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Not supported with pagination yet | Is the following statement true or false?
An animal cell does not have a nucleus. | [
"false",
"true"
] | 0 | true-or false | grade4 | natural science | biology | Cells | Cell part functions: true or false | An animal cell does not have a nucleus.
This statement is false. Not every cell has a nucleus, but most plant and animal cells have one. | ||
Not supported with pagination yet | Select the amphibian. | [
"red-eyed tree frog",
"eagle ray",
"red kangaroo",
"Mojave rattlesnake"
] | 0 | closed choice | grade5 | natural science | biology | Classification | Identify mammals, birds, fish, reptiles, and amphibians | Amphibians have moist skin and begin their lives in water. | A red-eyed tree frog is an amphibian. It has moist skin and begins its life in water.
A red-eyed tree frog has sticky pads on its toes. The sticky pads help the red-eyed tree frog hold on to leaves.
An eagle ray is a fish. It lives underwater. It has fins, not limbs.
Rays have a different shape than many other fish. Ra... | |
Not supported with pagination yet | Select the living thing. | [
"flower pot",
"crocodile"
] | 1 | closed choice | grade3 | natural science | biology | Classification | Identify living and nonliving things | All living things need food and water. Water helps living things break down food and remove waste. Food gives living things energy. Living things use this energy to grow and change. All living things grow and change during their lives.
All living things sense changes in the world around them. Living things might sense ... | A flower pot is not a living thing.
Flower pots do not have all of the traits of living things. They do not grow or respond to the world around them. They do not need food or water.
A crocodile is a living thing.
Crocodiles grow and respond to the world around them. They need food and water. | |
Which country is highlighted? | [
"Grenada",
"Saint Vincent and the Grenadines",
"Trinidad and Tobago",
"Haiti"
] | 0 | closed choice | grade6 | social science | geography | The Americas: geography | Identify and select countries of the Caribbean | This country is Grenada. | |||
Not supported with pagination yet | What kind of sentence is this?
Sasha is completely soaked! | [
"declarative",
"exclamatory"
] | 1 | 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 tells about something, but it shows surprise and ends with an exclamation point. It is an exclamatory sentence. | |
Not supported with pagination yet | Suppose Jen decides to take a trip to Oregon. Which result would be a cost? | [
"Jen will enjoy her trip to Oregon more than she would have enjoyed a trip to Georgia.",
"Jen will spend more money. Plane tickets for Jen to get to Oregon are more expensive than tickets to Georgia."
] | 1 | Jen is deciding whether to take a trip to Oregon or Georgia. She wants to enjoy her trip. But she is also trying to save money. | 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 Jen wants or needs:
Jen will spend more money. Plane tickets for Jen to get to Oregon are more expensive than tickets to Georgia. |
Not supported with pagination yet | Based on this information, what is this fruit fly's genotype for the body color gene? | [
"a gray body",
"Bb"
] | 1 | In a group of fruit flies, some individuals have a gray body and others have a black body. In this group, the gene for the body color trait has two alleles. The allele B is for a gray body, and the allele b is for a black body.
A certain fruit fly from this group has a gray body. This fly has one allele for a gray body... | 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 fruit fly has one allele for a gray body (B) and one allele for a black body (b). So, the fly's genotype for the body color gene is Bb. |
Not supported with pagination yet | Which is a simple sentence? | [
"The trek across New Zealand's South Island is exhausting, but the gorgeous views make it worth the effort.",
"Before the race, the athletes enjoyed a healthy breakfast of oatmeal, fruit, and tea."
] | 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 simple sentence. It is a single independent clause.
Before the race, the athletes enjoyed a healthy breakfast of oatmeal, fruit, and tea. | |
Not supported with pagination yet | Select the one substance that is not a rock. | [
"An eggshell is made by a living thing. It is formed in nature.",
"Soapstone is not a pure substance. It is a solid.",
"Trachyte is not a pure substance. It is not made by living things."
] | 0 | closed choice | grade4 | natural science | earth-science | Rocks and minerals | Identify rocks using properties | Rocks are made of minerals. Here are some properties of rocks:
They are solid.
They are formed in nature.
They are not made by living things.
They are not pure substances. | Compare the properties of each substance to the properties of rocks. Select the substance whose properties do not match those of rocks.
An eggshell is made by a living thing. But rocks are not made by living things.
So, an eggshell is not a rock.
Trachyte is a rock.
Soapstone is a rock. | |
Not supported with pagination yet | How long is a paintbrush? | [
"27 centimeters",
"27 meters"
] | 0 | Select the better estimate. | closed choice | grade2 | natural science | units-and-measurement | Units and measurement | Choose metric 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 16 long. You might be thinking, 16 what? Is the pencil 16 centimeters long? 16 meters? 16 kilometers?
The number 16 on its own does not give you much informa... | The better estimate for the length of a paintbrush is 27 centimeters.
27 meters is too long. |
What is the capital of North Dakota? | [
"Madison",
"Indianapolis",
"Des Moines",
"Bismarck"
] | 3 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the Midwest | Bismarck is the capital of North Dakota. | |||
Not supported with pagination yet | Which logical fallacy is used in the text?
Senator Smith announced today that she plans to cut funding to early childhood education programs. The last thing we need is a government official who hates children! | [
"straw man: a misrepresentation of an opponent's position that makes it easier to argue against",
"guilt by association: a negative association intended to discredit someone or something"
] | 0 | closed choice | grade8 | 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 Senator Smith hates children, because she wants to cut education funding. However, the fact that Senator Smith wants to cut education funding doesn't necessarily suggest that she hates children. This illustrates a type of logical fallacy known as a straw man. | |
Not supported with pagination yet | Which phrase has a more positive connotation? | [
"a thrifty person",
"a stingy person"
] | 0 | closed choice | grade6 | language science | vocabulary | Shades of meaning | Positive and negative connotation | Connotation is the feeling or idea that goes along with a word or phrase. Some words are close in meaning but have different connotations.
For example, think about the words eager and impatient. They both mean wanting something to happen, but they have different connotations.
Eager has a positive connotation. It is a n... | A thrifty person has a more positive connotation. Thrifty and stingy both denote not wanting to spend money. However, thrifty suggests a person spends money carefully, while stingy suggests a person is ungenerous or cheap. | |
Not supported with pagination yet | Which correctly shows the title of a newspaper? | [
"\"The Baltimore Sun\"",
"***The Baltimore Sun***"
] | 1 | closed choice | grade6 | 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 newspaper should be in italics.
The correct title is **The Baltimore Sun**. | |
What is the capital of North Dakota? | [
"Bismarck",
"Saint Paul",
"Fargo",
"Hilo"
] | 0 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the Midwest | Bismarck is the capital of North Dakota. | |||
Not supported with pagination yet | Complete the statement.
Silane is (). | [
"an elementary substance",
"a compound"
] | 1 | Silane is used to produce some types of solar cells, which make electricity from sunlight. The chemical formula for silane is SiH4. | closed choice | grade5 | natural science | chemistry | Atoms and molecules | Classify elementary substances and compounds using chemical formulas | Every substance around you is made of one or more chemical elements, or types of atoms. Substances that are made of only one chemical element are elementary substances. Substances that are made of two or more chemical elements bonded together are compounds.
Every chemical element is represented by its own symbol. For s... | You can tell whether silane is an elementary substance or a compound by counting the number of symbols in its chemical formula. A symbol contains either one capital letter or a capital letter followed by one or two lowercase letters.
The chemical formula for silane is SiH4. This formula contains two symbols: Si for sil... |
Not supported with pagination yet | Compare the motion of three geese. Which goose was moving at the highest speed? | [
"a goose that moved 675miles north in 10hours",
"a goose that moved 575miles west in 10hours",
"a goose that moved 765miles north in 10hours"
] | 2 | closed choice | grade3 | natural science | physics | Force and motion | Compare the speeds of moving objects | An object's speed tells you how fast the object is moving. Speed depends on both distance and time.
Distance tells you how far the object has moved. One unit used to measure distance is the mile.
Time tells you how long the object has spent moving. One unit used to measure time is the hour.
Think about objects moving f... | Look at the distance each goose moved and the time it took to move that distance. The direction each goose moved does not affect its speed.
Notice that each goose moved for 10 hours. The goose that moved 765 miles moved the farthest distance in that time. So, that goose must have moved at the highest speed. | |
Not supported with pagination yet | What kind of sentence is this?
The boys picked apples in the orchard. | [
"declarative",
"exclamatory"
] | 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 tells about something, and it ends with a period. It is a declarative sentence. | |
What is the name of the colony shown? | [
"Massachusetts",
"Georgia",
"Rhode Island",
"Maryland"
] | 0 | closed choice | grade4 | social science | us-history | English colonies in North America | Identify the Thirteen Colonies | The colony is Massachusetts.
The Massachusetts Colony included land that would later become the state of Maine. Maine was never its own colony. | |||
Complete the statement.
Boron trifluoride is (). | [
"an elementary substance",
"a compound"
] | 1 | The model below represents a molecule of boron trifluoride. Boron trifluoride is used to make many types of chemicals, such as plastics. | closed choice | grade5 | natural science | chemistry | Atoms and molecules | Classify elementary substances and compounds using models | All substances are made of one or more chemical elements, or types of atoms. Substances that are made of only one chemical element are elementary substances. Substances that are made of two or more chemical elements bonded together are compounds.
Every chemical element is represented by its own symbol. For some element... | Count the number of chemical elements represented in the model. Then, decide if boron trifluoride is an elementary substance or a compound.
In this model, each ball is labeled with B for boron or F for fluorine. So, the model shows you that boron trifluoride is made of two chemical elements bonded together.
Substances ... | |
Not supported with pagination yet | Suppose Hayley decides to see the lions. Which result would be a cost? | [
"Hayley will enjoy seeing the lions more than she would have enjoyed seeing the gorillas.",
"Hayley will spend more time walking to the lions. They are on the other side of the zoo, but the gorillas are close by."
] | 1 | Hayley is deciding whether to see the lions or the gorillas at the zoo. She wants to see lots of animals, but the zoo is closing soon. | 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 Hayley wants or needs:
Hayley will spend more time walking to the lions. They are on the other side of the zoo, but the gorillas are close by. |
Not supported with pagination yet | What do these two changes have in common?
baking cookies
melting wax | [
"Both are caused by cooling.",
"Both are only physical changes.",
"Both are caused by heating.",
"Both are chemical changes."
] | 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.
Baking cookies is a chemical change. The type of matter in the cookie dough changes when it is baked. The cookie dough turns into cookies!
Melting wax is a change of state. So, it is a physical change. The wax changes from solid to liquid. But it is still made of the same type of matter... | |
Which of these states is farthest north? | [
"Florida",
"Connecticut",
"Nebraska",
"Vermont"
] | 3 | closed choice | grade2 | 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. Vermont is farthest north. | ||
Not supported with pagination yet | What is the source of the allusion in the sentence below?
Carmen was known among her coworkers for her spartan ways. | [
"Shakespeare",
"Greek history"
] | 1 | closed choice | grade11 | 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.
The protean nature of the disease makes it difficult to diagnose.
The word protean is an allusion to the sea god Proteus in Gree... | The source of the allusion spartan is Greek history.
Soldiers from the city of Sparta in ancient Greece were known for their self-restraint, self-discipline, and indifference to luxury.
The allusion spartan means simple and austere. | |
What can Brendan and Estelle trade to each get what they want? | [
"Brendan can trade his tomatoes for Estelle's carrots.",
"Estelle can trade her broccoli for Brendan's oranges.",
"Estelle can trade her almonds for Brendan's tomatoes.",
"Brendan can trade his tomatoes for Estelle's broccoli."
] | 3 | 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.
Brendan and Estelle open their lunch boxes in the school cafeteria. Neither Brendan nor Estelle got everything that they wanted. ... | closed choice | grade7 | social science | economics | Basic economic principles | Trade and specialization | Look at the table and images.
Brendan wants broccoli. Estelle wants tomatoes. They can trade tomatoes for broccoli to both get what they want. Trading other things would not help both people get more items they want. | ||
Not supported with pagination yet | What information supports the conclusion that Kimi inherited this trait? | [
"Kimi's father has brown eyes. He passed this trait down to Kimi.",
"Kimi's hair is the same color as her brown eyes."
] | 0 | Read the description of a trait.
Kimi has brown eyes. | 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... | |
Is the water in a waterfall a solid, a liquid, or a gas? | [
"a liquid",
"a solid",
"a gas"
] | 0 | 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... | The water in a waterfall is a liquid. A liquid can change shape. But it still takes up the same amount of space.
As water flows down a waterfall, the water changes shape. | ||
Will these magnets attract or repel each other? | [
"repel",
"attract"
] | 1 | Two magnets are placed as shown. | closed choice | grade5 | natural science | physics | Magnets | Identify magnets that attract or repel | Magnets can pull or push on other magnets without touching them. When magnets attract, they pull together. When magnets repel, they push apart. These pulls and pushes are called magnetic forces.
Magnetic forces are strongest at the magnets' poles, or ends. Every magnet has two poles: a north pole (N) and a south pole (... | To predict if these magnets will attract or repel, look at which poles are closest to each other.
The south pole of one magnet is closest to the north pole of the other magnet. Opposite poles attract. So, these magnets will attract each other. | |
Not supported with pagination yet | Select the mammal. | [
"western toad",
"coral snake",
"gray wolf",
"grass frog"
] | 2 | closed choice | grade5 | natural science | biology | Classification | Identify mammals, birds, fish, reptiles, and amphibians | Mammals have hair or fur and feed their young milk. | A gray wolf is a mammal. It has fur and feeds its young milk.
Wolves often live in family groups. A wolf mother, father, and their children travel together.
A coral snake is a reptile. It has scaly, waterproof skin.
Coral snakes spend most of their time underground or hiding under leaves.
A western toad is an amphibian... | |
Not supported with pagination yet | Would you find the word seat on a dictionary page with the following guide words?
shingle - steak | [
"no",
"yes"
] | 0 | yes or no | grade4 | 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 seat is not between the guide words shingle - steak, it would not be found on that page. | |
Which bird's beak is also adapted to catch insects? | [
"European robin",
"military macaw"
] | 0 | Sand martins eat insects and other small invertebrates. The shape of the 's beak is adapted to catch insects.
Figure: sand martin. | closed choice | grade4 | natural science | biology | Adaptations | Animal adaptations: beaks, mouths, and necks | An adaptation is an inherited trait that helps an organism survive or reproduce. Adaptations can include both body parts and behaviors.
The shape of a bird's beak is one example of an adaptation. Birds' beaks can be adapted in different ways. For example, a sharp hooked beak might help a bird tear through meat easily. ... | Look at the picture of the sand martin.
A short, thin beak is light and easy to move. The sand martin uses its beak to grab fast-moving insects while flying.
Now look at each bird. Figure out which bird has a similar adaptation.
The European robin has a short, thin beak. Its beak is adapted to catch insects.
The milita... | |
Not supported with pagination yet | What kind of sentence is this?
This sauce is so spicy that it made me cry! | [
"interrogative",
"exclamatory"
] | 1 | 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 tells about something, but it shows strong feeling and ends with an exclamation point. It is an exclamatory sentence. | |
Which better describes the Great Basin Desert ecosystem? | [
"It has dry, thin soil. It also has long, cold winters.",
"It has heavy snow. It also has only a few types of trees."
] | 0 | Figure: Great Basin Desert.
The Great Basin Desert is a cold desert ecosystem in the western United States. | 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 cold desert is a type of ecosystem. Cold deserts have the following features: a small amount of rain or snow, dry, thin soil, and long, cold winters. So, the Great Basin Desert has dry, thin soil. It also has long, cold winters. | |
Not supported with pagination yet | Is teaching dance a good or a service? | [
"a service",
"a good"
] | 0 | closed choice | grade3 | social science | economics | Basic economic principles | Goods and services | Everything you can buy is either a good or a service.
A good is something you can touch or hold in your hands. For example, a hammer is a good.
A service is a job you pay someone else to do. For example, cooking food in a restaurant is a service. | To decide whether teaching dance is a good or a service, ask these questions:
Is teaching dance something you can touch? No.
Is teaching dance a job you might pay someone else to do? Yes.
So, teaching dance is a service. | |
Not supported with pagination yet | Is the following trait inherited or acquired?
Aubrey has a scar on her right hand. | [
"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. | |
Which of the following fossils is younger? Select the more likely answer. | [
"dinosaur footprint",
"wood"
] | 0 | This diagram shows fossils in an undisturbed sedimentary rock sequence. | closed choice | grade7 | 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 younger:
The dinosaur footprint fossil is in a shallower layer in the rock sequence than the wood fossil. So, the dinosaur footprint fossil is most likely younger than the wood fossil. | |
Not supported with pagination yet | Select the vertebrate. | [
"brown pelican",
"fly",
"banana slug",
"redback spider"
] | 0 | Hint: Mammals, birds, fish, reptiles, and amphibians are vertebrates. | 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... | Like other spiders, a redback spider is an invertebrate. It does not have a backbone. It has an exoskeleton.
A fly is an insect. Like other insects, a fly is an invertebrate. It does not have a backbone. It has an exoskeleton.
A brown pelican is a bird. Like other birds, a brown pelican is a vertebrate. It has a backbo... |
Which bird's beak is also adapted to tear through meat? | [
"roseate spoonbill",
"California condor"
] | 1 | Black vultures are scavengers. They find and eat the bodies of dead animals. The shape of the 's beak is adapted to tear through meat.
Figure: black vulture. | closed choice | grade4 | natural science | biology | Adaptations | Animal adaptations: beaks, mouths, and necks | An adaptation is an inherited trait that helps an organism survive or reproduce. Adaptations can include both body parts and behaviors.
The shape of a bird's beak is one example of an adaptation. Birds' beaks can be adapted in different ways. For example, a sharp hooked beak might help a bird tear through meat easily. ... | Look at the picture of the black vulture.
The black vulture has a sharp hooked beak. Its beak is adapted to tear through meat. The sharp hook can help the black vulture cut the meat into pieces it can swallow.
Now look at each bird. Figure out which bird has a similar adaptation.
The California condor has a sharp hooke... | |
Not supported with pagination yet | Select the one substance that is not a rock. | [
"A computer processor is made by humans. It is not a pure substance.",
"Slate is not a pure substance. It is a solid.",
"Calcarenite is not a pure substance. It is formed in nature."
] | 0 | closed choice | grade4 | natural science | earth-science | Rocks and minerals | Identify rocks using properties | Rocks are made of minerals. Here are some properties of rocks:
They are solid.
They are formed in nature.
They are not made by living things.
They are not pure substances. | Compare the properties of each substance to the properties of rocks. Select the substance whose properties do not match those of rocks.
Calcarenite is a rock.
Slate is a rock.
A computer processor is made by humans. But rocks are not made by living things.
So, a computer processor is not a rock. | |
Which of the following fossils is older? Select the more likely answer. | [
"crocodile egg",
"fern"
] | 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 crocodile egg fossil is in a deeper layer in the rock sequence than the fern fossil. So, the crocodile egg fossil is most likely older than the fern fossil. | |
Not supported with pagination yet | How long is a leather belt? | [
"80 meters",
"80 millimeters",
"80 centimeters",
"80 kilometers"
] | 2 | 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 leather belt is 80 centimeters.
80 millimeters is too short. 80 meters and 80 kilometers are too long. |
How often is the Nobel Peace Prize given out? | [
"every year",
"every other year"
] | 0 | Read the passage about Malala Yousafzai and the Nobel Peace Prize.
The Nobel Peace Prize is given to people who work to make the world a better place. Winners are picked once a year. They get a gold medal and some prize money, too.
The youngest Nobel Peace Prize winner was Malala Yousafzai. She was seventeen years old.... | closed choice | grade2 | language science | reading-comprehension | Independent reading comprehension | Read and understand informational passages | Look at the passage. It tells you how often the Nobel Peace Prize is given out.
The Nobel Peace Prize is given to people who work to make the world a better place. Winners are picked once a year. They get a gold medal and some prize money, too. | ||
Not supported with pagination yet | Which sentence states a fact? | [
"Five South American countries border Peru: Bolivia, Brazil, Chile, Colombia, and Ecuador.",
"Of the five South American countries that border Peru, Brazil is the most important."
] | 0 | closed choice | grade5 | social science | civics | Social studies skills | Identify facts and opinions | A fact is something that can be proved to be true. Facts can be proved by observing, measuring, or studying information.
The flag of the United States has 13 stripes.
This is a fact. It can be proved by looking at the flag and counting the number of stripes.
An opinion is something that a person believes, thinks, or fe... | The second sentence states a fact.
Five South American countries border Peru: Bolivia, Brazil, Chile, Colombia, and Ecuador.
It can be proved by checking a map of South America.
The first sentence states an opinion.
Of the five South American countries that border Peru, Brazil is the most important.
Most important show... | |
Not supported with pagination yet | Would you find the word wring on a dictionary page with the following guide words?
wand - window | [
"yes",
"no"
] | 1 | yes or no | grade7 | language science | reference-skills | Reference skills | Use guide words | Guide words appear on each page of a dictionary. They tell you the first word and last word on the page. The other words on the page come between the guide words in alphabetical order.
To put words in alphabetical order, put them in order by their first letters. If the first letters are the same, look at the second let... | Put the words in alphabetical order.
Since wring is not between the guide words wand - window, it would not be found on that page. | |
Not supported with pagination yet | Select the one substance that is not a mineral. | [
"An antler is made by a living thing. It is a solid.",
"Chrysotile is a solid. It is a pure substance.",
"Pyrite is not made by living things. It is formed in nature."
] | 0 | 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.
An antler is made by a living thing. But minerals are not made by living things.
So, an antler is not a mineral.
Pyrite is a mineral.
Chrysotile is a mineral. | |
Which country is highlighted? | [
"Grenada",
"Saint Vincent and the Grenadines",
"Barbados",
"Haiti"
] | 1 | closed choice | grade6 | social science | geography | The Americas: geography | Identify and select countries of the Caribbean | This country is Saint Vincent and the Grenadines. | |||
Select the organism in the same species as the spot-fin porcupinefish. | [
"Procambarus clarkii",
"Syngnathoides biaculeatus",
"Diodon hystrix"
] | 2 | This organism is a spot-fin porcupinefish. Its scientific name is Diodon hystrix. | closed choice | grade5 | natural science | biology | Scientific names | Use scientific names to classify organisms | Scientists use scientific names to identify organisms. Scientific names are made of two words.
The first word in an organism's scientific name tells you the organism's genus. A genus is a group of organisms that share many traits.
A genus is made up of one or more species. A species is a group of very similar organisms... | A spot-fin porcupinefish's scientific name is Diodon hystrix.
Syngnathoides biaculeatus does not have the same scientific name as a spot-fin porcupinefish. So, Diodon hystrix and Syngnathoides biaculeatus are not in the same species.
Procambarus clarkii does not have the same scientific name as a spot-fin porcupinefish... | |
Not supported with pagination yet | Which closing is correct for a letter? | [
"Sincerely,\nLuke",
"sincerely,\nLuke"
] | 0 | closed choice | grade2 | language science | capitalization | Capitalization | Greetings and closings of letters | A letter starts with a greeting and ends with a closing. For each one, capitalize the first word and end with a comma. You should also capitalize proper nouns, such as Aunt Sue.
Dear Aunt Sue,
I'm glad you could come to my party, and
thank you for the birthday gift. I could not have
asked for a better one! Every time I... | The first closing is correct:
Its first word is capitalized, and it ends with a comma. | |
Not supported with pagination yet | What do these two changes have in common?
adding dish soap to water in a sink
sediment settling to the bottom of a muddy puddle | [
"Both are caused by heating.",
"Both are only physical changes.",
"Both are chemical changes.",
"Both are caused by cooling."
] | 1 | 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.
Adding dish soap to water in a sink is a physical change. Bubbles may appear if air gets trapped in the soapy water, but a different type of matter does not form.
Loose matter such as sand and dirt is called sediment. Sediment settling to the bottom of a muddy puddle is a physical chang... | |
Not supported with pagination yet | Select the vertebrate. | [
"Canadian lynx",
"hissing cockroach",
"day octopus",
"yellow jacket"
] | 0 | Hint: Mammals, birds, fish, reptiles, and amphibians are vertebrates. | 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 yellow jacket is an insect. Like other insects, a yellow jacket is an invertebrate. It does not have a backbone. It has an exoskeleton.
Like other octopuses, a day octopus is an invertebrate. It does not have a backbone. It has a soft body.
A Canadian lynx is a mammal. Like other mammals, a Canadian lynx is a vertebr... |
Which country is highlighted? | [
"Vanuatu",
"Nauru",
"New Zealand",
"Kiribati"
] | 1 | closed choice | grade7 | social science | geography | Oceania: geography | Identify and select countries of Oceania | This country is Nauru. | |||
Not supported with pagination yet | Which is a simple sentence? | [
"Mr. Rudd's afternoon lecture was about art and culture in Germany before World War II.",
"I don't believe in superstitions, but my mother takes them quite seriously."
] | 0 | closed choice | grade5 | language science | grammar | Sentences, fragments, and run-ons | Is the sentence simple, compound, or complex? | A clause is a group of words that contains both a subject and a predicate.
An independent clause is a complete thought. It can stand alone as a sentence. A dependent clause is not a complete thought. It cannot stand alone as a sentence.
the oranges on our tree are ripe
The clause can stand alone. It is independent.
aft... | The first sentence is the simple sentence. It is a single independent clause.
Mr. Rudd's afternoon lecture was about art and culture in Germany before World War II. | |
Not supported with pagination yet | Which text uses the word disinterested in its traditional sense? | [
"As an experienced teacher of American history, Mr. Larsen believes that playing history-based trivia games will revive even the most disinterested of students.",
"As a teacher of American history, Mr. Larsen tries to remain disinterested when discussing controversial issues, giving equal attention and considerat... | 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 disinterested in its traditional sense: unbiased or impartial.
As a teacher of American history, Mr. Larsen tries to remain disinterested when discussing controversial issues, giving equal attention and consideration to each major viewpoint.
The second text uses disinterested in its nontraditional s... | |
Not supported with pagination yet | Which is the stickiest? | [
"leather belt",
"gum",
"silk kimono"
] | 1 | closed choice | grade4 | natural science | physics | Materials | Compare properties of materials | Every object is made of one or more materials. A material is a type of matter. Wood, glass, metal, and plastic are common materials.
A material has different properties. A material's properties tell you how it looks, feels, tastes, or smells. Some examples of properties are shiny, hard, fragile, and stretchy.
For examp... | Sticky is a property. A sticky material easily attaches to other things.
Look at each picture, one at a time. Imagine touching the material shown in each picture.
Of the choices, the gum is the stickiest. If you step on chewed gum, it will stick to your foot. | |
What is the capital of Maryland? | [
"Boston",
"Baltimore",
"Annapolis",
"Honolulu"
] | 2 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the Northeast | Annapolis is the capital of Maryland. | |||
Which of these cities is marked on the map? | [
"Nashville",
"Austin",
"Memphis",
"New Orleans"
] | 0 | closed choice | grade4 | social science | geography | Cities | Cities of the Southeast | The city is Nashville, Tennessee. Austin, New Orleans, and Memphis are marked with gray circles on the map below. | |||
What is the probability that a rainbow trout produced by this cross will be homozygous recessive for the body color gene? | [
"0/4",
"3/4",
"4/4",
"2/4",
"1/4"
] | 0 | In a group of rainbow trout, some individuals have a greenish-brown body and others have a blue body. In this group, the gene for the body color trait has two alleles. The allele for a blue body (b) is recessive to the allele for a greenish-brown body (B).
This Punnett square shows a cross between two rainbow trout. | 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 name of the colony shown? | [
"New Hampshire",
"New Jersey",
"Maine",
"Pennsylvania"
] | 1 | closed choice | grade8 | social science | us-history | Colonial America | Identify the Thirteen Colonies | The colony is New Jersey. | |||
Not supported with pagination yet | Which sentence states a fact? | [
"Computers make life better for people.",
"Bill Gates was a founder of Microsoft."
] | 1 | closed choice | grade5 | social science | civics | Social studies skills | Identify facts and opinions | A fact is something that can be proved to be true. Facts can be proved by observing, measuring, or studying information.
The flag of the United States has 13 stripes.
This is a fact. It can be proved by looking at the flag and counting the number of stripes.
An opinion is something that a person believes, thinks, or fe... | The first sentence states a fact.
Bill Gates was a founder of Microsoft.
It can be proved by reading about the history of Microsoft.
The second sentence states an opinion.
Computers make life better for people.
Better shows what a person believes, thinks, or feels. Another person might have a different opinion about wh... | |
Not supported with pagination yet | Which organ gives the body its structure and allows it to move? | [
"brain",
"heart",
"skin",
"skeleton"
] | 3 | closed choice | grade5 | natural science | biology | Animals | Human organs and their functions | |||
Which material is this garbage can made of? | [
"rock",
"metal"
] | 1 | closed choice | grade2 | natural science | physics | Materials | Identify materials in objects | A material is a type of matter. Wood, glass, metal, and plastic are common materials. | Look at the picture of the garbage can.
The garbage can is made of metal.
Metal can be pressed into many different shapes. It also is a strong material. Metal objects can be dropped a lot without breaking. | ||
Not supported with pagination yet | What do these two changes have in common?
a piece of avocado turning brown
burning a marshmallow over a campfire | [
"Both are only physical changes.",
"Both are caused by cooling.",
"Both are chemical changes.",
"Both are caused by heating."
] | 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 piece of avocado turning brown is a chemical change. The avocado reacts with oxygen in the air to form a different type of matter.
If you scrape off the brown part of the avocado, the inside will still be green. The inside hasn't touched the air. So the chemical change hasn't happened... | |
Which solution has a higher concentration of yellow particles? | [
"Solution B",
"Solution A",
"neither; their concentrations are the same"
] | 0 | The diagram below is a model of two solutions. Each yellow 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 yellow particles represent the solute. To figure out which solution has a higher concentration of yellow particles, look at both the number of yellow particles and the volume of the solvent in each container.
Use the concentration formula to find the number of yellow particles per mill... | |
Which statement describes the Peary Land ecosystem? | [
"It has dry, thin soil that is rich in nutrients.",
"It has many evergreen trees.",
"It has long, cold winters and short, cold summers."
] | 2 | Figure: Peary Land.
Peary Land is a tundra ecosystem in northern Greenland. It is part of Northeast Greenland National Park. That park is one of the largest national parks in the world, covering about 375,000 square miles. | closed choice | grade8 | 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 tundra is a type of ecosystem. Tundras have the following features: long, cold winters and short, cold summers, soil that is frozen year-round, and mostly small plants. So, the following statement describes the Peary Land ecosystem: long, cold winters and short, cold summers, soil that is frozen year-round, and mostl... | |
Which country is highlighted? | [
"Nauru",
"Palau",
"Kiribati",
"the Federated States of Micronesia"
] | 1 | closed choice | grade8 | social science | geography | Oceania: geography | Identify and select countries of Oceania | This country is Palau. | |||
Not supported with pagination yet | What information supports the conclusion that Lucy inherited this trait? | [
"Lucy's parents were born with wavy hair. They passed down this trait to Lucy.",
"Lucy and her mother both have short hair."
] | 0 | Read the description of a trait.
Lucy has wavy hair. | closed choice | grade6 | natural science | biology | Genes to traits | Inherited and acquired traits: use evidence to support a statement | Organisms, including people, have both inherited and acquired traits. Inherited and acquired traits are gained in different ways.
Inherited traits are passed down from biological parents to their offspring through genes. Genes are pieces of hereditary material that contain the instructions that affect inherited traits.... | |
Which property do these four objects have in common? | [
"rough",
"fuzzy",
"salty"
] | 2 | Select the best answer. | closed choice | grade5 | 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.
Potato chips have a salty taste. All four objects are salty.
A fuzzy object is covered in soft hair. The cracker is not fuzzy.
A rough object feels scratchy when you touch it. The potato chips and the cracker are rough, but the ocean water is not.
Th... | |
Not supported with pagination yet | What do these two changes have in common?
snowflakes forming in a cloud
water boiling on a stove | [
"Both are caused by heating.",
"Both are chemical changes.",
"Both are only physical changes.",
"Both are caused by cooling."
] | 2 | 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.
Snowflakes forming in a cloud is a change of state. So, it is a physical change. Liquid water freezes and becomes solid, but it is still made of water. A different type of matter is not formed.
Water boiling on the stove is a change of state. So, it is a physical change. The liquid chan... | |
Which continent is highlighted? | [
"North America",
"Antarctica",
"Europe",
"Asia"
] | 3 | closed choice | grade8 | 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 Asia. | ||
Which animal's skin is better adapted as a warning sign to ward off predators? | [
"golden dart frog",
"lichen katydid"
] | 0 | Opalescent nudibranchs have stinging cells in their brightly colored skin. The bright colors serve as a warning sign that the animal is toxic and dangerous. The 's skin is adapted to ward off predators.
Figure: opalescent nudibranch. | closed choice | grade4 | 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 opalescent nudibranch.
The opalescent nudibranch has stinging cells in its brightly colored skin. Its skin is adapted to ward off predators. The bright colors serve as a warning sign that the opalescent nudibranch is toxic and dangerous.
Now look at each animal. Figure out which animal has a ... | |
Not supported with pagination yet | Which object has the least thermal energy? | [
"a 350-gram mug of cocoa at a temperature of 151°F",
"a 350-gram mug of cocoa at a temperature of 115°F",
"a 350-gram mug of cocoa at a temperature of 118°F"
] | 1 | The objects are identical except for their temperatures. | closed choice | grade4 | 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 slow down, the temperature goes down. The matter now has both ... | All three mugs of cocoa have the same mass but different temperatures. Since the 115°F mug of cocoa is the coldest, it has the least thermal energy. |
Not supported with pagination yet | Which phrase has a more negative connotation? | [
"surprise someone",
"startle someone"
] | 1 | closed choice | grade4 | language science | vocabulary | Shades of meaning | Positive and negative connotation | Connotation is the feeling or idea that goes along with a word or phrase. Some words are close in meaning but have different connotations.
For example, think about the words eager and impatient. They both mean wanting something to happen, but they have different connotations.
Eager has a positive connotation. It is a n... | Startle someone has a more negative connotation. If you startle someone, you surprise them in a bad way. | |
Not supported with pagination yet | Select the living thing. | [
"chair",
"orca"
] | 1 | closed choice | grade3 | natural science | biology | Classification | Identify living and nonliving things | All living things need food and water. Water helps living things break down food and remove waste. Food gives living things energy. Living things use this energy to grow and change. All living things grow and change during their lives.
All living things sense changes in the world around them. Living things might sense ... | A chair is not a living thing.
Chairs do not have all of the traits of living things. They do not grow or respond to the world around them. They do not need food or water.
An orca is a living thing.
Orcas grow and respond to the world around them. They need food and water. | |
What is the capital of Delaware? | [
"Concord",
"Trenton",
"Georgetown",
"Dover"
] | 3 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the Northeast | Dover is the capital of Delaware. | |||
What is the capital of Connecticut? | [
"Dover",
"Providence",
"Hartford",
"New Haven"
] | 2 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the Northeast | Hartford is the capital of Connecticut. | |||
What is the capital of Arkansas? | [
"Raleigh",
"Fargo",
"Charleston",
"Little Rock"
] | 3 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the Southeast | Little Rock is the capital of Arkansas. | |||
Not supported with pagination yet | Would you find the word hardly on a dictionary page with the following guide words?
herring - hump | [
"yes",
"no"
] | 1 | yes or no | grade6 | 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 hardly is not between the guide words herring - hump, it would not be found on that page. | |
Which solution has a higher concentration of pink particles? | [
"Solution B",
"neither; their concentrations are the same",
"Solution A"
] | 0 | The diagram below is a model of two solutions. Each pink ball represents one particle of solute. | closed choice | grade6 | natural science | chemistry | Solutions | Compare concentrations of solutions | A solution is made up of two or more substances that are completely mixed. In a solution, solute particles are mixed into a solvent. The solute cannot be separated from the solvent by a filter. For example, if you stir a spoonful of salt into a cup of water, the salt will mix into the water to make a saltwater solution... | In Solution A and Solution B, the pink particles represent the solute. To figure out which solution has a higher concentration of pink particles, look at both the number of pink particles and the volume of the solvent in each container.
Use the concentration formula to find the number of pink particles per milliliter.
... | |
Not supported with pagination yet | Which word means a small, young plant? | [
"seedling",
"germination",
"chlorophyll"
] | 0 | closed choice | grade4 | natural science | biology | Plants | Describe and construct conifer life cycles | Conifers are plants that grow cones. Conifers use their cones to reproduce, or make new plants like themselves. How do conifers use their cones to reproduce?
Conifers can grow male and female cones. Male cones make pollen, and female cones make eggs. Pollination is what happens when wind blows pollen from male cones on... | A seedling is a small, young plant. A seedling will grow into an adult plant.
Germination is what happens when a seed begins to grow. | |
Not supported with pagination yet | What is the volume of an eyedropper? | [
"9 milliliters",
"9 liters"
] | 0 | 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 an eyedropper is 9 milliliters.
9 liters is too much. |
Not supported with pagination yet | Suppose Jordan decides to get the chocolate-chip cookie dough ice cream. Which result would be a cost? | [
"Jordan will get a free waffle cone. He will enjoy the waffle cone.",
"Jordan will give up the chance to eat the butter pecan ice cream. He likes this flavor more than chocolate-chip cookie dough."
] | 1 | Jordan is deciding whether to get butter pecan ice cream or chocolate-chip cookie dough ice cream. He likes butter pecan more than chocolate-chip cookie dough. But a scoop of chocolate-chip cookie dough ice cream comes with a free waffle cone. | 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 Jordan wants or needs:
Jordan will give up the chance to eat the butter pecan ice cream. He likes this flavor more than chocolate-chip cookie dough. |
Which solution has a higher concentration of purple particles? | [
"Solution A",
"neither; their concentrations are the same",
"Solution B"
] | 0 | The diagram below is a model of two solutions. Each purple 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 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... | |
Not supported with pagination yet | Based on this information, what is this plant's phenotype for the pea shape trait? | [
"round peas",
"wrinkled peas"
] | 1 | In a group of pea plants, some individuals have round peas and others have wrinkled peas. In this group, the gene for the pea shape trait has two alleles. The allele for round peas (E) is dominant over the allele for wrinkled peas (e).
A certain pea plant from this group has the homozygous genotype ee for the pea shape... | 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 ... | The pea plant's genotype for the pea shape gene is ee. The pea plant's genotype of ee has only e alleles. The e allele is for wrinkled peas. So, the pea plant's phenotype for the pea shape trait must be wrinkled peas.
To check this answer, consider whether the pea plant's alleles are dominant or recessive. The allele f... |
Which ocean is highlighted? | [
"the Pacific Ocean",
"the Arctic Ocean",
"the Atlantic Ocean",
"the Indian Ocean"
] | 0 | closed choice | grade8 | social science | geography | Physical Geography | Oceans and continents | Oceans are huge bodies of salt water. The world has five oceans. All of the oceans are connected, making one world ocean. | This is the Pacific Ocean. | ||
Which continent is highlighted? | [
"North America",
"Australia",
"Asia",
"Europe"
] | 2 | closed choice | grade5 | social science | geography | Oceans and continents | Identify oceans and continents | A continent is one of the major land masses on the earth. Most people say there are seven continents. | This continent is Asia. | ||
Not supported with pagination yet | What information supports the conclusion that Marcy inherited this trait? | [
"Marcy's parents have dark skin. They passed down this trait to Marcy.",
"Marcy and her father both have dark hair."
] | 0 | Read the description of a trait.
Marcy has dark skin. | 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... | |
Is chert a mineral or a rock? | [
"mineral",
"rock"
] | 1 | Chert has the following properties:
not a pure substance
found in nature
made up of very fine sediment grains
no fixed crystal structure
solid
not made by living things | closed choice | grade8 | natural science | earth-science | Rocks and minerals | Identify rocks and minerals | 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... | The properties of chert match the properties of a rock. So, chert is a rock. | |
Not supported with pagination yet | Which figure of speech is used in this text?
The hum of the computer concerned Omar. Was the problem with the power supply or the hard drive? | [
"simile",
"onomatopoeia"
] | 1 | closed choice | grade6 | language science | figurative-language | Literary devices | Classify figures of speech | Figures of speech are words or phrases that use language in a nonliteral or unusual way. They can make writing more expressive.
Alliteration is the repetition of sounds at the beginning of nearby words.
What a lucky little lady you are!
An allusion is a brief reference to something or someone well known, often from his... | The text uses onomatopoeia, a word that expresses a sound.
Hum represents the sound the computer was making. | |
Which of the following was a dependent variable in this experiment? | [
"the temperature of the soda",
"the size of the ice pieces"
] | 0 | The passage below describes an experiment. Read the passage and think about the variables that are described.
Arianna's brother thought that crushed ice would keep his soda cooler than whole ice cubes.
To test this idea, Arianna divided a large bottle of soda equally among six glasses. Arianna added five whole ice cub... | 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... | ||
Select the organism in the same genus as the Steller's sea eagle. | [
"Pelecanus rufescens",
"Falco novaeseelandiae",
"Haliaeetus pelagicus"
] | 2 | This organism is a Steller's sea eagle. Its scientific name is Haliaeetus pelagicus. | closed choice | grade8 | 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... | A Steller's sea eagle's scientific name is Haliaeetus pelagicus. The first word of its scientific name is Haliaeetus.
This organism and the Steller's sea eagle are in the same genus and the same species! Both organisms have the same scientific name, Haliaeetus pelagicus.
Falco novaeseelandiae is in the genus Falco. The... | |
Not supported with pagination yet | What is the source of the allusion in the sentence below?
Dave says that he would not be the person he is today were it not for his childhood, which he describes as Dickensian. | [
"literature",
"a poem"
] | 0 | closed choice | grade11 | 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.
The protean nature of the disease makes it difficult to diagnose.
The word protean is an allusion to the sea god Proteus in Gree... | The source of the allusion Dickensian is literature.
The works of British author Charles Dickens often featured characters struggling to survive in settings such as debtors' prisons and orphanages.
The allusion Dickensian means harsh or poverty-stricken. | |
Not supported with pagination yet | Which logical fallacy is used in the text?
I understand that you had a medical emergency, but I still cannot accept late homework. If I make an exception for you, I'll have to make exceptions for everybody. | [
"slippery slope fallacy: the false assumption that a small first step will lead to extreme consequences",
"bandwagon fallacy: the assumption that the popular choice is automatically correct",
"false causation: the assumption that because two things happened together, one caused the other"
] | 0 | 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 making an exception for one student because of a medical emergency will lead to making exceptions for all students. However, making an exception for a particular situation does not mean the teacher must make exceptions for all situations. This illustrates a type of logical fallacy known as the slip... | |
Will these magnets attract or repel each other? | [
"attract",
"repel"
] | 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 north pole of the other magnet. Poles that are different attract. So, these magnets will attract each other. | |
Which of the following could Isabelle and Kayla's test show? | [
"if the concrete from each batch took the same amount of time to dry",
"if a new batch of concrete was firm enough to use"
] | 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 | grade6 | 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... | ||
Will these magnets attract or repel each other? | [
"repel",
"attract"
] | 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.
Both poles of each magnet line up with both poles of the other magnet. The south pole of each magnet is closest to the north pole of the other magnet. Opposite poles attract. So, these magnets will attract each other. | |
Select the organism in the same genus as the American bullfrog. | [
"Hyla cinerea",
"Lithobates palustris",
"Agalychnis callidryas"
] | 1 | This organism is an American bullfrog. Its scientific name is Lithobates catesbeianus. | closed choice | grade8 | 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 American bullfrog's scientific name is Lithobates catesbeianus. The first word of its scientific name is Lithobates.
Hyla cinerea is in the genus Hyla. The first word of its scientific name is Hyla. So, Hyla cinerea and Lithobates catesbeianus are not in the same genus.
Lithobates palustris is in the genus Lithobate... | |
Not supported with pagination yet | Which word would you find on a dictionary page with the following guide words?
alley - associate | [
"aquarium",
"absence"
] | 0 | closed choice | grade6 | 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 aquarium is between the guide words alley - associate, it would be found on that page. | |
Not supported with pagination yet | What information supports the conclusion that Gabe acquired this trait? | [
"Gabe learned to identify insects by reading many books about insects.",
"Gabe likes to look at butterflies and beetles."
] | 0 | Read the description of a trait.
Gabe is good at identifying insects. | 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 | Which is a compound sentence? | [
"Mom doesn't like diamonds, so Dad gave her a ruby bracelet.",
"The nervous swimmer steps onto the diving platform."
] | 0 | closed choice | grade5 | 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 so.
Mom doesn't like diamonds, so Dad gave her a ruby bracelet. | |
What is the capital of Arizona? | [
"Des Moines",
"Lansing",
"Phoenix",
"Tucson"
] | 2 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the West | Phoenix is the capital of Arizona. |
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.