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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Think about the magnetic force between the magnets in each pair. Which of the following statements is true? | [
"The magnitude of the magnetic force is the same in both pairs.",
"The magnitude of the magnetic force is greater in Pair 1.",
"The magnitude of the magnetic force is greater in Pair 2."
] | 1 | The images below show two pairs of magnets. The magnets in different pairs do not affect each other. All the magnets shown are made of the same material, but some of them are different sizes and shapes. | closed choice | grade8 | natural science | physics | Velocity, acceleration, and forces | Compare magnitudes of magnetic forces | Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart. These pulls and pushes between magnets are called magnetic forces.
The strength of a force is called its magnitude. The greater the magnitude of the magnetic force between two magnets,... | The magnets in Pair 1 attract. The magnets in Pair 2 repel. But whether the magnets attract or repel affects only the direction of the magnetic force. It does not affect the magnitude of the magnetic force.
Magnet sizes affect the magnitude of the magnetic force. Imagine magnets that are the same shape and made of the ... | |
Select the organism in the same species as the Burmese python. | [
"Python bivittatus",
"Melanoplus bivittatus",
"Falco peregrinus"
] | 0 | This organism is a Burmese python. Its scientific name is Python bivittatus. | closed choice | grade7 | 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 Burmese python's scientific name is Python bivittatus.
Melanoplus bivittatus does have the same species within its genus as a Burmese python, but they are not in the same genus! They do not have the same scientific name as each other. So, these organisms are not in the same species.
Python bivittatus has the same sci... | |
Not supported with pagination yet | What information supports the conclusion that Sebastian inherited this trait? | [
"Sebastian's mother cuts his hair every month.",
"Sebastian's parents have blond hair. They passed down this trait to Sebastian."
] | 1 | Read the description of a trait.
Sebastian has blond hair. | closed choice | grade5 | natural science | biology | Traits and heredity | Inherited and acquired traits: use evidence to support a statement | Organisms, including people, have both inherited and acquired traits. Inherited and acquired traits are gained in different ways.
Inherited traits are passed down through families. Children gain these traits from their parents. Inherited traits do not need to be learned.
Acquired traits are gained during a person's lif... | |
Not supported with pagination yet | Which word would you find on a dictionary page with the following guide words?
tin - truth | [
"toast",
"tent"
] | 0 | closed choice | 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 toast is between the guide words tin - truth, it would be found on that page. | |
Not supported with pagination yet | Which text uses the word nauseous in its traditional sense? | [
"Everyone seemed to enjoy the magnolia-scented candle, but Rafi found the smell rather nauseous.",
"Everyone seemed to enjoy the magnolia-scented candle, but it made Rafi feel rather nauseous."
] | 0 | 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 nauseous in its traditional sense: causing disgust or nausea.
Everyone seemed to enjoy the magnolia-scented candle, but Rafi found the smell rather nauseous.
The first text uses nauseous in its nontraditional sense: feeling disgusted or nauseated.
Everyone seemed to enjoy the magnolia-scented candl... | |
Which of these organisms contains matter that was once part of the persimmon tree? | [
"swallowtail caterpillar",
"beaver"
] | 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 two paths matter can take from the persimmon tree to the pine vole: persimmon tree->pine vole. persimmon tree->swallowtail caterpillar->pine vole. There are... | |
Which of these states is farthest south? | [
"Wyoming",
"Illinois",
"Mississippi",
"Nevada"
] | 2 | 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 south arrow is pointing. Mississippi is farthest south. | ||
Not supported with pagination yet | Select the temperate deciduous forest ecosystem. | [
"This ecosystem has:\nlong, cold winters and short, cool summers\nmany evergreen trees\nsoil that is poor in nutrients",
"This ecosystem has:\nyear-round rain and warm temperatures\nsoil that is poor in nutrients\nmany different types of organisms",
"This ecosystem has:\nwarm, wet summers and cold, wet winters\... | 2 | closed choice | grade7 | natural science | biology | Ecosystems | Identify 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 temperate deciduous forest is a type of ecosystem. It has warm, wet summers and cold, wet winters, soil that is rich in nutrients, and only a few types of trees.
Choice 1 is a temperate deciduous forest ecosystem. It has warm, wet summers and cold, wet winters.
Choice 2 is a taiga ecosystem. It has many evergreen tre... | |
Which i in column 3? | [
"the grocery store",
"the pond",
"the police department",
"the fire department"
] | 2 | closed choice | grade3 | social science | geography | Geography | Use a letter-number grid | A grid is made up of lines of squares. They are organized in rows and columns. A grid can help you use a map.
A row is a line of squares that goes from side to side. Rows are marked with letters.
A column is a line of squares that goes up and down. Columns are marked with numbers. | The police department is in column 3. | ||
Not supported with pagination yet | How long is a tennis racket? | [
"24 feet",
"24 inches",
"24 yards"
] | 1 | Select the best estimate. | closed choice | grade4 | natural science | units-and-measurement | Units and measurement | Choose customary units of distance | Measurements are written with both a number and a unit. The unit comes after the number. The unit shows what the number means.
When you are using customary units, length may be written with units of inches, feet, yards, or miles.
There are 12 inches in 1 foot, and 3 feet in 1 yard. There are 5,280 feet in 1 mile.
A foo... | The best estimate for the length of a tennis racket is 24 inches.
24 feet and 24 yards are both too long. |
Which animal is also adapted to be camouflaged in a sandy desert? | [
"camel",
"collared tree runner"
] | 0 | Horned vipers live in the deserts of Africa and the Middle East. The is adapted to be camouflaged in a sandy desert.
Figure: horned viper. | 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 horned viper.
The horned viper has sand-colored scales covering its 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 camel has sand-colored fur covering its skin. It i... | |
Not supported with pagination yet | Based on this information, what is Winnee's phenotype for the wool color trait? | [
"white wool",
"black wool"
] | 1 | In a group of sheep, some individuals have white wool and others have black wool. In this group, the gene for the wool color trait has two alleles. The allele for black wool (l) is recessive to the allele for white wool (L).
Winnee is a sheep from this group. Winnee has the homozygous genotype ll for the wool color gen... | closed choice | grade7 | natural science | biology | Genes to traits | Genetics vocabulary: dominant and recessive | All organisms have pieces of hereditary material called genes, which are passed from parents to offspring. Genes contain instructions for building the parts of an organism. An organism's genes affect its observable traits, including its appearance, its behavior, and which diseases it may have. Genes may have different ... | Winnee's genotype for the wool color gene is ll. Winnee's genotype of ll has only l alleles. The l allele is for black wool. So, Winnee's phenotype for the wool color trait must be black wool.
To check this answer, consider whether Winnee's alleles are dominant or recessive. The allele for black wool (l) is recessive t... |
Not supported with pagination yet | Which object has the least thermal energy? | [
"a blueberry muffin at a temperature of 39°C",
"a blueberry muffin at a temperature of 23°C",
"a blueberry muffin at a temperature of 38°C"
] | 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 blueberry muffins have the same mass but different temperatures. Since the 23°C muffin is the coldest, it has the least thermal energy. |
Compare the average kinetic energies of the particles in each sample. Which sample has the higher temperature? | [
"sample A",
"sample B",
"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 | grade6 | natural science | physics | Particle motion and energy | Identify how particle motion affects temperature and pressure | The temperature of a substance depends on the average kinetic energy of the particles in the substance. The higher the average kinetic energy of the particles, the higher the temperature of the substance.
The kinetic energy of a particle is determined by its mass and speed. For a pure substance, the greater the mass of... | Each particle in the two samples has the same mass, but the particles in sample B have a higher average speed than the particles in sample A. So, the particles in sample B have a higher average kinetic energy than the particles in sample A.
Because the particles in sample B have the higher average kinetic energy, sampl... | |
Not supported with pagination yet | Which graduation announcement is more formal? | [
"Fred Levin is graduating, and we couldn't be more proud!",
"We are proud to announce the graduation of Fred Levin."
] | 1 | closed choice | grade12 | language science | writing-strategies | Audience, purpose, and tone | Which text is most formal? | Informal writing is typically used in casual situations or when communicating with someone you know well. Informal language often expresses familiarity and tends to sound more like speech. It uses more conversational language, such as slang, idioms, abbreviations, imprecise language, and contractions.
Formal writing is... | The second graduation announcement is more formal. It uses more ceremonious language (proud to announce). The other graduation announcement uses more conversational language (we couldn't be more proud!). | |
Not supported with pagination yet | Using only these supplies, which question can Naomi investigate with an experiment? | [
"Does the basketball bounce higher on gravel or on grass?",
"Do larger basketballs bounce higher than smaller basketballs on a brick patio?",
"Does the basketball bounce higher on a lawn or on a dirt path?"
] | 0 | Naomi gets a basketball for her birthday and dribbles it around her neighborhood. She notices that sometimes the ball bounces higher than other times. She wonders what factors affect how high her ball bounces. So, she decides to design an experiment. She has the following supplies available:
one basketball
access to a ... | closed choice | grade6 | 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. | 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. | |
What is the capital of Arkansas? | [
"Little Rock",
"Jefferson City",
"Fayetteville",
"Dover"
] | 0 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the Southeast | Little Rock is the capital of Arkansas. | |||
Select the chemical formula for this molecule. | [
"P3C",
"HPCl3",
"PCl2",
"PCl3"
] | 3 | closed choice | grade5 | natural science | chemistry | Atoms and molecules | Match chemical formulas to ball-and-stick models | Every substance around you is made up of atoms. Atoms can link together to form molecules. The links between atoms in a molecule are called chemical bonds. Different molecules are made up of different chemical elements, or types of atoms, bonded together.
Scientists use both ball-and-stick models and chemical formulas ... | P is the symbol for phosphorus. Cl is the symbol for chlorine. This ball-and-stick model shows a molecule with one phosphorus atom and three chlorine atoms.
The chemical formula will contain the symbols P and Cl. There is one phosphorus atom, so P will not have a subscript. There are three chlorine atoms, so Cl will ha... | ||
What is the name of the colony shown? | [
"New Hampshire",
"New York",
"South Carolina",
"New Jersey"
] | 2 | closed choice | grade8 | social science | us-history | Colonial America | Identify the Thirteen Colonies | The colony is South Carolina. | |||
Not supported with pagination yet | What does the euphemism in this text suggest?
The Carlson family donated a number of gently loved books and toys to a local shelter. | [
"The items were precious.",
"The items were not new."
] | 1 | closed choice | grade10 | language science | figurative-language | Literary devices | Interpret figures of speech | Figures of speech are words or phrases that use language in a nonliteral or unusual way. They can make writing more expressive.
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. | The text uses a euphemism, a polite or indirect expression that is used to de-emphasize an unpleasant topic.
The euphemism gently loved means the items were not new. Gently loved is a nicer way of referring to used items. | |
Not supported with pagination yet | What do these two changes have in common?
mixing chocolate syrup into milk
butter melting on a hot day | [
"Both are chemical changes.",
"Both are only physical changes.",
"Both are caused by heating.",
"Both are caused by cooling."
] | 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.
Butter melting on a hot day is a change of state. So, it is a physical change. The butter changes from solid to liquid, but it i... | |
Not supported with pagination yet | Which is a compound sentence? | [
"I don't believe in superstitions, but my mother takes them quite seriously.",
"He showed the officers a hotel receipt and an airplane ticket as proof of his time in Buenos Aires."
] | 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 but.
I don't believe in superstitions, but my mother takes them quite seriously. | |
Not supported with pagination yet | Which logical fallacy is used in the text?
Xavier's definitely voting for the Conservative Party in the next election because he said there was no way he was voting for the Labour Party. | [
"slippery slope fallacy: the false assumption that a small first step will lead to extreme consequences",
"false dichotomy: an argument that presents only two choices when more options exist",
"false causation: the assumption that because two things happened together, one caused the other"
] | 1 | closed choice | grade11 | language science | writing-strategies | Developing and supporting arguments | Classify logical fallacies | A strong argument uses valid reasoning and logic in support of a claim. When an argument or claim introduces irrelevant information or misrepresents the issues at hand, it may be committing a logical fallacy. Logical fallacies can hurt a writer's credibility and can lead readers to draw false conclusions.
A logical fal... | The text argues that Xavier is voting either for the candidate from the Conservative Party or the Labour Party. However, Xavier might be voting for a third party—or he might not be voting at all. This illustrates a type of logical fallacy known as a false dichotomy. | |
Which of the following could Cara's test show? | [
"whether producing more insulin would help the bacteria grow faster",
"whether she added enough nutrients to help the bacteria produce 20% more insulin",
"whether different types of bacteria would need different nutrients to produce insulin"
] | 1 | People can use the engineering-design process to develop solutions to problems. One step in the process is testing if a potential solution meets the requirements of the design.
The passage below describes how the engineering-design process was used to test a solution to a problem. Read the passage. Then answer the ques... | closed choice | grade7 | natural science | science-and-engineering-practices | Engineering practices | Evaluate tests of engineering-design solutions | People can use the engineering-design process to develop solutions to problems. One step in the process is testing if a potential solution meets the requirements of the design. How can you determine what a test can show? You need to figure out what was tested and what was measured.
Imagine an engineer needs to design a... | ||
Not supported with pagination yet | What do these two changes have in common?
breaking a piece of glass
dew appearing on grass in the morning | [
"Both are only physical changes.",
"Both are chemical changes.",
"Both are caused by heating.",
"Both are caused by cooling."
] | 0 | 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.
Breaking a piece of glass is a physical change. The glass gets broken into pieces. But each piece is still made of the same type of matter.
Dew appearing on grass in the morning is a change of state. So, it is a physical change. Water vapor in the air touches the cool grass and becomes ... | |
Not supported with pagination yet | Which change best matches the sentence?
Flowing water carries away sand and mud. | [
"wildfire",
"erosion",
"volcanic eruption"
] | 1 | closed choice | grade3 | natural science | earth-science | Earth events | Classify changes to Earth's surface I | |||
Not supported with pagination yet | What does the metaphor in this text suggest?
When Trevor lost his job, he was devastated. The only light in the sea of darkness was the prospect of pursuing a new career. | [
"Trevor felt in the dark about what to do after losing his job.",
"There was a benefit to Trevor's job loss."
] | 1 | closed choice | grade9 | language science | figurative-language | Literary devices | Interpret figures of speech | Figures of speech are words or phrases that use language in a nonliteral or unusual way. They can make writing more expressive.
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 Trevor's job loss. A light would be beneficial in helping someone escape a dark, difficul... | |
Not supported with pagination yet | Which sentence is more formal? | [
"Most of the apartments in New York City's Upper West Side are extremely expensive.",
"Most of the apartments in New York City's Upper West Side cost an arm and a leg."
] | 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 first sentence is less formal. You can tell because it uses an idiom (cost an arm and a leg).
The second sentence uses formal language in place of the idiom, so it is more formal overall. | |
Not supported with pagination yet | What information supports the conclusion that Wyatt acquired this trait? | [
"Wyatt was not born knowing how to identify different fish. He had to learn this skill.",
"Wyatt has two pet fish. The fish live in a fish tank together."
] | 0 | Read the description of a trait.
Wyatt is good at identifying fish. | closed choice | grade3 | natural science | biology | Heredity | Inherited and acquired traits: use evidence to support a statement | Organisms, including people, have both inherited and acquired traits. Inherited and acquired traits are gained in different ways.
Inherited traits are passed down through families. Children gain these traits from their parents. Inherited traits do not need to be learned.
Acquired traits are gained during a person's lif... | |
Not supported with pagination yet | Which excerpt from a lab report is more formal? | [
"This experiment focused on the energy requirements of the human body.",
"This is an experiment where we looked at how the body needs lots of energy."
] | 0 | closed choice | grade11 | language science | writing-strategies | Audience, purpose, and tone | Which text is most formal? | Informal writing is typically used in casual situations or when communicating with someone you know well. Informal language often expresses familiarity and tends to sound more like speech. It uses more conversational language, such as slang, idioms, abbreviations, imprecise language, and contractions.
Formal writing is... | The first excerpt from a lab report is more formal. It uses more elevated language (focused on, energy requirements, human body). The other excerpt uses more imprecise language (lots) and sounds more casual (we looked at how). | |
Think about the magnetic force between the magnets in each pair. Which of the following statements is true? | [
"The magnitude of the magnetic force is greater in Pair 2.",
"The magnitude of the magnetic force is the same in both pairs.",
"The magnitude of the magnetic force is greater in Pair 1."
] | 2 | The images below show two pairs of magnets. The magnets in different pairs do not affect each other. All the magnets shown are made of the same material, but some of them are different sizes and shapes. | closed choice | grade6 | natural science | physics | Velocity, acceleration, and forces | Compare magnitudes of magnetic forces | Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart. These pulls and pushes between magnets are called magnetic forces.
The strength of a force is called its magnitude. The greater the magnitude of the magnetic force between two magnets,... | The magnets in Pair 1 attract. The magnets in Pair 2 repel. But whether the magnets attract or repel affects only the direction of the magnetic force. It does not affect the magnitude of the magnetic force.
Magnet sizes affect the magnitude of the magnetic force. Imagine magnets that are the same shape and made of the ... | |
Not supported with pagination yet | Which of the following contains a vague pronoun reference? | [
"For many sitcoms, sound engineers use a laugh track to simulate the laughter of a live studio audience.",
"For many sitcoms, they use a laugh track to simulate the laughter of a live studio audience."
] | 1 | closed choice | grade10 | language science | writing-strategies | Pronouns | Identify vague pronoun references | When writing, make sure to avoid vague pronoun references. A vague pronoun reference occurs when a pronoun could refer to more than one possible antecedent.
When Lisa and Kim finally landed, she breathed a sigh of relief.
The pronoun she could refer to either Lisa or Kim, so the meaning of the sentence is unclear.
Vagu... | The first answer choice contains a vague pronoun reference. The pronoun they is used without its antecedent.
The second answer choice shows a possible correction for the vague pronoun reference. They has been replaced with sound engineers.
For many sitcoms, sound engineers use a laugh track to simulate the laughter of ... | |
Not supported with pagination yet | Complete the statement.
Sulfur dioxide is (). | [
"an elementary substance",
"a compound"
] | 1 | Sulfur dioxide is a poisonous gas that is released into the atmosphere when volcanoes erupt. The chemical formula for sulfur dioxide is SO2. | 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 sulfur dioxide 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 sulfur dioxide is SO2. This formula contains two symb... |
Not supported with pagination yet | Based on this information, what is this pea plant's phenotype for the pea color trait? | [
"Ee",
"yellow peas"
] | 1 | In a group of pea plants, some individuals have yellow peas and others have green peas. In this group, the gene for the pea color trait has two alleles. The allele E is for yellow peas, and the allele e is for green peas.
A certain pea plant from this group has yellow peas. This plant has one allele for yellow peas and... | closed choice | grade8 | natural science | biology | Genes to traits | Genetics vocabulary: genotype and phenotype | All organisms have pieces of hereditary material called genes, which are passed from parents to offspring. Genes contain instructions for building the parts of an organism. An organism's genes affect its observable traits, including its appearance, its behavior, and which diseases it may have. Genes may have different ... | An organism's phenotype for a trait is its observable version of that trait. The pea plant's observable version of the pea color trait is yellow peas. So, the plant's phenotype for the pea color trait is yellow peas. |
Will these magnets attract or repel each other? | [
"repel",
"attract"
] | 0 | Two magnets are placed as shown.
Hint: Magnets that attract pull together. Magnets that repel push apart. | closed choice | grade2 | natural science | physics | Magnets | Identify magnets that attract or repel | Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart.
Whether a magnet attracts or repels other magnets depends on the positions of its poles, or ends. Every magnet has two poles, called north and south.
Here are some examples of magnets.... | Will these magnets attract or repel? To find out, look at which poles are closest to each other.
The 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 word would you find on a dictionary page with the following guide words?
ceiling - conquer | [
"crust",
"chop"
] | 1 | 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 chop is between the guide words ceiling - conquer, it would be found on that page. | |
Complete the sentence.
Silfra formed at a () boundary. | [
"divergent",
"transform",
"convergent"
] | 0 | Read the passage and look at the picture.
Silfra is a rift valley that runs along part of the Mid-Atlantic Ridge in Iceland. This picture of Silfra shows an area where large cracks formed as the North American Plate and the Eurasian Plate moved away from each other. In this area, the rift cuts through an underwater spr... | closed choice | grade8 | natural science | earth-science | Plate tectonics | Describe tectonic plate boundaries around the world | The outer layer of Earth is broken up into many pieces called tectonic plates, or simply plates. The breaks between plates are called plate boundaries. Plate boundaries are classified by the way the plates are moving relative to each other:
At a transform boundary, two plates are sliding past each other.
At a convergen... | To figure out what type of plate boundary formed Silfra, you need to know how the tectonic plates interacted. To find this out, read the passage carefully.
Silfra is a rift valley that runs along part of the Mid-Atlantic Ridge in Iceland. This picture of Silfra shows an area where large cracks formed as the North Ameri... | |
Not supported with pagination yet | Is a pair of shoes 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 pair of shoes is a good or a service, ask these questions:
Is a pair of shoes something you can touch? Yes.
Is a pair of shoes a job you might pay someone else to do? No.
So, a pair of shoes is a good. | |
What is the capital of Rhode Island? | [
"Annapolis",
"Newport",
"Providence",
"Dover"
] | 2 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the Northeast | Providence is the capital of Rhode Island. | |||
Will these magnets attract or repel each other? | [
"attract",
"repel"
] | 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 north pole of one magnet is closest to the north pole of the other magnet. Like poles repel. So, these magnets will repel each other. | |
Which better describes the Catoctin Mountain Park ecosystem? | [
"It has soil that is poor in nutrients. It also has only a few types of trees.",
"It has soil that is rich in nutrients. It also has only a few types of trees."
] | 1 | Figure: Catoctin Mountain Park.
Catoctin Mountain Park is a temperate deciduous forest ecosystem in Maryland. | 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 temperate deciduous forest is a type of ecosystem. Temperate deciduous forests have the following features: warm, wet summers and cold, wet winters, soil that is rich in nutrients, and only a few types of trees. So, Catoctin Mountain Park has soil that is rich in nutrients. It also has only a few types of trees. | |
Which solution has a higher concentration of yellow particles? | [
"neither; their concentrations are the same",
"Solution A",
"Solution B"
] | 0 | The diagram below is a model of two solutions. Each yellow 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 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 country is highlighted? | [
"the Marshall Islands",
"Kiribati",
"Nauru",
"Tuvalu"
] | 1 | closed choice | grade8 | social science | geography | Oceania: geography | Identify and select countries of Oceania | This country is Kiribati. | |||
Not supported with pagination yet | From Whitman's account, what probably happened at the battle? | [
"The Union army fought the Confederate army to a tie.",
"The Union army was defeated and forced to retreat.",
"The Union army won the battle and took Manassas Junction.",
"The Confederate army had burned down the Long Bridge."
] | 1 | In June 1861, the Union army marched south from Washington, D.C., into Virginia. Its goal was to seize Manassas Junction, an important railroad center.
The following passage is the memory of Walt Whitman, who was living in Washington, D.C., at the time. Use it to answer the question below.
The defeated troops [started]... | closed choice | grade4 | social science | us-history | The Civil War and Reconstruction | The Civil War: the First Battle of Bull Run to Gettysburg | Look at the underlined sentences from the passage.
The defeated troops [started] pouring into Washington over the Long Bridge at daylight on Monday, 22 nd July . . . all the men with this coating of sweat and rain, now recoiling back, pouring over the Long Bridge — a horrible march of twenty miles, returning to Washing... | |
What is the capital of Wyoming? | [
"Carson City",
"Santa Fe",
"Cheyenne",
"Hilo"
] | 2 | closed choice | grade3 | social science | geography | State capitals | Identify the 50 state capitals | Cheyenne is the capital of Wyoming. | |||
Not supported with pagination yet | What is the volume of a bathtub? | [
"90 fluid ounces",
"90 gallons",
"90 cups"
] | 1 | Select the best estimate. | closed choice | grade4 | 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 bathtub is 90 gallons.
90 fluid ounces and 90 cups are both too little. |
Not supported with pagination yet | Select the plant. | [
"Loons walk, fly, and swim.",
"Magnolia trees have many leaves."
] | 1 | closed choice | grade2 | natural science | biology | Classification | Identify plants and animals | Plants and animals are living things. Living things are called organisms.
Plants come in many shapes and sizes. Most plants grow in the ground. They might grow leaves, flowers, and fruit. Plants cannot move around on their own like animals can.
Animals also come in many shapes and sizes. Most animals can move around. A... | A loon is an animal. It walks, flies, and swims.
A loon is a bird. Loons live near lakes and dive in the water to hunt for food.
A magnolia tree is a plant. It has many green leaves.
Magnolia trees have red seeds. | |
Not supported with pagination yet | Which correctly shows the title of a book? | [
"***A Ball for Daisy***",
"\"A Ball for Daisy\""
] | 0 | closed choice | grade5 | language science | punctuation | Formatting | Formatting titles | The title of a book, movie, play, TV show, magazine, or newspaper should be in italics. If you write it by hand, it can be underlined instead.
A Midsummer Night's Dream
The title of a poem, song, article, or short story should be in quotation marks.
"You Are My Sunshine" | A book should be in italics.
The correct title is **A Ball for Daisy**. | |
Not supported with pagination yet | Select the one true statement. | [
"In an animal cell, the endoplasmic reticulum contains the master plan for cell activities and cell development.",
"Mitochondria break down sugar to release energy that a plant cell can use.",
"Chromosomes store nutrients, water, and waste in an animal cell."
] | 1 | closed choice | grade7 | natural science | biology | Cells | Compare cells and cell parts | |||
Not supported with pagination yet | Suppose Felix decides to buy a copy of the book. Which result would be a cost? | [
"Felix will get to keep the book as long as he wants.",
"Felix will spend money to buy the book."
] | 1 | Felix is deciding whether to buy a copy of a book or borrow it from the library. He would like to be able to keep the book as long as he wants, but buying the book would cost money. He could borrow the book for free, but he would have to return it in a few weeks. | 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 Felix wants or needs:
Felix will spend money to buy the book. |
What is the capital of Mississippi? | [
"Raleigh",
"Jackson",
"Frankfort",
"Lansing"
] | 1 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the Southeast | Jackson is the capital of Mississippi. | |||
Not supported with pagination yet | Which figure of speech is used in this text?
The old wooden rocking chair that Lacey brought home from the rummage sale was as comfortable as a bed of nails. | [
"alliteration",
"verbal irony"
] | 1 | closed choice | grade7 | 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 verbal irony, which involves saying one thing but implying something very different.
As comfortable as a bed of nails shows verbal irony because sitting on nails would not be comfortable. | |
Which statement describes the Eastern Siberian Taiga ecosystem? | [
"It has soil that is rich in nutrients.",
"It has many evergreen trees.",
"It has soil that is frozen year-round."
] | 1 | Figure: East Siberian Taiga.
The Eastern Siberian Taiga is a large forest that covers more than a quarter of Russia. It is home to brown bears, wolves, deer, and other organisms. | 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 taiga is a type of ecosystem. Taigas have the following features: long, cold winters and short, cool summers, many evergreen trees, and soil that is poor in nutrients. So, the following statement describes the Eastern Siberian Taiga ecosystem: long, cold winters and short, cool summers, many evergreen trees, and soil... | |
Think about the magnetic force between the magnets in each pair. Which of the following statements is true? | [
"The magnitude of the magnetic force is the same in both pairs.",
"The magnitude of the magnetic force is greater in Pair 1.",
"The magnitude of the magnetic force is greater in Pair 2."
] | 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, but some of them are different sizes and shapes. | closed choice | grade6 | natural science | physics | Velocity, acceleration, and forces | Compare magnitudes of magnetic forces | Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart. These pulls and pushes between magnets are called magnetic forces.
The strength of a force is called its magnitude. The greater the magnitude of the magnetic force between two magnets,... | Magnet sizes affect the magnitude of the magnetic force. Imagine magnets that are the same shape and made of the same material. The larger the magnets, the greater the magnitude of the magnetic force between them.
Magnet A is the same size in both pairs. But Magnet B is larger in Pair 2 than in Pair 1. So, the magnitud... | |
Not supported with pagination yet | Which figure of speech is used in this text?
Dr. Molina is unhappy with her new assistant because simple tasks, like fetching coffee, take him years to finish. | [
"hyperbole",
"oxymoron"
] | 0 | closed choice | grade12 | language science | figurative-language | Literary devices | Classify the figure of speech: euphemism, hyperbole, oxymoron, paradox | Figures of speech are words or phrases that use language in a nonliteral or unusual way. They can make writing more expressive.
A euphemism is a polite or indirect expression that is used to de-emphasize an unpleasant topic.
The head of Human Resources would never refer to firing people, only to laying them off.
Hyperb... | The text uses hyperbole, an obvious exaggeration that is not meant to be taken literally.
Take him years to finish is an exaggeration, since it probably does not take him entire years to fetch coffee. | |
Select the organism in the same species as the North American beaver. | [
"Ovis canadensis",
"Castor canadensis",
"Ilex cornuta"
] | 1 | This organism is a North American beaver. Its scientific name is Castor canadensis. | closed choice | grade7 | 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 North American beaver's scientific name is Castor canadensis.
Ilex cornuta does not have the same scientific name as a North American beaver. So, Castor canadensis and Ilex cornuta are not in the same species.
Castor canadensis has the same scientific name as a North American beaver. So, these organisms are in the sa... | |
Select the bird below. | [
"box turtle",
"robin"
] | 1 | Birds have feathers, two wings, and a beak. A flamingo is an example of a bird. | closed choice | grade2 | natural science | biology | Classification | Identify mammals, birds, fish, reptiles, and amphibians | Birds, mammals, fish, reptiles, and amphibians are groups of animals. The animals in each group have traits in common.
Scientists sort animals into groups based on traits they have in common. This process is called classification. | A box turtle is a reptile. It has scaly, waterproof skin.
A robin is a bird. It has feathers, two wings, and a beak. | |
Not supported with pagination yet | How long is the Amazon River? | [
"6,400 millimeters",
"6,400 meters",
"6,400 centimeters",
"6,400 kilometers"
] | 3 | 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 the Amazon River is 6,400 kilometers.
6,400 millimeters, 6,400 centimeters, and 6,400 meters are all too short. |
Not supported with pagination yet | The movers lift the boxes at the same speed. Which box is lifted with a larger force? | [
"a box holding 44 pounds",
"a box holding 38 pounds"
] | 0 | Two movers are putting heavy boxes into their truck. The boxes are the same shape and size. Each mover lifts one box up into the truck at a time. | closed choice | grade2 | natural science | physics | Force and motion | How do mass and force affect motion? | A force is a push or a pull.
A force can make an object start moving or stop an object that is moving. A force can also make an object speed up, slow down, or change direction.
Forces can be different sizes.
Think about trying to move a heavy object and a light object. Imagine you want to move them at the same speed. Y... | Look for the box that is heavier.
A box holding 44 pounds is heavier than a box holding 38 pounds. So, the box holding 44 pounds needs a larger force to start moving upward at the same speed as the other box. |
Not supported with pagination yet | What is the source of the allusion in the sentence below?
The artistic feats of the Italian Renaissance painters are seen as Promethean by most historians. | [
"Greek mythology",
"U.S. history"
] | 0 | closed choice | grade12 | 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 Promethean is Greek mythology.
In Greek mythology, Prometheus was a Titan who stole fire from the gods and gave it to humankind. Although Prometheus was punished by the gods, humanity's future was forever changed.
The allusion Promethean means boldly innovative. | |
Not supported with pagination yet | Which figure of speech is used in this text?
Tucker's leaving his job? That's old news. He's been planning that for months. | [
"euphemism",
"oxymoron"
] | 1 | closed choice | grade12 | language science | figurative-language | Literary devices | Classify the figure of speech: euphemism, hyperbole, oxymoron, paradox | Figures of speech are words or phrases that use language in a nonliteral or unusual way. They can make writing more expressive.
A euphemism is a polite or indirect expression that is used to de-emphasize an unpleasant topic.
The head of Human Resources would never refer to firing people, only to laying them off.
Hyperb... | The text uses an oxymoron, a joining of two seemingly contradictory terms.
Old news is a contradiction, because news is recent information. | |
What can Quincy and Kylie trade to each get what they want? | [
"Quincy can trade his tomatoes for Kylie's carrots.",
"Kylie can trade her almonds for Quincy's tomatoes.",
"Quincy can trade his tomatoes for Kylie's broccoli.",
"Kylie can trade her broccoli for Quincy's oranges."
] | 2 | Trade happens when people agree to exchange goods and services. People give up something to get something else. Sometimes people barter, or directly exchange one good or service for another.
Quincy and Kylie open their lunch boxes in the school cafeteria. Neither Quincy nor Kylie got everything that they wanted. The ta... | closed choice | grade7 | social science | economics | Basic economic principles | Trade and specialization | Look at the table and images.
Quincy wants broccoli. Kylie 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 | How long is an apple seed? | [
"7 centimeters",
"7 kilometers",
"7 meters",
"7 millimeters"
] | 3 | 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 an apple seed is 7 millimeters.
7 centimeters, 7 meters, and 7 kilometers are all too long. |
Which state is highlighted? | [
"Rhode Island",
"New York",
"Vermont",
"Maine"
] | 0 | closed choice | grade3 | social science | geography | States | Identify states of the Northeast | This state is Rhode Island. | |||
Does this passage describe the weather or the climate? | [
"climate",
"weather"
] | 0 | Figure: Nepal.
Nepal is home to Mount Everest, the world's tallest mountain. Nepal experiences cool and clear conditions each year during October, November, and December.
Hint: Weather is what the atmosphere is like at a certain place and time. Climate is the pattern of weather in a certain place. | closed choice | grade6 | natural science | earth-science | Weather and climate | Weather and climate around the world | The atmosphere is the layer of air that surrounds Earth. Both weather and climate tell you about the atmosphere.
Weather is what the atmosphere is like at a certain place and time. Weather can change quickly. For example, the temperature outside your house might get higher throughout the day.
Climate is the pattern of ... | Read the passage carefully.
Nepal is home to Mount Everest, the world's tallest mountain. Nepal experiences cool and clear conditions each year during October, November, and December.
The underlined part of the passage tells you about the usual temperature pattern in Nepal. This passage does not describe what the weath... | |
Which solution has a higher concentration of blue particles? | [
"Solution A",
"neither; their concentrations are the same",
"Solution B"
] | 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.
... | |
Not supported with pagination yet | Which water balloon has a lower temperature? | [
"the water balloon with less thermal energy",
"the water balloon with more thermal energy"
] | 0 | Two water balloons are identical except for their thermal energies. | closed choice | grade6 | natural science | physics | Thermal energy | How are temperature and mass related to thermal energy? | Matter is made of tiny particles called atoms. Atoms are always moving.
The energy of moving atoms is called thermal energy. The total amount of thermal energy in matter depends on three things: the type of matter, the amount of matter, and how fast the atoms are moving.
Temperature measures how hot or cold matter is. ... | The two water balloons are made of the same material and have the same mass. So, the water balloon with less thermal energy has a lower temperature. |
Not supported with pagination yet | Select the invertebrate. | [
"black widow spider",
"blue jay",
"wombat",
"common snapping turtle"
] | 0 | Hint: Insects, spiders, and worms are invertebrates. | closed choice | grade5 | natural science | biology | Classification | Identify vertebrates and invertebrates | Vertebrates and invertebrates are both groups of animals.
A vertebrate has a backbone. The backbone is made of many bones in an animal's back. A vertebrate's backbone helps connect the different parts of its body. In the drawings below, each vertebrate's backbone is colored orange.
An invertebrate does not have a backb... | A blue jay is a bird. Like other birds, a blue jay is a vertebrate. It has a backbone.
Like other spiders, a black widow spider is an invertebrate. It does not have a backbone. It has an exoskeleton.
A common snapping turtle is a reptile. Like other reptiles, a common snapping turtle is a vertebrate. It has a backbone.... |
What is the capital of Massachusetts? | [
"Raleigh",
"Providence",
"Plymouth",
"Boston"
] | 3 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the Northeast | Boston is the capital of Massachusetts. | |||
Which animal's skin is better adapted as a warning sign to ward off predators? | [
"lichen katydid",
"lionfish"
] | 1 | 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 l... | |
Based on the event chain, when does a goose join the loon's team? | [
"right before the Winter Wind joins the hawk's team",
"right after the birds decide to play a game of lacrosse"
] | 1 | This event chain shows the events from an Ojibwe legend. | closed choice | grade6 | language science | writing-strategies | Visual elements | Read graphic organizers | A graphic organizer is a chart or picture that shows how ideas, facts, or topics are related to one another.
When you read, look for graphic organizers included in the text. You can use these images to find key information. You can also create your own graphic organizers with information that you've read. Doing this ca... | An event chain uses arrows to show the order of events. This event chain shows the events from an Ojibwe legend.
Follow the arrows to see the order of events. The second event is A goose joins the loon's team, and an owl joins the hawk's team. The event Two birds, a loon and a hawk, decide to play a game of lacrosse ha... | |
Not supported with pagination yet | Which tense does the sentence use?
Our guests will stay for three days and two nights. | [
"present tense",
"future tense",
"past tense"
] | 1 | closed choice | grade4 | language science | verbs | Verb tense | Is the sentence in the past, present, or future tense? | Present tense verbs tell you about something that is happening now.
Most present-tense verbs are regular. They have no ending, or they end in -s or -es.
Two verbs are irregular in the present tense, to be and to have. You must remember their forms.
Past tense verbs tell you about something that has already happened.
Mo... | The sentence is in future tense. You can tell because it uses will before the main verb, stay. The verb tells you about something that is going to happen. | |
Compare the average kinetic energies of the particles in each sample. Which sample has the higher temperature? | [
"sample A",
"sample B",
"neither; the samples have the same temperature"
] | 0 | The diagrams below show two pure samples of gas in identical closed, rigid containers. Each colored ball represents one gas particle. Both samples have the same number of particles. | closed choice | grade8 | natural science | physics | Particle motion and energy | Identify how particle motion affects temperature and pressure | The temperature of a substance depends on the average kinetic energy of the particles in the substance. The higher the average kinetic energy of the particles, the higher the temperature of the substance.
The kinetic energy of a particle is determined by its mass and speed. For a pure substance, the greater the mass of... | The particles in both samples have the same average speed, but each particle in sample A has more mass than each particle in sample B. So, the particles in sample A have a higher average kinetic energy than the particles in sample B.
Because the particles in sample A have the higher average kinetic energy, sample A mus... | |
Select the organism in the same species as the common kestrel. | [
"Balearica pavonina",
"Pelecanus rufescens",
"Falco tinnunculus"
] | 2 | This organism is a common kestrel. Its scientific name is Falco tinnunculus. | 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 common kestrel's scientific name is Falco tinnunculus.
Falco tinnunculus has the same scientific name as a common kestrel. So, these organisms are in the same species.
Pelecanus rufescens does not have the same scientific name as a common kestrel. So, Falco tinnunculus and Pelecanus rufescens are not in the same spec... | |
Which of these states is farthest west? | [
"South Dakota",
"South Carolina",
"Florida",
"Maine"
] | 0 | closed choice | grade4 | social science | geography | Maps | Read a map: cardinal directions | Maps have four cardinal directions, or main directions. Those directions are north, south, east, and west.
A compass rose is a set of arrows that point to the cardinal directions. A compass rose usually shows only the first letter of each cardinal direction.
The north arrow points to the North Pole. On most maps, north... | To find the answer, look at the compass rose. Look at which way the west arrow is pointing. South Dakota is farthest west. | ||
Is the following statement about our solar system true or false?
Jupiter's volume is more than 10,000 times as large as the volume of Mars. | [
"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 determine if this statement is true, calculate the value of 10,000 times the volume of Mars.
Then compare the result to the volume of Jupiter. Jupiter's volume is 1.43 x 10^15 km^3, which is less than 1.63 x 10^15 km^3. So, Jupiter's volume is less than 10,000 times as large as the volume of Mars. | |
Not supported with pagination yet | Does this passage describe the weather or the climate?
It has not rained in over a week at Laura's house. | [
"climate",
"weather"
] | 1 | Hint: Weather is what the atmosphere is like at a certain place and time. Climate is the pattern of weather in a certain place. | closed choice | grade3 | natural science | earth-science | Weather and climate | What's the difference between weather and climate? | The atmosphere is the layer of air that surrounds Earth. Both weather and climate tell you about the atmosphere.
Weather is what the atmosphere is like at a certain place and time. Weather can change quickly. For example, the temperature outside your house might get higher throughout the day.
Climate is the pattern of ... | Read the text carefully.
It has not rained in over a week at Laura's house.
This passage tells you about the precipitation last week at Laura's house. It describes the atmosphere at a certain place and time. So, this passage describes the weather. |
What is the name of the colony shown? | [
"Rhode Island",
"Ohio",
"New Hampshire",
"Vermont"
] | 2 | closed choice | grade4 | 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. | |||
Based on the timeline, which of the following statements is true? | [
"Hinduism began about 1,000 years before Buddhism.",
"Hinduism began about 3,000 years before Islam.",
"Hinduism began about 500 years before Judaism."
] | 0 | The following timeline shows the approximate dates when several world religions began. Look at the timeline. Then answer the question below. | closed choice | grade6 | social science | world-history | World religions | Origins of Hinduism | |||
What is the capital of California? | [
"Sacramento",
"San Francisco",
"Los Angeles",
"Concord"
] | 0 | closed choice | grade5 | social science | geography | State capitals | Identify the 50 state capitals | Sacramento is the capital of California. | |||
Not supported with pagination yet | Which correctly shows the title of a song? | [
"\"the wheels on the Bus\"",
"\"The Wheels on the Bus\""
] | 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 on and the are not important, so they should not be capitalized.
The correct title is "The Wheels on the Bus." | |
Not supported with pagination yet | Which of the following contains a vague pronoun reference? | [
"Jake went on to calculus after studying trigonometry, but he never fully comprehended calculus.",
"Jake went on to calculus after studying trigonometry, but he never fully comprehended it."
] | 1 | closed choice | grade10 | language science | writing-strategies | Pronouns | Identify vague pronoun references | When writing, make sure to avoid vague pronoun references. A vague pronoun reference occurs when a pronoun could refer to more than one possible antecedent.
When Lisa and Kim finally landed, she breathed a sigh of relief.
The pronoun she could refer to either Lisa or Kim, so the meaning of the sentence is unclear.
Vagu... | The first answer choice contains a vague pronoun reference. The pronoun it could refer to calculus or trigonometry.
The second answer choice shows a possible correction for the vague pronoun reference. It has been replaced with calculus.
Jake went on to calculus after studying trigonometry, but he never fully comprehen... | |
Not supported with pagination yet | What information supports the conclusion that Austin inherited this trait? | [
"Austin and his father both have dark hair.",
"Austin's parents have pale skin. They passed down this trait to Austin."
] | 1 | Read the description of a trait.
Austin has pale skin. | closed choice | grade5 | natural science | biology | Traits and heredity | Inherited and acquired traits: use evidence to support a statement | Organisms, including people, have both inherited and acquired traits. Inherited and acquired traits are gained in different ways.
Inherited traits are passed down through families. Children gain these traits from their parents. Inherited traits do not need to be learned.
Acquired traits are gained during a person's lif... | |
What is the capital of Kansas? | [
"Madison",
"Jefferson City",
"Boston",
"Topeka"
] | 3 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the Midwest | Topeka is the capital of Kansas. | |||
Which animal's limbs are also adapted for climbing trees? | [
"Galapagos giant tortoise",
"white-cheeked gibbon"
] | 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 white-cheeked gibbon has long limbs with fingers and toes. Its lim... | |
Not supported with pagination yet | Which logical fallacy is used in the text?
Before I refute my opponent's argument, I would like to draw attention to the fact that he is sweating and clearly does not have much experience on the debate team. | [
"ad hominem: an attack against the person making the argument, rather than the argument itself",
"bandwagon fallacy: the assumption that the popular choice is automatically correct",
"appeal to nature: the assumption that natural things are always good"
] | 0 | closed choice | grade11 | language science | writing-strategies | Developing and supporting arguments | Classify logical fallacies | A strong argument uses valid reasoning and logic in support of a claim. When an argument or claim introduces irrelevant information or misrepresents the issues at hand, it may be committing a logical fallacy. Logical fallacies can hurt a writer's credibility and can lead readers to draw false conclusions.
A logical fal... | The text argues that the speaker's debate opponent is sweaty and inexperienced. This is a personal attack that isn't relevant to whether the opponent's argument is valid. This illustrates a type of logical fallacy known as ad hominem. | |
Not supported with pagination yet | Which type of sentence is this?
An avid reader, Jayden attends weekly book club meetings, and he finishes several novels every month. | [
"compound",
"compound-complex",
"simple",
"complex"
] | 0 | closed choice | grade7 | language science | grammar | Phrases and clauses | Is the sentence simple, compound, complex, or compound-complex? | A clause is a group of words that contains both a subject and a predicate.
An independent clause is a complete thought that can stand alone as a sentence. A dependent clause (or subordinate clause) is not a complete thought and cannot stand alone as a sentence.
the oranges on our tree are ripe
The clause can stand alon... | The sentence is compound. It is made up of two independent clauses joined by the coordinating conjunction and.
An avid reader, Jayden attends weekly book club meetings, and he finishes several novels every month. | |
What is the capital of Montana? | [
"Anchorage",
"Helena",
"Billings",
"Sacramento"
] | 1 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the West | Helena is the capital of Montana. | |||
Not supported with pagination yet | Which tense does the sentence use?
My sister will place the plates and bowls on the table. | [
"future tense",
"past tense",
"present tense"
] | 0 | closed choice | grade4 | language science | verbs | Verb tense | Is the sentence in the past, present, or future tense? | Present tense verbs tell you about something that is happening now.
Most present-tense verbs are regular. They have no ending, or they end in -s or -es.
Two verbs are irregular in the present tense, to be and to have. You must remember their forms.
Past tense verbs tell you about something that has already happened.
Mo... | The sentence is in future tense. You can tell because it uses will before the main verb, place. The verb tells you about something that is going to happen. | |
Which solution has a higher concentration of green particles? | [
"Solution A",
"neither; their concentrations are the same",
"Solution B"
] | 2 | The diagram below is a model of two solutions. Each green ball represents one particle of solute. | closed choice | 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 green particles represent the solute. To figure out which solution has a higher concentration of green particles, look at both the number of green particles and the volume of the solvent in each container.
Use the concentration formula to find the number of green particles per millilit... | |
Not supported with pagination yet | Which greeting is correct for a letter? | [
"Dear dr. larson,",
"Dear Dr. Larson,"
] | 1 | closed choice | grade2 | language science | capitalization | Capitalization | Greetings and closings of letters | A letter starts with a greeting and ends with a closing. For each one, capitalize the first word and end with a comma. You should also capitalize proper nouns, such as Aunt Sue.
Dear Aunt Sue,
I'm glad you could come to my party, and
thank you for the birthday gift. I could not have
asked for a better one! Every time I... | The second greeting is correct:
Its first word is capitalized, and it ends with a comma. Dr. Larson is capitalized because it is a proper noun. | |
Not supported with pagination yet | Read the following excerpt from a student essay. How can the writer best improve his or her ideas and development?
An elephant's trunk has many purposes, including breathing, smelling, drinking, lifting, and communicating. It contains about one hundred thousand different muscles. Elephants have a very long gestation pe... | [
"by including more details",
"by clearly stating the main idea",
"by focusing on one main idea"
] | 2 | closed choice | grade11 | language science | writing-strategies | Editing and revising | Suggest appropriate revisions | During peer review, you read and respond to a fellow student's writing. While there are many methods and strategies that you can use for reviewing a text, it is generally helpful to frame your suggestions in concrete and constructive ways and to consider the following areas for revision:
Ideas and development: Does the... | The writer could best improve his or her ideas and development by focusing on one main idea.
For example, the writer could choose one of the underlined ideas and develop it more fully instead of touching on several different ideas.
An elephant's trunk has many purposes, including breathing, smelling, drinking, lifting,... | |
Select the organism in the same genus as the rough-skinned newt. | [
"Taricha torosa",
"Ambystoma texanum",
"Lissotriton helveticus"
] | 0 | This organism is a rough-skinned newt. Its scientific name is Taricha granulosa. | 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 rough-skinned newt's scientific name is Taricha granulosa. The first word of its scientific name is Taricha.
Taricha torosa is in the genus Taricha. The first word of its scientific name is Taricha. So, Taricha torosa and Taricha granulosa are in the same genus.
Ambystoma texanum is in the genus Ambystoma. The first ... | |
Not supported with pagination yet | Which would stretch the most? | [
"nylon swim shorts",
"soap bar",
"glass cup"
] | 0 | 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... | Stretchy is a property. A stretchy material gets longer when you pull on it.
Look at each picture, one at a time. Imagine pulling on the material shown in each picture.
Of the choices, the nylon swim shorts would stretch the most. If you pull the leg opening on a pair of nylon swim shorts, it will get wider. | |
Not supported with pagination yet | Would you find the word petrify on a dictionary page with the following guide words?
piece - politics | [
"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 petrify is not between the guide words piece - politics, it would not be found on that page. | |
Not supported with pagination yet | Which type of sentence is this?
As Johnny sat down on the rickety old chair, it abruptly collapsed beneath him. | [
"simple",
"compound",
"complex",
"compound-complex"
] | 2 | closed choice | grade7 | language science | grammar | Phrases and clauses | Is the sentence simple, compound, complex, or compound-complex? | A clause is a group of words that contains both a subject and a predicate.
An independent clause is a complete thought that can stand alone as a sentence. A dependent clause (or subordinate clause) is not a complete thought and cannot stand alone as a sentence.
the oranges on our tree are ripe
The clause can stand alon... | The sentence is complex. It is made up of an independent clause and a dependent clause. The dependent clause begins with the subordinating conjunction as.
As Johnny sat down on the rickety old chair, it abruptly collapsed beneath him. | |
Not supported with pagination yet | Look at the word. Does it have a closed syllable or an open syllable?
at | [
"closed",
"open"
] | 0 | closed choice | grade2 | language science | word-study | Short and long vowels | Is the syllable open or closed? | Words are made up of syllables. Two kinds of syllables are closed and open.
A closed syllable has one vowel and ends with a consonant. It usually has a short vowel sound.
desk: short e
kit / ten: short i / short e
An open syllable ends with one vowel. It usually has a long vowel sound.
go: long o
he / ro: long e / long... | The word at ends with a consonant and has a short vowel sound. So, it has a closed syllable. | |
Not supported with pagination yet | Which correctly shows the title of a poem? | [
"\"Casey at the Bat\"",
"Casey at the Bat"
] | 0 | closed choice | grade9 | language science | punctuation | Formatting | Formatting titles | The title of a book, movie, play, TV show, magazine, or newspaper should be in italics. If you write it by hand, it can be underlined instead.
A Midsummer Night's Dream
The title of a poem, song, article, or short story should be in quotation marks.
"You Are My Sunshine" | A poem should be in quotation marks.
The correct title is "Casey at the Bat." | |
Not supported with pagination yet | Does this passage describe the weather or the climate?
It is snowing in Colleen's town today. | [
"climate",
"weather"
] | 1 | Hint: Weather is what the atmosphere is like at a certain place and time. Climate is the pattern of weather in a certain place. | closed choice | grade4 | natural science | earth-science | Weather and climate | What's the difference between weather and climate? | The atmosphere is the layer of air that surrounds Earth. Both weather and climate tell you about the atmosphere.
Weather is what the atmosphere is like at a certain place and time. Weather can change quickly. For example, the temperature outside your house might get higher throughout the day.
Climate is the pattern of ... | Read the text carefully.
It is snowing in Colleen's town today.
This passage tells you about the precipitation today in Colleen's town. It describes the atmosphere at a certain place and time. So, this passage describes the weather. |
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.