizes affect the magnitude of the magnetic force. Imagine magnets that are the same shape and made of the same material. The smaller the magnets, the smaller the magnitude of the magnetic force between them.
Magnet A is the same size in both pairs. But Magnet B is smaller in Pair 1 than in Pair 2. So, the magnit... | |
What is the probability that a rabbit produced by this cross will have brown fur? | [
"0/4",
"2/4",
"1/4",
"3/4",
"4/4"
] | 0 | 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 for black fur (F) is dominant over the allele for brown fur (f).
This Punnett square shows a cross between two rabbits. | closed choice | grade8 | natural science | biology | Genes to traits | Use Punnett squares to calculate probabilities of offspring types | Offspring phenotypes: dominant or recessive?
How do you determine an organism's phenotype for a trait? Look at the combination of alleles in the organism's genotype for the gene that affects that trait. Some alleles have types called dominant and recessive. These two types can cause different versions of the trait to a... | ||
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... | The particles in both samples have the same average speed, but each particle in sample A has more mass than each particle 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, sample A mus... | |
Not supported with pagination yet | Compare the motion of two buses. Which bus was moving at a higher speed? | [
"a bus that moved 265kilometers in 5hours",
"a bus that moved 210kilometers in 5hours"
] | 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 kilometer.
Time tells you how long the object has spent moving. One unit used to measure time is the hour.
Think about two objects... | Look at the distance each bus moved and the time it took to move that distance.
One bus moved 265 kilometers in 5 hours.
The other bus moved 210 kilometers in 5 hours.
Notice that each bus spent the same amount of time moving. The bus that moved 265 kilometers moved a farther distance in that time. So, that bus must ha... | |
Not supported with pagination yet | Suppose Evan decides to join the Photography Club. Which result would be a cost? | [
"Evan will have more fun in the Photography Club than he would have had in the Theater Club.",
"Evan will spend more time in the Photography Club than he would have spent in the Theater Club."
] | 1 | Evan is deciding whether to join the Photography Club or the Theater Club at school. He wants the club he joins to be fun. But he doesn't want it to take up too much time. | 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 Evan wants or needs:
Evan will spend more time in the Photography Club than he would have spent in the Theater Club. |
Not supported with pagination yet | Last year, there were seven men's clothing stores on Main Street in Belmont. This year, there are only three. What probably happened to the overall supply of men's shirts in Belmont? | [
"The supply probably went up.",
"The supply probably went down."
] | 1 | closed choice | grade6 | 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... | When four men's clothing stores closed on Main Street, the number of suppliers went down. There were fewer stores selling men's shirts. So, the supply of men's shirts probably went down. | |
Which continent is highlighted? | [
"Europe",
"Africa",
"Antarctica",
"South America"
] | 1 | 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 Africa. | ||
Does this passage describe the weather or the climate? | [
"climate",
"weather"
] | 1 | Figure: Las Vegas.
Las Vegas is in the desert. The sky was clear before the fireworks show on December 31, 1999.
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 | 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.
Las Vegas is in the desert. The sky was clear before the fireworks show on December 31, 1999.
The underlined part of the passage tells you about the cloud cover in Las Vegas on December 31, 1999. This passage describes the atmosphere at a certain place and time. So, this passage describes th... | |
Which property do these three objects have in common? | [
"shiny",
"sticky",
"fuzzy"
] | 0 | Select the best answer. | closed choice | grade3 | 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. | Look at each object.
For each object, decide if it has that property.
A shiny object reflects a lot of light. You can usually see your reflection in a shiny object. All three objects are shiny.
A sticky object can attach or stick to other things. None of the objects are sticky.
A fuzzy object is covered in soft hair. N... | |
Not supported with pagination yet | According to Newton's third law, what other force must be happening? | [
"The door is pushing on Shivani's hand.",
"The door is pulling on Shivani'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:
Shivani's hand is pushing on a door. | closed choice | grade8 | 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... | Shivani's hand is pushing on the door. So, Newton's third law tells you that the door is pushing on Shivani's hand. |
What is the probability that a leopard produced by this cross will be homozygous dominant for the coat pattern gene? | [
"2/4",
"4/4",
"1/4",
"0/4",
"3/4"
] | 3 | In a group of leopards, some individuals have a spotted coat and others have a black coat. In this group, the gene for the coat pattern trait has two alleles. The allele for a black coat (a) is recessive to the allele for a spotted coat (A).
This Punnett square shows a cross between two leopards. | closed choice | grade8 | natural science | biology | Genes to traits | Use Punnett squares to calculate probabilities of offspring types | Offspring genotypes: homozygous or heterozygous?
How do you determine whether an organism is homozygous or heterozygous for a gene? Look at the alleles in the organism's genotype for that gene.
An organism with two identical alleles for a gene is homozygous for that gene.
If both alleles are dominant, the organism is h... | ||
What is the capital of Missouri? | [
"Jefferson City",
"Saint Louis",
"Lincoln",
"Salt Lake City"
] | 0 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the Midwest | Jefferson City is the capital of Missouri. | |||
Not supported with pagination yet | Which greeting is correct for a letter? | [
"Dear Mr. pratt,",
"Dear Mr. Pratt,"
] | 1 | 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 second greeting is correct:
Its first word is capitalized, and it ends with a comma. Mr. Pratt is capitalized because it is a proper noun. | |
What is the capital of Georgia? | [
"Tallahassee",
"Atlanta",
"Salt Lake City",
"Athens"
] | 1 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the Southeast | Atlanta is the capital of Georgia. | |||
Not supported with pagination yet | Based on this information, what is Henrietta's phenotype for the body feather color trait? | [
"green body feathers",
"Bb"
] | 0 | 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.
Henrietta, a budgerigar parakeet from this grou... | 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 phenotype for a trait is its observable version of that trait. Henrietta's observable version of the body feather color trait is green body feathers. So, Henrietta's phenotype for the body feather color trait is green body feathers. |
Which of these states is farthest south? | [
"Iowa",
"New Jersey",
"Kansas",
"North Dakota"
] | 2 | closed choice | grade4 | 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 south arrow is pointing. Kansas is farthest south. | ||
Identify the question that Hazel's experiment can best answer. | [
"Does fabric turn darker when soaked in a mixture of black dye and water for 15 minutes compared to 30 minutes?",
"Does linen fabric turn darker than cotton fabric when soaked in a mixture of black dye and water?"
] | 1 | The passage below describes an experiment. Read the passage and then follow the instructions below.
Hazel prepared ten buckets, each with one gallon of boiling water and three tablespoons of black fabric dye. Hazel 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... | ||
What is the name of the colony shown? | [
"West Virginia",
"Iowa",
"Rhode Island",
"New York"
] | 2 | closed choice | grade4 | social science | us-history | English colonies in North America | Identify the Thirteen Colonies | The colony is Rhode Island. | |||
Not supported with pagination yet | Which logical fallacy is used in the text?
The French family I stayed with over the summer had read all the British romantic poets. It's amazing how cosmopolitan and well educated French people are. | [
"slippery slope fallacy: the false assumption that a small first step will lead to extreme consequences",
"hasty generalization: a broad claim based on too few observations",
"circular reasoning: an argument that supports a claim with the claim itself"
] | 1 | closed choice | grade10 | 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 one well-read French family is evidence that all French people are well educated. However, the reading habits of one French family do not necessarily reflect the reading habits of all French people. This illustrates a type of logical fallacy known as a hasty generalization. | |
Which letter marks the territory controlled by the ancient Maya civilization? | [
"B",
"C",
"A",
"D"
] | 1 | The following map shows the locations of several ancient civilizations in North and South America. Look at the map. Then answer the question below. | closed choice | grade7 | social science | world-history | Early Americas | Foundations of Maya civilization | The ancient Maya civilization developed in Mesoamerica. Mesoamerica is a region that stretches from central Mexico through northern Central America.
This map shows the territory controlled by the ancient Maya civilization. Today, this area covers parts of many countries:
This photograph shows the ruins of a Maya city c... | ||
Which country is highlighted? | [
"Cuba",
"Jamaica",
"Haiti",
"The Bahamas"
] | 0 | closed choice | grade6 | social science | geography | The Americas: geography | Identify and select countries of the Caribbean | This country is Cuba.
Does Cuba have any territorial disputes?
Cuba claims to own Guantanamo Bay Naval Base, which is a disputed territory. In other words, multiple countries or groups claim that the area rightfully belongs to them.
The United States controls the area and uses it as a military base and prison. A treaty... |
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.