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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
What is the capital of Minnesota? | [
"Saint Paul",
"Fort Wayne",
"Indianapolis",
"Columbus"
] | 0 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the Midwest | Saint Paul is the capital of Minnesota. | |||
Which of the following organisms is the secondary consumer in this food web? | [
"phytoplankton",
"black rockfish",
"zooplankton",
"sea urchin"
] | 1 | Below is a food web from an ocean ecosystem in Monterey Bay, off the coast of California.
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 | grade8 | 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... | Secondary consumers eat primary consumers, and primary consumers eat producers. So, in a food web, secondary consumers have arrows pointing to them from primary consumers. Primary consumers have arrows pointing to them from producers.
The sea urchin has an arrow pointing to it from the kelp. The kelp is not a primary c... | |
Not supported with pagination yet | Which correctly shows the title of a play? | [
"all in the Stars",
"All in the Stars"
] | 1 | closed choice | grade4 | language science | capitalization | Formatting | Capitalizing titles | In a title, capitalize the first word, the last word, and every important word in between.
The Wind in the Willows James and the Giant Peach
These words are not important in titles:
Articles, a, an, the
Short prepositions, such as at, by, for, in, of, on, to, up
Coordinating conjunctions, such as and, but, or | Capitalize the first word, the last word, and every important word in between. The words in and the are not important, so they should not be capitalized.
The correct title is All in the Stars. | |
Not supported with pagination yet | Which of the following contains a vague pronoun reference? | [
"Emma placed the walnuts in a wooden bowl after she separated them from the shells.",
"After Emma separated the walnuts from the shells, she placed them in a wooden bowl."
] | 1 | closed choice | grade6 | language science | pronouns | 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 them could refer to the walnuts or the shells.
After Emma separated the walnuts from the shells, she placed them in a wooden bowl.
The first answer choice shows a possible correction for the vague pronoun reference. The text has been rewritten so ... | |
Not supported with pagination yet | Choose the poem that has a regular rhythm, or a pattern of sound like a beat. | [
"To the dust cave—\nhe loves dust, he hoards it,\ngathers it in mountains,\nblows it into clouds,\nblue clouds, green clouds, yellow clouds, gold—",
"How does the little crocodile\nImprove his shining tail,\nAnd pour the waters of the Nile\nOn every golden scale!"
] | 1 | From Lewis Carroll, "The Crocodile" and from Alfred Kreymborg, "Chains" | closed choice | grade4 | language science | reading-comprehension | Poetry elements | Identify elements of poetry | Poetry is a special kind of writing. It has many elements that make it different from ordinary writing. Knowing these elements can help you talk about poetry, understand it better, and enjoy it more.
A poem rhymes when it has a pattern of words that end in the same sound.
End rhyme is when the rhymes appear at the end ... | This poem has a regular rhythm, or a pattern of sound like a beat. The parts in bold show the strong syllables. The pattern is a weak syllable followed by a strong syllable. It sounds like da-DUM da-DUM.
On every golden scale! |
Not supported with pagination yet | What does the metaphor in this text suggest?
When Malik lost his job, he was devastated. The only light in the sea of darkness was the prospect of pursuing a new career. | [
"There was a benefit to Malik's job loss.",
"Malik felt in the dark about what to do after losing his job."
] | 0 | closed choice | grade8 | language science | figurative-language | Literary devices | Interpret figures of speech | Figures of speech are words or phrases that use language in a nonliteral or unusual way. They can make writing more expressive.
A metaphor compares two things that are not actually alike without using like or as.
The snow formed a blanket over the town. | The text uses a metaphor, comparing two things that are not actually alike without using like or as.
The metaphor the only light in the sea of darkness was the prospect of pursuing a new career suggests that there was a benefit to Malik's job loss. A light would be beneficial in helping someone escape a dark, difficult... | |
Not supported with pagination yet | A recent news story said a healthy diet is the key to living longer. It said people should eat less meat and more vegetables. What will probably happen to the overall supply of vegetables over the next year? | [
"The supply will probably go down.",
"The supply will probably go up."
] | 1 | closed choice | grade7 | 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... | Most people want to live longer, healthier lives. The news story said that it is healthier to eat less meat and more vegetables. So, there is an expected change in demand for vegetables. Producers will want to sell as many vegetables as they can. So, the supply of vegetables will probably go up. | |
Not supported with pagination yet | What do these two changes have in common?
melting glass
dry ice sublimating and becoming a gas | [
"Both are chemical changes.",
"Both are caused by cooling.",
"Both are caused by heating."
] | 2 | 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.
Melting glass is a change of state. So, it is a physical change. The glass changes from solid to liquid. But a different type of matter is not formed.
Dry ice is solid carbon dioxide. When dry ice gets warm, it changes state and becomes carbon dioxide gas. This change of state, from sol... | |
What can Amanda and Leroy trade to each get what they want? | [
"Leroy can trade his broccoli for Amanda's oranges.",
"Amanda can trade her tomatoes for Leroy's broccoli.",
"Leroy can trade his almonds for Amanda's tomatoes.",
"Amanda can trade her tomatoes for Leroy's carrots."
] | 1 | 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.
Amanda and Leroy open their lunch boxes in the school cafeteria. Neither Amanda nor Leroy got everything that they wanted. The ta... | closed choice | grade8 | social science | economics | Basic economic principles | Trade and specialization | Look at the table and images.
Amanda wants broccoli. Leroy 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. | ||
Which animal's skin is better adapted as a warning sign to ward off predators? | [
"Spanish shawl nudibranch",
"fantastic leaf-tailed gecko"
] | 0 | Sharpnose-puffers are poisonous animals with brightly colored skin. The bright color serves as a warning sign that the animal is poisonous. The 's skin is adapted to ward off predators.
Figure: sharpnose-puffer. | closed choice | grade5 | natural science | biology | Adaptations | Animal adaptations: skins and body coverings | An adaptation is an inherited trait that helps an organism survive or reproduce. Adaptations can include both body parts and behaviors.
The color, texture, and covering of an animal's skin are examples of adaptations. Animals' skins can be adapted in different ways. For example, skin with thick fur might help an animal... | Look at the picture of the sharpnose-puffer.
The sharpnose-puffer has a poisonous body with brightly colored skin. Its skin is adapted to ward off predators. The bright colors serve as a warning sign that the sharpnose-puffer is poisonous.
Now look at each animal. Figure out which animal has a similar adaptation.
The S... | |
Which animal is also adapted to be camouflaged in a sandy desert? | [
"fennec fox",
"scarlet snake"
] | 0 | Bearded dragons are lizards that live in the deserts of Australia. The is adapted to be camouflaged in a sandy desert.
Figure: bearded dragon. | closed choice | grade5 | natural science | biology | Adaptations | Animal adaptations: skins and body coverings | An adaptation is an inherited trait that helps an organism survive or reproduce. Adaptations can include both body parts and behaviors.
The color, texture, and covering of an animal's skin are examples of adaptations. Animals' skins can be adapted in different ways. For example, skin with thick fur might help an animal... | Look at the picture of the bearded dragon.
The bearded dragon has a sand-colored body. It is adapted to be camouflaged in a sandy desert. The word camouflage means to blend in.
Now look at each animal. Figure out which animal has a similar adaptation.
The fennec fox has sand-colored fur covering its skin. It is adapted... | |
Not supported with pagination yet | Using only these supplies, which question can Kenneth investigate with an experiment? | [
"Does a small cloth towel or a large cloth towel dry faster when hung in the backyard?",
"When hung in the laundry room, do black cloth towels or white cloth towels dry more quickly?",
"Do cloth towels dry faster if they are hung in the laundry room or in the backyard?"
] | 2 | After Kenneth cleans up a spill, he hangs a wet cloth towel in the laundry room. Two hours later, he notices that the towel has partially dried. He wonders what factors affect how cloth dries. So, he decides to design an experiment. He has the following supplies available:
two identical white cloth towels
water
a cloth... | closed choice | grade7 | natural science | science-and-engineering-practices | Designing experiments | Identify questions that can be investigated with a set of materials | Experiments can be designed to answer specific questions. When designing an experiment, you must identify the supplies that are necessary to answer your question. In order to do this, you need to figure out what will be tested and what will be measured during the experiment.
Imagine that you are wondering if plants gro... | |
Which animal's limbs are also adapted for climbing trees? | [
"okapi",
"three-toed sloth"
] | 1 | s live in the rain forests of Indonesia and Malaysia. Their limbs are adapted for climbing trees.
Figure: Sumatran orangutan. | closed choice | grade4 | natural science | biology | Adaptations | Animal adaptations: feet and limbs | An adaptation is an inherited trait that helps an organism survive or reproduce. Adaptations can include both body parts and behaviors.
Arms, legs, flippers, and wings are different types of limbs. The type of limbs an animal has is an example of an adaptation. Animals' limbs can be adapted in different ways. For examp... | Look at the picture of the Sumatran orangutan.
The Sumatran orangutan uses its long limbs to reach branches while climbing. It uses its fingers and toes to grab the branches.
Now look at each animal. Figure out which animal has a similar adaptation.
The three-toed sloth has long limbs with fingers and toes. Its limbs a... | |
Not supported with pagination yet | Which tense does the sentence use?
Sam and Annie will swim in the warm pool. | [
"future tense",
"past tense",
"present tense"
] | 0 | closed choice | grade2 | 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 future tense. You can tell because it uses will before the main verb, swim. The verb tells you about something that is going to happen. | |
Which solution has a higher concentration of blue particles? | [
"Solution B",
"neither; their concentrations are the same",
"Solution A"
] | 0 | The diagram below is a model of two solutions. Each blue ball represents one particle of solute. | closed choice | grade8 | 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 blue particles represent the solute. To figure out which solution has a higher concentration of blue particles, look at both the number of blue particles and the volume of the solvent in each container.
Use the concentration formula to find the number of blue particles per milliliter.
... | |
Is a gold bracelet a solid, a liquid, or a gas? | [
"a gas",
"a solid",
"a liquid"
] | 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... | A gold bracelet is a solid. You can wrap a gold bracelet around your wrist. But the bracelet will still have a size and shape of its own. | ||
Not supported with pagination yet | What kind of sentence is this?
Would you like bacon with your eggs? | [
"imperative",
"interrogative"
] | 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 asks something, and it ends with a question mark. It is an interrogative sentence. | |
Not supported with pagination yet | Which object has the least thermal energy? | [
"a watermelon at a temperature of 10°C",
"a watermelon at a temperature of 17°C",
"a watermelon at a temperature of 29°C"
] | 0 | 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 watermelons have the same mass but different temperatures. Since the 10°C watermelon is the coldest, it has the least thermal energy. |
Not supported with pagination yet | What do these two changes have in common?
an old sandwich rotting in a trashcan
a piece of apple turning brown | [
"Both are only physical changes.",
"Both are caused by heating.",
"Both are caused by cooling.",
"Both are chemical changes."
] | 3 | closed choice | grade4 | natural science | chemistry | Physical and chemical change | Compare physical and chemical changes | Chemical changes and physical changes are two common ways matter can change.
In a chemical change, the type of matter changes. The types of matter before and after a chemical change are always different.
Some chemical changes are caused by heating or cooling. For example, burning a piece of paper is a chemical change c... | Step 1: Think about each change.
A sandwich rotting is a chemical change. The matter in the sandwich breaks down and slowly turns into a different type of matter.
A piece of apple turning brown is a chemical change. The apple reacts with oxygen in the air and turns into a different type of matter.
If you scrape off the... | |
Not supported with pagination yet | Would you find the word unite on a dictionary page with the following guide words?
umbrella - usual | [
"yes",
"no"
] | 0 | yes or no | grade2 | language science | reference-skills | Reference skills | Use guide words | Guide words appear on each page of a dictionary. They tell you the first word and last word on the page. The other words on the page come between the guide words in alphabetical order.
To put words in alphabetical order, put them in order by their first letters. If the first letters are the same, look at the second let... | Put the words in alphabetical order.
Since unite is between the guide words umbrella - usual, it would be found on that page. | |
Not supported with pagination yet | Using only these supplies, which question can Amanda investigate with an experiment? | [
"Does a catapult with a longer arm launch a rubber ball farther than a catapult with a shorter arm?",
"Does a heavier ball travel farther than a lighter ball when launched from a catapult?",
"Does a rubber ball travel farther when launched from a metal catapult or from a wooden catapult?"
] | 0 | Amanda visits a museum about ancient Greece. She notices an exhibit with models of wooden catapults that were used to launch large rocks across battlefields. She wonders what factors affect how far a catapult can launch an object. So, she decides to design an experiment. She has the following supplies available:
a wood... | closed choice | grade7 | natural science | science-and-engineering-practices | Designing experiments | Identify questions that can be investigated with a set of materials | Experiments can be designed to answer specific questions. When designing an experiment, you must identify the supplies that are necessary to answer your question. In order to do this, you need to figure out what will be tested and what will be measured during the experiment.
Imagine that you are wondering if plants gro... | |
Not supported with pagination yet | Using only these supplies, which question can Neil investigate with an experiment? | [
"Do toy cars go faster down the ramp made of wood or the ramp made of cardboard?",
"Does a big toy car go down the wooden ramp faster than a small toy car?",
"Do toy cars with plastic wheels go faster down the cardboard ramp than toy cars with metal wheels?"
] | 0 | Neil and his sister are building ramps to race their toy cars down. Neil notices that the cars go down some of the ramps faster than others. He wonders what factors affect the cars' speed. So, he decides to design an experiment. He has the following supplies available:
two identical toy cars
a wooden ramp three feet lo... | closed choice | grade7 | natural science | science-and-engineering-practices | Designing experiments | Identify questions that can be investigated with a set of materials | Experiments can be designed to answer specific questions. When designing an experiment, you must identify the supplies that are necessary to answer your question. In order to do this, you need to figure out what will be tested and what will be measured during the experiment.
Imagine that you are wondering if plants gro... | |
Not supported with pagination yet | What does the allusion in this text suggest?
With the gutters clogged and water rising in the streets, Cara, who was watching the storm from her window, commented, "We're going to need an ark to get out of here." | [
"Cara wants to protect her possessions.",
"Cara thinks the storm will cause major flooding."
] | 1 | closed choice | grade7 | language science | figurative-language | Literary devices | Interpret figures of speech | Figures of speech are words or phrases that use language in a nonliteral or unusual way. They can make writing more expressive.
An allusion is a brief reference to something or someone well known, often from history or literature.
"I'd better get home before I turn into a pumpkin!" Lila remarked. | The text uses an allusion, a brief reference to someone or something well known.
The allusion to an ark suggests that Cara thinks the storm will cause major flooding. In the Bible, it rains for forty days and forty nights; Noah, his family, and animals of every species survive the great flood in an ark that he builds. | |
Not supported with pagination yet | Suppose Hansen decides to plant the oak tree. Which result would be a cost? | [
"The oak tree will use up more space than the irises would have used up.",
"Hansen will get to look at the oak tree. He thinks it will look more beautiful than the irises would have looked."
] | 0 | Hansen is deciding whether to plant irises or an oak tree in his backyard. He wants to make his backyard more beautiful. But he also wants to leave space for doing fun things. | 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 Hansen wants or needs:
The oak tree will use up more space than the irises would have used up. |
Which of these states is farthest south? | [
"West Virginia",
"Maine",
"Louisiana",
"Idaho"
] | 2 | closed choice | grade5 | social science | geography | Maps | Read a map: cardinal directions | Maps have four cardinal directions, or main directions. Those directions are north, south, east, and west.
A compass rose is a set of arrows that point to the cardinal directions. A compass rose usually shows only the first letter of each cardinal direction.
The north arrow points to the North Pole. On most maps, north... | To find the answer, look at the compass rose. Look at which way the south arrow is pointing. Louisiana is farthest south. | ||
Not supported with pagination yet | What kind of sentence is this?
Please cut up the watermelon. | [
"interrogative",
"imperative"
] | 1 | closed choice | grade5 | 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. | |
Which country is highlighted? | [
"The Bahamas",
"Grenada",
"Saint Lucia",
"Saint Vincent and the Grenadines"
] | 3 | closed choice | grade6 | social science | geography | The Americas: geography | Identify and select countries of the Caribbean | This country is Saint Vincent and the Grenadines. | |||
What is the name of the colony shown? | [
"Maryland",
"Pennsylvania",
"Washington, D.C.",
"North Carolina"
] | 0 | closed choice | grade5 | social science | us-history | English colonies in North America | Identify the Thirteen Colonies | The colony is Maryland. | |||
Not supported with pagination yet | Which greeting is correct for a letter? | [
"Dear Dr. nelson,",
"Dear Dr. Nelson,"
] | 1 | closed choice | grade4 | 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. Nelson is capitalized because it is a proper noun. | |
Can Microcebus rufus cells make their own food? | [
"yes",
"no"
] | 1 | This organism is Microcebus rufus. It is a member of the animal kingdom.
Microcebus rufus is commonly called a brown mouse lemur. Humans, chimpanzees, gorillas, monkeys, and lemurs are all primates. A brown mouse lemur is one of the smallest primates in the world! | yes or no | grade4 | natural science | biology | Classification | Describe, classify, and compare kingdoms | In the past, scientists classified living organisms into two groups: plants and animals. Over the past 300 years, scientists have discovered many more types of organisms. Today, many scientists classify organisms into six broad groups, called kingdoms.
Organisms in each kingdom have specific traits. The table below sho... | Microcebus rufus is an animal. Animal cells cannot make their own food. Animals get their food by digesting other organisms. | |
Will these magnets attract or repel each other? | [
"attract",
"repel"
] | 1 | Two magnets are placed as shown.
Hint: Magnets that attract pull together. Magnets that repel push apart. | closed choice | grade2 | natural science | physics | Magnets | Identify magnets that attract or repel | Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart.
Whether a magnet attracts or repels other magnets depends on the positions of its poles, or ends. Every magnet has two poles, called north and south.
Here are some examples of magnets.... | Will these magnets attract or repel? To find out, look at which poles are closest to each other.
The north pole of one magnet is closest to the north pole of the other magnet. Poles that are the same repel. So, these magnets will repel each other. | |
Not supported with pagination yet | Which closing is correct for a letter? | [
"Your friend,\nZane",
"Your Friend,\nZane"
] | 0 | closed choice | grade4 | 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 second closing is correct:
Its first word is capitalized, and it ends with a comma. | |
Which animal's mouth is also adapted for bottom feeding? | [
"armored catfish",
"discus"
] | 0 | Leopard sharks eat organisms such as crabs, shrimp, and fish. They are bottom feeders. Bottom feeders find their food at the bottom of rivers, lakes, and the ocean.
The 's mouth is located on the underside of its head and points downward. Its mouth is adapted for bottom feeding.
Figure: leopard shark. | closed choice | grade5 | 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 an animal's mouth is one example of an adaptation. Animals' mouths can be adapted in different ways. For example, a large mouth with sharp teeth might help an animal tear ... | Look at the picture of the leopard shark.
The leopard shark's mouth is located on the underside of its head and points downward. Its mouth is adapted for bottom feeding. The leopard shark uses its mouth to find food hidden in the sediment of the ocean floor.
Now look at each animal. Figure out which animal has a simila... | |
Which country is highlighted? | [
"Solomon Islands",
"Nauru",
"New Zealand",
"Vanuatu"
] | 3 | closed choice | grade8 | social science | geography | Oceania: geography | Identify and select countries of Oceania | This country is Vanuatu.
Does Vanuatu have any territorial disputes?
Vanuatu claims to own Matthew and Hunter Islands, which are disputed islands. In other words, multiple countries or groups claim that the islands rightfully belong to them.
France has controlled the islands since 1929. But shortly after gaining indepe... | |||
Which continent is highlighted? | [
"North America",
"South America",
"Asia"
] | 0 | closed choice | grade2 | social science | geography | Geography | Identify oceans and continents | A continent is one of the seven largest areas of land on earth. | This continent is North America. | ||
Not supported with pagination yet | What is the volume of a carton of orange juice? | [
"60 gallons",
"60 cups",
"60 fluid ounces"
] | 2 | 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 carton of orange juice is 60 fluid ounces.
60 cups and 60 gallons are both too much. |
Is tillite a mineral? | [
"yes",
"no"
] | 1 | Tillite has the following properties:
no fixed crystal structure
found in nature
not made by living things
not a pure substance
solid | yes or no | grade6 | natural science | earth-science | Rocks and minerals | Identify rocks and minerals | Properties are used to identify different substances. Minerals have the following properties:
It is a solid.
It is formed in nature.
It is not made by organisms.
It is a pure substance.
It has a fixed crystal structure.
If a substance has all five of these properties, then it is a mineral.
Look closely at the last thre... | Tillite does not have all the properties of a mineral. So, tillite is not a mineral. | |
Not supported with pagination yet | What do these two changes have in common?
mixing chocolate syrup into milk
water vapor condensing on a bathroom mirror | [
"Both are caused by heating.",
"Both are only physical changes.",
"Both are caused by cooling.",
"Both are chemical changes."
] | 1 | 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 chocolate syrup into milk is a physical change. The chocolate syrup and milk make a mixture. Making a mixture does not form a different type of matter.
Water vapor condensing on a bathroom mirror is a change of state. So, it is a physical change. The water changes state from gas ... | |
What can Clare and Henry trade to each get what they want? | [
"Henry can trade his broccoli for Clare's oranges.",
"Clare can trade her tomatoes for Henry's broccoli.",
"Henry can trade his almonds for Clare's tomatoes.",
"Clare can trade her tomatoes for Henry's sandwich."
] | 1 | 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.
Clare and Henry open their lunch boxes in the school cafeteria. Both of them could be happier with their lunches. Clare wanted br... | closed choice | grade6 | social science | economics | Basic economic principles | Trade and specialization | Clare wanted broccoli in her lunch and Henry was hoping for tomatoes. Look at the labeled part of the images.
Clare has tomatoes. Henry has broccoli. They can trade tomatoes for broccoli to both be happier. Trading other things would not help either person get more items they want. | ||
Not supported with pagination yet | Which figure of speech is used in this text?
Reality leaves a lot to the imagination.
—attributed to John Lennon | [
"euphemism",
"paradox"
] | 1 | closed choice | grade9 | language science | figurative-language | Literary devices | Classify figures 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 a paradox, a statement that might at first appear to be contradictory, but that may in fact contain some truth.
Reality leaves a lot to the imagination at first appears to be contradictory, as reality and imagination are opposites. However, it contains some truth: what we see as real often employs our abi... | |
Not supported with pagination yet | Which figure of speech is used in this text?
I got hit in the head by a can of soda. Luckily it was a soft drink. | [
"pun",
"onomatopoeia"
] | 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 a pun, a word or phrase that humorously suggests more than one meaning.
Soft drink refers to a carbonated beverage such as a soda. It also suggests that the can is soft and thus doesn't cause too much pain. | |
Not supported with pagination yet | Which is a compound sentence? | [
"The rumor will fade away in time, and you won't even remember it.",
"In June, Colette and Brendan will graduate with honors from Hillsboro High School."
] | 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 second sentence is the compound sentence. It is made up of two independent clauses joined by the coordinating conjunction and.
The rumor will fade away in time, and you won't even remember it. | |
Which property matches this object? | [
"flexible",
"sticky"
] | 0 | Select the better answer. | closed choice | grade3 | natural science | physics | Materials | Identify properties of an object | 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. | Look at the object.
Think about each property.
A flexible object can be folded or bent without breaking easily. The slippers are flexible.
A sticky object can attach or stick to other things. The slippers are not sticky. | |
Which animal is also adapted to be camouflaged in a sandy desert? | [
"lichen katydid",
"thorny devil"
] | 1 | Fennec foxes live in the Sahara Desert of Africa. The is adapted to be camouflaged in a sandy desert.
Figure: fennec fox. | closed choice | grade5 | natural science | biology | Adaptations | Animal adaptations: skins and body coverings | An adaptation is an inherited trait that helps an organism survive or reproduce. Adaptations can include both body parts and behaviors.
The color, texture, and covering of an animal's skin are examples of adaptations. Animals' skins can be adapted in different ways. For example, skin with thick fur might help an animal... | Look at the picture of the fennec fox.
The fennec fox has sand-colored fur covering its skin. It is adapted to be camouflaged in a sandy desert. The word camouflage means to blend in.
Now look at each animal. Figure out which animal has a similar adaptation.
The thorny devil has a yellow-and-brown body. It is adapted t... | |
Think about the magnetic force between the magnets in each pair. Which of the following statements is true? | [
"The magnetic force is stronger in Pair 1.",
"The strength of the magnetic force is the same in both pairs.",
"The magnetic force is stronger in Pair 2."
] | 2 | The images below show two pairs of magnets. The magnets in different pairs do not affect each other. All the magnets shown are made of the same material. | closed choice | 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 2 are closer together than the magnets in Pair 1. So, the magnetic force is stronger in Pair 2 than in Pair 1. | |
Not supported with pagination yet | Complete the sentence.
Water boiling on a stove is a (). | [
"chemical change",
"physical change"
] | 1 | closed choice | grade3 | natural science | chemistry | Physical and chemical change | Identify physical and chemical changes | Chemical changes and physical changes are two common ways matter can change.
In a chemical change, the type of matter changes. The types of matter before and after a chemical change are always different.
Burning a piece of paper is a chemical change. When paper gets hot enough, it reacts with oxygen in the air and burn... | Water boiling on the stove is a change of state. So, it is a physical change. The liquid changes into a gas, but a different type of matter is not formed. | |
Which of these organisms contains matter that was once part of the persimmon tree? | [
"bolete fungus",
"silver maple"
] | 0 | Below is a food web from Shenandoah National Park, a forest ecosystem in Virginia.
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 | grade8 | natural science | biology | Ecological interactions | Interpret food webs II | 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... | Use the arrows to follow how matter moves through this food web. For each answer choice, try to find a path of arrows that starts from the persimmon tree.There are four paths matter can take from the persimmon tree to the parasol fungus: persimmon tree->black bear->parasol fungus. persimmon tree->pine vole->parasol fun... | |
Which rhetorical appeal is primarily used in this ad? | [
"logos (reason)",
"pathos (emotion)",
"ethos (character)"
] | 0 | closed choice | grade12 | language science | writing-strategies | Persuasive strategies | Identify appeals to ethos, pathos, and logos in advertisements | The purpose of an advertisement is to persuade people to do something. To accomplish this purpose, advertisements use three types of persuasive strategies, or appeals.
Appeals to ethos, or character, show the writer or speaker as trustworthy, authoritative, or sharing important values with the audience. An ad that appe... | The ad appeals to logos, or reason, by emphasizing the specific amount of money that customers could save by switching to the advertised brand of car insurance. | ||
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 2.",
"The magnetic force is stronger in Pair 1."
] | 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. | 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. | Distance affects the strength of the magnetic force. But the distance between the magnets in Pair 1 and in Pair 2 is the same.
So, the strength of the magnetic force is the same in both pairs. | |
Not supported with pagination yet | Select the one substance that is not a rock. | [
"Conglomerate is not made by living things. It is not a pure substance.",
"A computer processor is made in a factory. It is a solid.",
"Marble is not made by living things. It is not a pure substance."
] | 1 | 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.
A computer processor is made in a factory. But all rocks are formed in nature.
So, a computer processor is not a rock.
Marble is a rock.
Conglomerate is a rock. | |
Identify the question that Dominic's experiment can best answer. | [
"Do muffins made with white flour have larger volumes than muffins made with whole wheat flour?",
"Does the type of flour used in the muffins affect the number of muffins that turn brown after 30 minutes in the oven?"
] | 0 | The passage below describes an experiment. Read the passage and then follow the instructions below.
Dominic made six batches of muffins over the course of one day. He used whole wheat flour in three of the batches and white flour in the other three batches. He divided the batter into muffin tins, using two ounces of b... | 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... | ||
Which is this organism's scientific name? | [
"water buffalo",
"Bubalus bubalis"
] | 1 | This organism is a water buffalo. It is also called Bubalus bubalis. | closed choice | grade7 | natural science | biology | Classification and scientific names | Identify common and scientific names | An organism's common name is the name that people normally call the organism. Common names often contain words you know.
An organism's scientific name is the name scientists use to identify the organism. Scientific names often contain words that are not used in everyday English.
Scientific names are written in italics,... | Bubalus bubalis is written in italics. The first word is capitalized, and the second word is not.
So, Bubalus bubalis is the scientific name. | |
Which animal's skin is better adapted as a warning sign to ward off predators? | [
"hawk moth",
"strawberry poison frog"
] | 1 | Flamboyant cuttlefish are poisonous animals with brightly colored skin. The bright colors serve as a warning sign that the animal is poisonous. The 's skin is adapted to ward off predators.
Figure: flamboyant cuttlefish. | 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 flamboyant cuttlefish.
The flamboyant cuttlefish has a poisonous body with brightly colored skin. Its skin is adapted to ward off predators. The bright colors serve as a warning sign that the flamboyant cuttlefish is poisonous.
Now look at each animal. Figure out which animal has a similar ad... | |
Not supported with pagination yet | Which letter opening is more formal? | [
"Dear Mr. Dorsey,",
"Dear Ed,"
] | 0 | closed choice | grade9 | language science | writing-strategies | Audience, purpose, and tone | Which text is most formal? | Informal writing is typically used in casual situations or when communicating with someone you know well. Informal language often expresses familiarity and tends to sound more like speech. It uses more conversational language, such as slang, idioms, abbreviations, imprecise language, and contractions.
Formal writing is... | The first letter opening is more formal. It uses the recipient's personal title and last name. The other opening uses the recipient's first name, suggesting a more familiar relationship. | |
Not supported with pagination yet | Would you find the word fifty on a dictionary page with the following guide words?
felt - foster | [
"yes",
"no"
] | 0 | 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 fifty is between the guide words felt - foster, it would be found on that page. | |
Not supported with pagination yet | Which is a compound sentence? | [
"Mr. Chan sent the email yesterday, but no one received it.",
"You can make a quill pen with a goose feather."
] | 0 | closed choice | grade4 | language science | grammar | Sentences, fragments, and run-ons | Is the sentence simple or compound? | A simple sentence is a sentence with only one subject and predicate.
The pitcher threw the ball to first base.
A compound sentence is two simple sentences joined by a comma and a conjunction such as and, but, or, or so.
The pitcher threw the ball, and the batter hit it.
Some simple sentences have a compound subject or ... | The first sentence is the compound sentence. It is made up of two simple sentences joined by a comma and the conjunction but.
Mr. Chan sent the email yesterday, but no one received it. | |
Not supported with pagination yet | Which text uses the word ironic in its traditional sense? | [
"Last winter, Ted took a vacation to Florida to escape Boston's cold, snowy weather. In an ironic twist, he just missed a few of his college friends, who had been in Florida the previous week.",
"Last winter, Ted took a vacation to Florida to escape Boston's cold, snowy weather. In an ironic twist, a rare snowsto... | 1 | closed choice | grade11 | 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 ironic in its traditional sense: contrary to what was intended, often in an amusing way. It's ironic because Ted tried to get away from the snow but found himself in a snowstorm regardless.
Last winter, Ted took a vacation to Florida to escape Boston's cold, snowy weather. In an ironic twist, a rare... | |
Complete the sentence.
is what happens when pollen lands on a female cone. | [
"Pollination",
"Fertilization",
"Photosynthesis"
] | 0 | Male cones make pollen. Wind can blow pollen from a male cone to a female cone. | 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... | When pollen lands on a female cone, it is called pollination. This photograph shows wind blowing pollen from the male cones on a Japanese cedar tree.
Photosynthesis happens when plants use water, carbon dioxide, and energy from sunlight to make sugar. | |
Which animal's skin is better adapted as a warning sign to ward off predators? | [
"blue poison dart frog",
"gray tree frog"
] | 0 | Fire salamanders have poisonous glands in their brightly colored skin. The bright colors serve as a warning sign that the animal is poisonous. The 's skin is adapted to ward off predators.
Figure: fire salamander. | 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 fire salamander.
The fire salamander has a poisonous body with brightly colored skin. Its skin is adapted to ward off predators. The bright colors serve as a warning sign that the fire salamander is poisonous.
Now look at each animal. Figure out which animal has a similar adaptation.
The blue... | |
Not supported with pagination yet | What is the source of the allusion in the sentence below?
Much to our shock, Percy chose to turn the other cheek when Shelby insulted him in a meeting. | [
"the Bible",
"a song"
] | 0 | closed choice | grade8 | 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 turn the other cheek is the Bible.
In the Bible, Jesus counsels his followers to resist retaliation. He says that if they are struck on the right cheek, they shouldn't lash out; instead, they should turn the other cheek toward their attacker.
The allusion turn the other cheek means to respond... | |
What is the capital of Washington? | [
"Olympia",
"Seattle",
"Spokane",
"Juneau"
] | 0 | closed choice | grade4 | social science | geography | State capitals | Identify the 50 state capitals | Olympia is the capital of Washington. | |||
Not supported with pagination yet | Which figure of speech is used in this text?
Bruce's '64 Impala groaned as he turned the ignition. Yet again he resolved to refurbish it over the summer. | [
"personification",
"simile"
] | 0 | 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 personification, giving human characteristics to nonhuman things.
Bruce's '64 Impala groaned describes the car as if it were human. | |
Is breccia a mineral or a rock? | [
"rock",
"mineral"
] | 0 | Breccia has the following properties:
not made by organisms
found in nature
solid
made up of coarse and fine sediment grains
not a pure substance
no fixed crystal structure | 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 breccia match the properties of a rock. So, breccia is a rock. | |
Not supported with pagination yet | Complete the statement.
Graphite is (). | [
"a compound",
"an elementary substance"
] | 1 | Graphite is used to make pencil lead. The chemical formula for graphite is C. | 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 graphite 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 graphite is C. This formula contains one symbol: C for carb... |
Not supported with pagination yet | Which text uses the word ironic in its traditional sense? | [
"Last winter, Pablo took a vacation to Florida to escape Boston's cold, snowy weather. In an ironic twist, a rare snowstorm happened to hit Florida that week.",
"Last winter, Pablo took a vacation to Florida to escape Boston's cold, snowy weather. In an ironic twist, he just missed a few of his college friends, w... | 0 | closed choice | grade9 | language science | writing-strategies | Word usage and nuance | Explore words with new or contested usages | Words change in meaning when speakers begin using them in new ways. For example, the word peruse once only meant to examine in detail, but it's now also commonly used to mean to look through in a casual manner.
When a word changes in meaning, its correct usage is often debated. Although a newer sense of the word may be... | The second text uses ironic in its traditional sense: contrary to what was intended, often in an amusing way. It's ironic because Pablo tried to get away from the snow but found himself in a snowstorm regardless.
Last winter, Pablo took a vacation to Florida to escape Boston's cold, snowy weather. In an ironic twist, a... | |
Not supported with pagination yet | Compare the motion of three ducks. Which duck was moving at the highest speed? | [
"a duck that moved 375kilometers north in 5hours",
"a duck that moved 495kilometers west in 5hours",
"a duck that moved 315kilometers north in 5hours"
] | 1 | 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 kilometer.
Time tells you how long the object has spent moving. One unit used to measure time is the hour.
Think about objects mov... | Look at the distance each duck moved and the time it took to move that distance. The direction each duck moved does not affect its speed.
Notice that each duck moved for 5 hours. The duck that moved 495 kilometers moved the farthest distance in that time. So, that duck must have moved at the highest speed. | |
Is corn syrup a solid, a liquid, or a gas? | [
"a solid",
"a gas",
"a liquid"
] | 2 | closed choice | grade4 | natural science | physics | States of matter | Identify and sort solids, liquids, and gases | 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... | Corn syrup is a liquid. A liquid takes the shape of any container it is in.
If you pour corn syrup into a container, the corn syrup will take the shape of that container. But the corn syrup will still take up the same amount of space. | ||
Not supported with pagination yet | Using only these supplies, which question can Emilia investigate with an experiment? | [
"Do the deer eat fewer leaves from bean plants sprayed with garlic spray than from unsprayed bean plants?",
"Do the deer eat fewer leaves from bean plants sprayed with coffee spray than from unsprayed bean plants?",
"Do the deer eat more leaves from tomato plants or from squash plants?"
] | 0 | Emilia has a garden that is sometimes visited by deer. She notices that the deer eat some plants in her garden more than others. She wonders what factors affect which plants the deer eat. So, she decides to design an experiment. She has the following supplies available:
a garlic spray used to keep garden pests away
fou... | closed choice | grade8 | natural science | science-and-engineering-practices | Designing experiments | Identify questions that can be investigated with a set of materials | Experiments can be designed to answer specific questions. When designing an experiment, you must identify the supplies that are necessary to answer your question. In order to do this, you need to figure out what will be tested and what will be measured during the experiment.
Imagine that you are wondering if plants gro... | |
Will these magnets attract or repel each other? | [
"repel",
"attract"
] | 1 | Two magnets are placed as shown.
Hint: Magnets that attract pull together. Magnets that repel push apart. | closed choice | grade3 | natural science | physics | Magnets | Identify magnets that attract or repel | Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart.
Whether a magnet attracts or repels other magnets depends on the positions of its poles, or ends. Every magnet has two poles, called north and south.
Here are some examples of magnets.... | Will these magnets attract or repel? To find out, look at which poles are closest to each other.
The north pole of one magnet is closest to the south pole of the other magnet. Poles that are different attract. So, these magnets will attract each other. | |
Which of these organisms contains matter that was once part of the lichen? | [
"grizzly bear",
"snowy owl",
"bilberry",
"brown lemming"
] | 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 | grade7 | natural science | biology | Ecological interactions | Interpret food webs II | 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... | Use the arrows to follow how matter moves through this food web. For each answer choice, try to find a path of arrows that starts from the lichen.
The only arrow pointing to the snowy owl starts from the short-tailed weasel. The only arrow pointing to the short-tailed weasel starts from the brown lemming. The brown lem... | |
What is the name of the colony shown? | [
"Kentucky",
"New Hampshire",
"Pennsylvania",
"Maryland"
] | 1 | closed choice | grade5 | social science | us-history | English colonies in North America | Identify the Thirteen Colonies | The colony is New Hampshire.
During the colonial era, New Hampshire and New York both claimed the territory that would later become the state of Vermont. Vermont was never its own colony. | |||
Which country is highlighted? | [
"the Federated States of Micronesia",
"Kiribati",
"Papua New Guinea",
"New Zealand"
] | 2 | closed choice | grade7 | social science | geography | Oceania: geography | Identify and select countries of Oceania | This country is Papua New Guinea.
Why does Papua New Guinea share its island with another country?
Papua New Guinea takes up the eastern half of the island of New Guinea. The western half is part of Indonesia, an Asian country.
Beginning in the 17 th century, several countries took control of different parts of the isl... | |||
Not supported with pagination yet | Is a rubber band a good or a service? | [
"a good",
"a service"
] | 0 | closed choice | grade2 | social science | economics | Economics | 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 a rubber band is a good or a service, ask these questions:
Is a rubber band something you can touch? Yes.
Is a rubber band a job you might pay someone else to do? No.
So, a rubber band is a good. | |
Not supported with pagination yet | Which is a compound sentence? | [
"He showed the officers a hotel receipt and an airplane ticket as proof of his time in Buenos Aires.",
"Lucy accidentally spilled her glass of juice, but luckily it didn't get on the white sofa."
] | 1 | closed choice | grade5 | language science | grammar | Sentences, fragments, and run-ons | Is the sentence simple, compound, or complex? | A clause is a group of words that contains both a subject and a predicate.
An independent clause is a complete thought. It can stand alone as a sentence. A dependent clause is not a complete thought. It cannot stand alone as a sentence.
the oranges on our tree are ripe
The clause can stand alone. It is independent.
aft... | The first sentence is the compound sentence. It is made up of two independent clauses joined by the coordinating conjunction but.
Lucy accidentally spilled her glass of juice, but luckily it didn't get on the white sofa. | |
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 | 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 | Select the one substance that is not a mineral. | [
"Hematite is a pure substance. It is a solid.",
"Pyrite is a solid. It is not made by living things.",
"Burlap is not a pure substance. It is made by humans."
] | 2 | 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.
Pyrite is a mineral.
Burlap is not a pure substance. But all minerals are pure substances.
Burlap is made by humans. But minerals are not made by living things.
So, burlap is not... | |
Which property do these two objects have in common? | [
"breakable",
"rough"
] | 1 | Select the better answer. | closed choice | grade2 | natural science | physics | Materials | Compare properties of objects | An object has different properties. A property of an object can tell you how it looks, feels, tastes, or smells.
Different objects can have the same properties. You can use these properties to put objects into groups. | Look at each object.
For each object, decide if it has that property.
A breakable object will break into pieces if you drop it. Neither of the objects are breakable.
A rough object feels scratchy when you touch it. Both objects are rough.
The property that both objects have in common is rough. | |
What is the name of the colony shown? | [
"Virginia",
"West Virginia",
"North Carolina",
"South Carolina"
] | 0 | closed choice | grade5 | social science | us-history | English colonies in North 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. | |||
Is halite a mineral? | [
"yes",
"no"
] | 0 | Halite has the following properties:
fixed crystal structure
solid
found in nature
made of a pure substance called sodium chloride
not made by organisms | yes or no | grade6 | natural science | earth-science | Rocks and minerals | Identify rocks and minerals | Properties are used to identify different substances. Minerals have the following properties:
It is a solid.
It is formed in nature.
It is not made by organisms.
It is a pure substance.
It has a fixed crystal structure.
If a substance has all five of these properties, then it is a mineral.
Look closely at the last thre... | Halite has all the properties of a mineral. So, halite is a mineral. | |
Is the following statement about our solar system true or false?
Of the four smallest planets, two are made mainly of gas. | [
"true",
"false"
] | 1 | Use the data to answer the question below. | true-or false | grade8 | natural science | earth-science | Astronomy | Analyze data to compare properties of planets | A planet's volume tells you the size of the planet.
The primary composition of a planet is what the planet is made mainly of. In our solar system, planets are made mainly of rock, gas, or ice.
The volume of a planet is a very large quantity. Large quantities such as this are often written in scientific notation.
For ex... | To decide which four planets are the smallest, look at the volumes and compare the exponents. The volumes of Mercury, Venus, Earth, and Mars have the smallest exponents. So, these four planets are the smallest.
These four planets are made mainly of rock. So, of the four smallest planets, none are made mainly of gas. | |
Not supported with pagination yet | Which is a sentence fragment? | [
"Swims happily in the beautiful coral reef.",
"The car needed gas, Dad went to the gas station."
] | 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... | Swims happily in the beautiful coral reef is a sentence fragment. It is missing a subject. | |
Which of these continents does the prime meridian intersect? | [
"North America",
"Antarctica",
"Australia"
] | 1 | closed choice | grade5 | social science | geography | Maps | Use lines of latitude and longitude | Lines of latitude and lines of longitude are imaginary lines drawn on some globes and maps. They can help you find places on globes and maps.
Lines of latitude show how far north or south a place is. We use units called degrees to describe how far a place is from the equator. The equator is the line located at 0° latit... | The prime meridian is the line at 0° longitude. It intersects Antarctica. It does not intersect North America or Australia. | ||
Which material is this figurine made of? | [
"clay",
"concrete"
] | 0 | closed choice | grade3 | 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 figurine.
The figurine is made of clay.
Clay is a soft, flexible material. When clay dries out, it can become very hard. | ||
Not supported with pagination yet | Is this a sentence fragment?
Derailed by miscommunication and a lack of funding, Evan and Jon's new business venture. | [
"yes",
"no"
] | 0 | yes or no | grade12 | language science | writing-strategies | Sentences, fragments, and run-ons | Identify sentence fragments | A sentence is a group of words that expresses a complete thought.
The band I'm in has been rehearsing daily because we have a concert in two weeks.
A sentence fragment is a group of words that does not express a complete thought.
Rehearsing daily because we have a concert in two weeks.
This fragment is missing a subjec... | This is a sentence fragment. It does not express a complete thought.
Derailed by miscommunication and a lack of funding, Evan and Jon's new business venture.
Here is one way to fix the sentence fragment:
Evan and Jon's new business venture has been derailed by miscommunication and a lack of funding. | |
What is the capital of Nevada? | [
"Salem",
"Carson City",
"Reno",
"Las Vegas"
] | 1 | closed choice | grade4 | social science | geography | State capitals | Identify the 50 state capitals | Carson City is the capital of Nevada. | |||
Not supported with pagination yet | Which is a compound sentence? | [
"Tracy knew the answer to the question, so she raised her hand.",
"The beavers gnaw on logs by the riverbank."
] | 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 first sentence is the compound sentence. It is made up of two simple sentences joined by a comma and the conjunction so.
Tracy knew the answer to the question, so she raised her hand. | |
Not supported with pagination yet | Which tense does the sentence use?
Mr. Coleman signed his name on the letter. | [
"present tense",
"future tense",
"past tense"
] | 2 | closed choice | grade2 | 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, signed. The verb ends in -ed and tells you about something that has already happened. | |
Select the organism in the same genus as the mouflon. | [
"Ovis dalli",
"Alouatta palliata",
"Castor canadensis"
] | 0 | This organism is a mouflon. Its scientific name is Ovis orientalis. | closed choice | grade4 | 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 mouflon's scientific name is Ovis orientalis. The first word of its scientific name is Ovis.
Ovis dalli is in the genus Ovis. The first word of its scientific name is Ovis. So, Ovis dalli and Ovis orientalis are in the same genus.
Castor canadensis is in the genus Castor. The first word of its scientific name is Cast... | |
Not supported with pagination yet | Which type of sentence is this?
Leroy always approaches difficult tasks enthusiastically, and he frequently motivates others with his energy and fervor. | [
"compound",
"compound-complex",
"complex",
"simple"
] | 0 | closed choice | grade12 | language science | grammar | Phrases and clauses | Is the sentence simple, compound, complex, or compound-complex? | A clause is a group of words that contains both a subject and a predicate.
An independent clause is a complete thought that can stand alone as a sentence. A dependent clause (or subordinate clause) is not a complete thought and cannot stand alone as a sentence.
the oranges on our tree are ripe
The clause can stand alon... | The sentence is compound. It is made up of two independent clauses joined by the coordinating conjunction and.
Leroy always approaches difficult tasks enthusiastically, and he frequently motivates others with his energy and fervor. | |
Not supported with pagination yet | What information supports the conclusion that Brittany acquired this trait? | [
"Brittany learned to identify insects by reading many books about insects.",
"Brittany likes to look at butterflies and beetles."
] | 0 | Read the description of a trait.
Brittany is good at identifying insects. | 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... | |
What is the capital of Georgia? | [
"Fayetteville",
"Savannah",
"Athens",
"Atlanta"
] | 3 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the Southeast | Atlanta is the capital of Georgia. | |||
Not supported with pagination yet | Is a skateboard a good or a service? | [
"a service",
"a good"
] | 1 | closed choice | grade2 | social science | economics | Economics | 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 a skateboard is a good or a service, ask these questions:
Is a skateboard something you can touch? Yes.
Is a skateboard a job you might pay someone else to do? No.
So, a skateboard is a good. | |
Not supported with pagination yet | Which text uses the word random in its traditional sense? | [
"Judy made a random trip to the grocery store, though her kitchen was already stocked with a hodgepodge of food.",
"At the grocery store, Judy hastily grabbed fruits and vegetables at random, filling her shopping cart with a hodgepodge of food."
] | 1 | closed choice | grade11 | language science | writing-strategies | Word usage and nuance | Explore words with new or contested usages | Words change in meaning when speakers begin using them in new ways. For example, the word peruse once only meant to examine in detail, but it's now also commonly used to mean to look through in a casual manner.
When a word changes in meaning, its correct usage is often debated. Although a newer sense of the word may be... | The second text uses random in its traditional sense: made or occurring without a definite pattern.
At the grocery store, Judy hastily grabbed fruits and vegetables at random, filling her shopping cart with a hodgepodge of food.
The first text uses random in its nontraditional sense: odd or out of place.
Judy made a ra... | |
Not supported with pagination yet | Which is a run-on sentence? | [
"The little boy popped a big bubble.",
"The cardboard box gets wet it falls apart."
] | 1 | closed choice | grade3 | language science | writing-strategies | Sentences, fragments, and run-ons | Is it a complete sentence 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 run-on sentence is made up of two sentences that are joined without end punctuation or with just a comma.
I knocked on the door it opened.
It started raining, we ran inside.
To fix a run-on ... | The cardboard box gets wet it falls apart is a run-on sentence. It has two sentences that are joined without end punctuation: The cardboard box gets wet and It falls apart. | |
Which of these states is farthest north? | [
"Nebraska",
"South Carolina",
"Oklahoma",
"West Virginia"
] | 0 | closed choice | grade3 | social science | geography | Geography | Read a map: cardinal directions | Maps have four cardinal directions, or main directions. Those directions are north, south, east, and west.
A compass rose is a set of arrows that point to the cardinal directions. A compass rose usually shows only the first letter of each cardinal direction.
The north arrow points to the North Pole. On most maps, north... | To find the answer, look at the compass rose. Look at which way the north arrow is pointing. Nebraska is farthest north. | ||
Not supported with pagination yet | Assume all other forces on Candice are balanced. Which statement describes the forces on Candice? | [
"The forces are balanced, so there is no net force on Candice.",
"The forces are unbalanced, so there is a net force on Candice."
] | 1 | Candice is sitting on a roller coaster cart as it reaches the bottom of a big loop. Earth's gravity is pulling down on Candice with a force of 600N. The seat of the cart is pushing up on Candice with a force of 1,200N. | closed choice | grade6 | natural science | physics | Velocity, acceleration, and forces | Balanced and unbalanced forces | A force is a push or a pull that acts on an object. Every force has a direction and a magnitude, or strength. If two forces act on an object in opposite directions, the forces are called opposing forces.
When opposing forces have the same magnitude, they are balanced. If all the forces on an object are balanced, there ... | To determine if there is a net force on Candice, look at the forces:
Earth's gravity is pulling Candice down with a force of 600 N.
The seat of the cart is pushing Candice up with a force of 1,200 N.
The forces are in opposite directions, and the forces have different magnitudes: 600 N and 1,200 N. This means that the ... |
Not supported with pagination yet | Which sentence is more formal? | [
"A tropical cyclone is a strong circular storm that begins over warm oceans near the equator.",
"A tropical cyclone is a real big storm that begins over warm oceans near the equator."
] | 0 | closed choice | grade5 | language science | writing-strategies | Author's purpose and tone | Which sentence is more formal? | Formal writing is used for essays, business letters, and reports. The following types of informal language should be avoided in formal writing:
Type | Examples
slang | cool, awesome
idioms | knock your socks off
conversational language | gonna, kinda, yeah
abbreviated language | ASAP, FYI
overly simple or imprecise lan... | The second sentence is less formal. You can tell because it uses conversational language (real big).
The first sentence uses formal language in place of the conversational language, so it is more formal overall. | |
Not supported with pagination yet | Would you find the word herd on a dictionary page with the following guide words?
however - hue | [
"yes",
"no"
] | 1 | yes or no | grade8 | language science | reference-skills | Reference skills | Use guide words | Guide words appear on each page of a dictionary. They tell you the first word and last word on the page. The other words on the page come between the guide words in alphabetical order.
To put words in alphabetical order, put them in order by their first letters. If the first letters are the same, look at the second let... | Put the words in alphabetical order.
Since herd is not between the guide words however - hue, it would not be found on that page. | |
Which continent is highlighted? | [
"South America",
"Europe",
"Australia"
] | 2 | closed choice | grade2 | social science | geography | Geography | Identify oceans and continents | A continent is one of the seven largest areas of land on earth. | This continent is Australia. | ||
Which material is this canoe made of? | [
"clay",
"wood"
] | 1 | closed choice | grade3 | 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 canoe.
The canoe is made of wood. |
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.