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Which sentence states a fact?
[ "The book Charlotte's Web has an unhappy ending.", "Written by E. B. White, Charlotte's Web was first printed in 1952." ]
1
closed choice
grade4
language science
writing-strategies
Developing and supporting arguments
Distinguish facts from opinions
A fact is something that can be proved to be true. The month of July has more days than the month of June. This is a fact. It can be proved by looking at a calendar and counting the number of days in each month. An opinion is something that a person believes, thinks, or feels. An opinion cannot be proved true. July is ...
The second sentence states a fact. Written by E. B. White, Charlotte's Web was first printed in 1952. It can be proved by checking inside the book's front cover. The first sentence states an opinion. The book Charlotte's Web has an unhappy ending. Unhappy shows what a person believes, thinks, or feels. Another person m...
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Select the temperature shown by this thermometer.
[ "120°F", "95°F", "105°F" ]
2
closed choice
grade3
natural science
units-and-measurement
Weather and climate
Read a thermometer
A thermometer is a tool that measures temperature. Temperature can be measured in degrees. The symbol for degrees is °. Some thermometers measure temperature in degrees Fahrenheit (°F). Fahrenheit is one scale used to measure temperature. This is a tube thermometer. It has a tube filled with a red liquid. There is a Fa...
Find the top of the red liquid. Now look at the scale to the right. The top of the red liquid is halfway between 100 and 110. So, the temperature is 105°F.
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Which figure of speech is used in this text? Lexi, please stay away from the ocean. You shouldn't go in the water until you know how to swim.
[ "oxymoron", "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. You shouldn't go in the water until you know how to swim at first appears to be contradictory, because it is impossible to learn how to swim without going in the water. However, it contains some...
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Use the evidence in the text to select the photosynthetic organism.
[ "Stinging nettle slug caterpillars are covered in sharp spines that protect them from predators. These caterpillars get the energy they need to live by eating leaves.", "Aloe ferox plants have thick, spiny leaves and red flowers. These plants make sugars from carbon dioxide and water. The plants get the energy th...
1
closed choice
grade7
natural science
biology
Photosynthesis
Identify the photosynthetic organism
Organisms that carry out photosynthesis are called photosynthetic organisms. During photosynthesis, these organisms use light energy, carbon dioxide, and water to produce sugars and oxygen. Photosynthetic organisms also often have the following characteristics: They are producers, which are organisms that make their ow...
This organism is photosynthetic: The text tells you that Aloe ferox plants get energy from the sugars they make using carbon dioxide and water. This is evidence that the Aloe ferox plant is a photosynthetic organism. This organism is not photosynthetic: The text does not provide evidence that the stinging nettle slug c...
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Which of the following contains a vague pronoun reference?
[ "Mrs. Harper informed her assistant that she had to book a flight to Seoul immediately.", "Mrs. Harper told her assistant to book a flight to Cedarburg immediately." ]
0
closed choice
grade10
language science
writing-strategies
Pronouns
Identify vague pronoun references
When writing, make sure to avoid vague pronoun references. A vague pronoun reference occurs when a pronoun could refer to more than one possible antecedent. When Lisa and Kim finally landed, she breathed a sigh of relief. The pronoun she could refer to either Lisa or Kim, so the meaning of the sentence is unclear. Vagu...
The first answer choice contains a vague pronoun reference. The pronoun she could refer to Mrs. Harper or her assistant. Mrs. Harper informed her assistant that she had to book a flight to Seoul immediately. The second answer choice shows a possible correction for the vague pronoun reference. The text has been rewritte...
Which country is highlighted?
[ "New Zealand", "Australia", "Solomon Islands", "Papua New Guinea" ]
1
closed choice
grade8
social science
geography
Oceania: geography
Identify and select countries of Oceania
This country is Australia. Is Australia a country or a continent? Both! Australia is a country in Oceania, a region made up of many lands and islands in the Pacific Ocean. Many people say that Australia is the world's smallest continent. But some people call Oceania a continent instead.
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Which tense does the sentence use? Dad will love your surprise gift!
[ "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, love. The verb tells you about something that is going to happen.
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By 1860, there were almost four million enslaved African American people in the United States. What is an enslaved person?
[ "a person who works for someone else for 4 to 7 years", "a person who is owned by someone else", "a person who is a criminal", "a person who is drafted into the army" ]
1
closed choice
grade5
social science
us-history
Early 19th century American history
Antebellum Period: abolitionist and proslavery perspectives
An enslaved person is a person who is owned by someone else. Slaveholders in the 1800 s had the power to sell, punish, and work an enslaved person. By the antebellum period, or the time period leading up to the Civil War, African American people had been enslaved in North America for over 300 years. By 1860, there were...
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Which of the following contains a vague pronoun reference?
[ "Before Ken decided on a double major in history and Russian literature, he talked to them about the requirements for each major.", "Before Ken decided on a double major in history and Russian literature, he talked to academic advisers about the requirements for each major." ]
0
closed choice
grade11
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 them is used without its antecedent. The second answer choice shows a possible correction for the vague pronoun reference. Them has been replaced with academic advisers. Before Ken decided on a double major in history and Russian literature, he tal...
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Which logical fallacy is used in the text? I used to love this TV show, but then I found out that Shane likes it, too. So I changed my opinion—if someone like Shane likes a show, it can't be as good as I thought!
[ "guilt by association: a negative association intended to discredit someone or something", "straw man: a misrepresentation of an opponent's position that makes it easier to argue against", "slippery slope fallacy: the false assumption that a small first step will lead to extreme consequences" ]
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 a television show must be bad because someone the speaker hates enjoys it. However, this is not evidence that the show is bad. This illustrates a type of logical fallacy known as guilt by association.
Which animal is also adapted for flight?
[ "brahminy kite", "nilgai" ]
0
Flying foxes live in the forests of Southeast Asia and Australia. The has wings. It is adapted for flight. Figure: flying fox.
closed choice
grade5
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 flying fox. The flying fox has large, powerful wings. It is adapted for flight. Long, powerful wings help the flying fox travel long distances by air. Now look at each animal. Figure out which animal has a similar adaptation. The brahminy kite has long, powerful wings. It is adapted for fligh...
What is the capital of Michigan?
[ "Lansing", "Grand Rapids", "San Francisco", "Portland" ]
0
closed choice
grade4
social science
geography
State capitals
Identify state capitals of the Midwest
Lansing is the capital of Michigan.
Compare the average kinetic energies of the particles in each sample. Which sample has the higher temperature?
[ "neither; the samples have the same temperature", "sample A", "sample B" ]
2
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 sample B has more mass than each particle in sample A. The particles in sample B also 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 ...
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Select the mammal.
[ "bottlenose dolphin", "red-headed poison frog", "cane toad", "parrotfish" ]
0
closed choice
grade5
natural science
biology
Classification
Identify mammals, birds, fish, reptiles, and amphibians
Mammals have hair or fur and feed their young milk.
A red-headed poison frog is an amphibian. It has moist skin and begins its life in water. Poison dart frogs come in many bright colors. Their bright color warns other animals that these frogs are poisonous. A parrotfish is a fish. It lives underwater. It has fins, not limbs. Parrotfish have fins and live underwater nea...
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Suppose Wanda decides to get the rainbow sherbet ice cream. Which result would be a cost?
[ "Wanda will give up the chance to eat the peach ice cream. She likes this flavor more than rainbow sherbet.", "Wanda will get a free waffle cone. She will enjoy the waffle cone." ]
0
Wanda is deciding whether to get peach ice cream or rainbow sherbet ice cream. She likes peach more than rainbow sherbet. But a scoop of rainbow sherbet ice cream comes with a free waffle cone.
closed choice
grade5
social science
economics
Basic economic principles
Costs and benefits
Before you decide to do something, it is often helpful to list costs and benefits. Costs are what you give up or spend when you decide to do something. Costs involve giving up things that you want or need. Benefits are what you gain or save when you decide to do something. Benefits involve gaining something that you wa...
This result is a cost. It involves giving up or spending something that Wanda wants or needs: Wanda will give up the chance to eat the peach ice cream. She likes this flavor more than rainbow sherbet.
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Using only these supplies, which question can Billy investigate with an experiment?
[ "Does vegetable oil separate faster when stirred together with vinegar or with water?", "Does vinegar separate faster when stirred together with olive oil or with coconut oil?", "Does vegetable oil separate faster when stirred together with cold water or with hot water?" ]
0
Billy mixes oil and vinegar to make salad dressing. He notices that after a few minutes, the oil and vinegar separate. He wonders what factors affect how quickly liquids separate. So, he decides to design an experiment. He has the following supplies available: three glass bottles olive oil vegetable oil vinegar cold wa...
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...
Complete the sentence. The Andean Volcanic Belt formed at a () boundary.
[ "convergent", "divergent", "transform" ]
0
Read the passage and look at the picture. The Andean Volcanic Belt spans the west coast of South America. This volcanic belt began to form when the Nazca Plate moved toward and subducted, or sank, below the South American Plate. Nineteen of the volcanoes in the Andean Volcanic Zone are in Colombia. Some of these volcan...
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 divergent boundary, two plates are moving away from each other. At a trans...
To figure out what type of plate boundary formed the Andean Volcanic Belt, you need to know how the tectonic plates interacted. To find this out, read the passage carefully. The Andean Volcanic Belt spans the west coast of South America. This volcanic belt began to form when the Nazca Plate moved toward and subducted, ...
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
grade6
natural science
chemistry
Solutions
Compare concentrations of solutions
A solution is made up of two or more substances that are completely mixed. In a solution, solute particles are mixed into a solvent. The solute cannot be separated from the solvent by a filter. For example, if you stir a spoonful of salt into a cup of water, the salt will mix into the water to make a saltwater solution...
In Solution A and Solution B, the 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...
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Which correctly shows the title of a magazine?
[ "***Art of the West***", "\"Art of the West\"" ]
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 magazine should be in italics. The correct title is **Art of the West**.
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Is the following trait inherited or acquired? Alexa has naturally red hair.
[ "inherited", "acquired" ]
0
Hint: Some people dye their hair. But this does not change their natural hair color.
closed choice
grade4
natural science
biology
Traits and heredity
Identify inherited and acquired traits
Organisms, including people, have both inherited and acquired traits. Inherited and acquired traits are gained in different ways. Inherited traits are passed down through families. Children gain these traits from their parents. Inherited traits do not need to be learned. Acquired traits are gained during a person's lif...
Humans do not choose their natural hair color. Instead, children get their natural hair color from their parents. So, Alexa's hair color is an inherited trait.
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Complete the sentence. A seedling is ().
[ "a young plant", "a plant that makes seeds", "a part of a seed" ]
0
closed choice
grade4
natural science
biology
Plants
Describe and construct conifer life cycles
Conifers are plants that grow cones. Conifers use their cones to reproduce, or make new plants like themselves. How do conifers use their cones to reproduce? Conifers can grow male and female cones. Male cones make pollen, and female cones make eggs. Pollination is what happens when wind blows pollen from male cones on...
A seedling is a young plant. A seedling will grow into an adult plant.
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.
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 2 attract. The magnets in Pair 1 repel. But whether the magnets attract or repel affects only the direction of the magnetic force. It does not affect the magnitude of the magnetic force. Distance affects the magnitude of the magnetic force. When there is a smaller distance between magnets, the magni...
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What information supports the conclusion that Wendy acquired this trait?
[ "Wendy likes to look at butterflies and beetles.", "Wendy learned to identify insects by reading many books about insects." ]
1
Read the description of a trait. Wendy is good at identifying insects.
closed choice
grade4
natural science
biology
Traits and heredity
Inherited and acquired traits: use evidence to support a statement
Organisms, including people, have both inherited and acquired traits. Inherited and acquired traits are gained in different ways. Inherited traits are passed down through families. Children gain these traits from their parents. Inherited traits do not need to be learned. Acquired traits are gained during a person's lif...
What is the capital of South Dakota?
[ "Pierre", "Topeka", "Boston", "Rapid City" ]
0
closed choice
grade4
social science
geography
State capitals
Identify state capitals of the Midwest
Pierre is the capital of South Dakota.
What is the probability that a fruit fly produced by this cross will be homozygous dominant for the antenna type gene?
[ "0/4", "1/4", "4/4", "2/4", "3/4" ]
1
This passage describes the antenna type trait in fruit flies: Most fruit flies have a pair of antennae on their head. But, some flies appear to have an extra pair of legs on their head instead! These flies have a mutation, or change, in a gene that affects body development. This mutation makes the cells in the fly's he...
closed choice
grade8
natural science
biology
Genes to traits
Use Punnett squares to calculate probabilities of offspring types
Offspring genotypes: homozygous or heterozygous? How do you determine whether an organism is homozygous or heterozygous for a gene? Look at the alleles in the organism's genotype for that gene. An organism with two identical alleles for a gene is homozygous for that gene. If both alleles are dominant, the organism is h...
Based on the timeline, which statement is true?
[ "The Boston Massacre was the first battle of the Revolutionary War.", "The First Continental Congress met before the Revolutionary War began." ]
1
Between 1775 and 1783, Americans fought the British in the Revolutionary War. Look at the timeline of events in the years before the war. Then answer the question.
closed choice
grade8
social science
us-history
The American Revolution
The Revolutionary War: preparing for war
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Which of the following contains a vague pronoun reference?
[ "After discussing the new research methods with Annie, Susan decided to try some of them out.", "After Susan discussed the new research methods with Annie, she decided to try some of them out." ]
1
closed choice
grade10
language science
writing-strategies
Pronouns
Identify vague pronoun references
When writing, make sure to avoid vague pronoun references. A vague pronoun reference occurs when a pronoun could refer to more than one possible antecedent. When Lisa and Kim finally landed, she breathed a sigh of relief. The pronoun she could refer to either Lisa or Kim, so the meaning of the sentence is unclear. Vagu...
The second answer choice contains a vague pronoun reference. The pronoun she could refer to Susan or Annie. After Susan discussed the new research methods with Annie, she decided to try some of them out. The first answer choice shows a possible correction for the vague pronoun reference. The text has been rewritten so ...
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What information supports the conclusion that Polly acquired this trait?
[ "Polly is most interested in human biology.", "Polly learned biology by reading, observing, and experimenting." ]
1
Read the description of a trait. Polly knows a lot about biology.
closed choice
grade4
natural science
biology
Traits and heredity
Inherited and acquired traits: use evidence to support a statement
Organisms, including people, have both inherited and acquired traits. Inherited and acquired traits are gained in different ways. Inherited traits are passed down through families. Children gain these traits from their parents. Inherited traits do not need to be learned. Acquired traits are gained during a person's lif...
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Based on this information, what is this fly's phenotype for the antenna type trait?
[ "mutated antennae", "normal antennae" ]
1
This passage describes the antenna type trait in fruit flies: In a group of fruit flies, some individuals have mutated antennae and others have normal antennae. In this group, the gene for the antenna type trait has two alleles. The allele for normal antennae (a) is recessive to the allele for mutated antennae (A). A ...
closed choice
grade8
natural science
biology
Genes to traits
Genetics vocabulary: dominant and recessive
All organisms have pieces of hereditary material called genes, which are passed from parents to offspring. Genes contain instructions for building the parts of an organism. An organism's genes affect its observable traits, including its appearance, its behavior, and which diseases it may have. Genes may have different ...
The fruit fly's genotype for the antenna type gene is aa. The fruit fly's genotype of aa has only a alleles. The a allele is for normal antennae. So, the fruit fly's phenotype for the antenna type trait must be normal antennae. To check this answer, consider whether the fruit fly's alleles are dominant or recessive. Th...
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Which type of sentence is this? As Colton sat down on the rickety old chair, it abruptly collapsed beneath him.
[ "compound", "compound-complex", "simple", "complex" ]
3
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 complex. It is made up of an independent clause and a dependent clause. The dependent clause begins with the subordinating conjunction as. As Colton sat down on the rickety old chair, it abruptly collapsed beneath him.
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Suppose Charlotte decides to go on the roller coaster. Which result would be a cost?
[ "Charlotte will save some ride tickets. She needs fewer tickets to go on the roller coaster than on the flying bobsled.", "Charlotte will give up the chance to go on the flying bobsled. She would have had more fun on that ride." ]
1
Charlotte is deciding which ride to go on at the fair. She can go on either the flying bobsled or the roller coaster. She wants to have as much fun as possible at the fair.
closed choice
grade5
social science
economics
Basic economic principles
Costs and benefits
Before you decide to do something, it is often helpful to list costs and benefits. Costs are what you give up or spend when you decide to do something. Costs involve giving up things that you want or need. Benefits are what you gain or save when you decide to do something. Benefits involve gaining something that you wa...
This result is a cost. It involves giving up or spending something that Charlotte wants or needs: Charlotte will give up the chance to go on the flying bobsled. She would have had more fun on that ride.
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How long is a paper clip?
[ "25 millimeters", "25 kilometers", "25 meters" ]
0
Select the best estimate.
closed choice
grade5
natural science
units-and-measurement
Units and measurement
Choose metric units of distance
Measurements are written with both a number and a unit. The unit comes after the number. The unit shows what the number means. When you are using metric units, length can be written with units of millimeters, centimeters, meters, or kilometers. One meter contains 100 centimeters or 1,000 millimeters. So, 1 meter is lar...
The best estimate for the length of a paper clip is 25 millimeters. 25 meters and 25 kilometers are both too long.
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What is the mass of a small candy bar?
[ "60 grams", "60 kilograms" ]
0
Select the better estimate.
closed choice
grade5
natural science
units-and-measurement
Units and measurement
Choose metric units of mass
Measurements are written with both a number and a unit. The unit comes after the number. The unit shows what the number means. Mass is a measurement of how much matter something contains. There are many different units of mass. When you are using metric units, mass may be written with units of grams or kilograms. There...
The better estimate for the mass of a small candy bar is 60 grams. 60 kilograms is too heavy.
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.
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What is the source of the allusion in the sentence below? Vince's remark about your new car is clearly a case of sour grapes.
[ "a fable", "Greek mythology" ]
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 sour grapes is a fable. In the fable "The Fox and the Grapes," a fox tries unsuccessfully to reach a bunch of grapes. Because he cannot reach them and therefore cannot eat them, he tells himself that they must be sour. The allusion sour grapes means criticizing something because you can't hav...
What is the capital of Iowa?
[ "Saint Paul", "Des Moines", "Madison", "Jefferson City" ]
1
closed choice
grade3
social science
geography
State capitals
Identify state capitals of the Midwest
Des Moines is the capital of Iowa.
Why might grooming eggs increase the reproductive success of a female European earwig? Complete the claim below that answers this question and is best supported by the passage. Grooming eggs increases the chances that ().
[ "the female will spend time near her offspring", "the female will produce more eggs", "the female's offspring will survive" ]
2
Animals often behave in certain ways that can increase their reproductive success. Read the passage about a specific animal behavior. Then, follow the instructions below. European earwigs are small insects that raise their offspring in cool, moist soil. After earwigs mate, females lay their eggs in underground nests. ...
closed choice
grade8
natural science
literacy-in-science
Adaptations and natural selection
How can animal behaviors affect reproductive success? Identify evidence to support a claim
Animals increase their reproductive success when they have offspring that survive to reproduce. Animals can increase their chances of having offspring by behaving in ways that help them get partners to mate and reproduce with. These partners are called mates. For example, animals may make special sounds, perform specif...
Look for the part of the passage that describes the effect of grooming eggs. Use this information to determine why this behavior can increase the reproductive success of the female European earwig. Choice "European earwigs are small insects that raise their offspring in cool, moist soil. After earwigs mate, females lay...
Which statement describes the Oglala National Grassland ecosystem?
[ "It has hot summers and cool winters.", "It has heavy rain.", "It has cold winters and cool summers." ]
0
Figure: Oglala National Grassland. Oglala National Grassland is a prairie grassland ecosystem in northwestern Nebraska. This grassland contains large rock formations called badlands.
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 prairie grassland is a type of ecosystem. Prairie grasslands have the following features: hot summers and cool winters, a medium amount of rain, and soil that is rich in nutrients. So, the following statement describes the Oglala National Grassland ecosystem: hot summers and cool winters, a medium amount of rain, and...
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Which figure of speech is used in this text? I must have eaten too much of Antonio's homemade chili, because now I'm so full I could explode!
[ "paradox", "hyperbole" ]
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 hyperbole, an obvious exaggeration that is not meant to be taken literally. So full I could explode is an exaggeration, since it is clear that the speaker is not actually in danger of exploding.
Which material is this bridge made of?
[ "concrete", "linen" ]
0
closed choice
grade2
natural science
physics
Materials
Identify multiple materials in objects
A material is a type of matter. Wood, glass, metal, and plastic are common materials. Some objects are made of just one material. Most nails are made of metal. Other objects are made of more than one material. This hammer is made of metal and wood.
Look at the picture of the bridge. The bridge is made of two different materials. The surface is concrete. The rest of the bridge is made of metal. Concrete and metal are good materials to build bridges with. Both materials are strong. They hold up well in cold or rainy weather.
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Which tense does the sentence use? Ian will pitch the ball quickly.
[ "future tense", "present tense", "past tense" ]
0
closed choice
grade3
language science
verbs
Verb tense
Is the sentence in the past, present, or future tense?
Present tense verbs tell you about something that is happening now. Most present-tense verbs are regular. They have no ending, or they end in -s or -es. Two verbs are irregular in the present tense, to be and to have. You must remember their forms. Past tense verbs tell you about something that has already happened. Mo...
The sentence is in future tense. You can tell because it uses will before the main verb, pitch. The verb tells you about something that is going to happen.
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Based on this information, what is Lyla's genotype for the coat pattern gene?
[ "a black coat", "aa" ]
1
In a group of leopards, some individuals have a spotted coat and others have a black coat. In this group, the gene for the coat pattern trait has two alleles. The allele A is for a spotted coat, and the allele a is for a black coat. Lyla, a leopard from this group, has a black coat. Lyla has two alleles for a black coa...
closed choice
grade7
natural science
biology
Genes to traits
Genetics vocabulary: genotype and phenotype
All organisms have pieces of hereditary material called genes, which are passed from parents to offspring. Genes contain instructions for building the parts of an organism. An organism's genes affect its observable traits, including its appearance, its behavior, and which diseases it may have. Genes may have different ...
An organism's genotype for a gene is its combination of alleles for that gene. Lyla has two alleles for a black coat (a). So, Lyla's genotype for the coat pattern gene is aa.
Which ocean is highlighted?
[ "the Atlantic Ocean", "the Southern Ocean", "the Arctic Ocean", "the Indian Ocean" ]
2
closed choice
grade8
social science
geography
Physical Geography
Oceans and continents
Oceans are huge bodies of salt water. The world has five oceans. All of the oceans are connected, making one world ocean.
This is the Arctic Ocean.
Select the organism in the same genus as the domestic cat.
[ "Felis chaus", "Lynx rufus", "Lynx lynx" ]
0
This organism is a domestic cat. Its scientific name is Felis catus.
closed choice
grade5
natural science
biology
Scientific names
Use scientific names to classify organisms
Scientists use scientific names to identify organisms. Scientific names are made of two words. The first word in an organism's scientific name tells you the organism's genus. A genus is a group of organisms that share many traits. A genus is made up of one or more species. A species is a group of very similar organisms...
A domestic cat's scientific name is Felis catus. The first word of its scientific name is Felis. Lynx lynx is in the genus Lynx. The first word of its scientific name is Lynx. So, Lynx lynx and Felis catus are not in the same genus. Lynx rufus is in the genus Lynx. The first word of its scientific name is Lynx. So, Lyn...
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What does the idiom in this text suggest? Mr. and Mrs. Erickson usually see eye to eye, but not when it comes to the controversial mayoral race.
[ "Mr. and Mrs. Erickson usually agree.", "Mr. and Mrs. Erickson are not politically active." ]
0
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 idiom is an expression that cannot be understood literally. Its meaning must be learned. The assignment was a piece of cake.
The text uses an idiom, an expression that cannot be understood literally. The idiom see eye to eye suggests that Mr. and Mrs. Erickson usually agree. When you see eye to eye with someone, you share their opinion.
Based on the maps above, what was true about the Southern Colonies compared to the other colonies?
[ "The Southern Colonies had better soil than New England.", "The Southern Colonies had worse soil than New England.", "The Southern Colonies had a shorter growing season than the Middle Colonies." ]
0
The two maps below give information about the colonial regions of North America. The first map shows how good the soil was for growing crops. The second map shows how many months out of the year had good weather for growing crops. Look at the maps. Then answer the question below.
closed choice
grade5
social science
us-history
English colonies in North America
Southern colonies: economy and slavery
Look at the maps. These choices are correct: The Southern Colonies had better soil than New England. In the first map, most of the soil in the Southern Colonies is labeled "most fertile." Meanwhile, New England is labeled as "least fertile." Fertile soil is good for growing crops. So, the Southern colonies had better,...
What can Logan and Vicky trade to each get what they want?
[ "Vicky can trade her broccoli for Logan's oranges.", "Logan can trade his tomatoes for Vicky's broccoli.", "Vicky can trade her almonds for Logan's tomatoes.", "Logan can trade his tomatoes for Vicky'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. Logan and Vicky open their lunch boxes in the school cafeteria. Neither Logan nor Vicky got everything that they wanted. The tabl...
closed choice
grade8
social science
economics
Basic economic principles
Trade and specialization
Look at the table and images. Logan wants broccoli. Vicky 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.
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Select the place that doesn't belong.
[ "hive", "moon", "den", "nest" ]
1
closed choice
grade3
language science
vocabulary
Categories
Select the words that don't belong
Moon doesn't belong. Nest, hive, and den all name places where groups of animals live.
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Which is a run-on sentence?
[ "All fish use gills for breathing underwater.", "Grandpa teaches us how to play the fiddle it isn't easy." ]
1
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...
Grandpa teaches us how to play the fiddle it isn't easy is a run-on sentence. It has two sentences that are joined without end punctuation: Grandpa teaches us how to play the fiddle and It isn't easy.
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Which figure of speech is used in this text? The metal platter landed with a great clang, spraying bits of food across the kitchen floor and cabinets.
[ "onomatopoeia", "verbal irony" ]
0
closed choice
grade10
language science
figurative-language
Literary devices
Classify figures of speech: review
Figures of speech are words or phrases that use language in a nonliteral or unusual way. They can make writing more expressive. Alliteration is the repetition of sounds at the beginning of nearby words. What a lucky little lady you are! An allusion is a brief reference to something or someone well known, often from his...
The text uses onomatopoeia, a word that expresses a sound. Clang represents the sound the metal platter made when it hit the floor.
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Is the following trait inherited or acquired? Doug has a scar on his left leg.
[ "inherited", "acquired" ]
1
closed choice
grade5
natural science
biology
Traits and heredity
Identify inherited and acquired traits
Organisms, including people, have both inherited and acquired traits. Inherited and acquired traits are gained in different ways. Inherited traits are passed down through families. Children gain these traits from their parents. Inherited traits do not need to be learned. Acquired traits are gained during a person's lif...
Children do not inherit their parent's scars. Instead, scars are caused by the environment. People can get scars after they get hurt. So, having a scar is an acquired trait.
Which country is highlighted?
[ "the Marshall Islands", "Nauru", "Kiribati", "Solomon Islands" ]
2
closed choice
grade7
social science
geography
Oceania: geography
Identify and select countries of Oceania
This country is Kiribati.
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 south pole of one magnet is closest to the south pole of the other magnet. Like poles repel. So, these magnets will repel each other.
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Which of the following contains a vague pronoun reference?
[ "The jeweler carefully polished the ring once he had removed the precious gemstone from it.", "After the jeweler removed the precious gemstone from the ring, he carefully polished 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 second answer choice contains a vague pronoun reference. The pronoun it could refer to the precious gemstone or the ring. After the jeweler removed the precious gemstone from the ring, he carefully polished it. The first answer choice shows a possible correction for the vague pronoun reference. The text has been re...
Which of the following organisms is the decomposer in this food web?
[ "black crappie", "bacteria", "rotifer" ]
1
Below is a food web from Little Rock Lake, a freshwater lake ecosystem in Wisconsin. 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
grade5
natural science
biology
Ecosystems
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...
Decomposers help break down dead organisms into simpler matter, such as nutrients. These nutrients can then help plants and other organisms grow. In a food web, there is an arrow pointing from another organism to a decomposer. There are no arrows pointing from a decomposer to another organism. The rotifer has arrows po...
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Which of the following contains a vague pronoun reference?
[ "Mike accidentally bumped into the waiter, and food splattered all over Mike's shirt.", "Mike accidentally bumped into the waiter, and food splattered all over his shirt." ]
1
closed choice
grade7
language science
writing-strategies
Pronouns and antecedents
Identify vague pronoun references
When writing, make sure to avoid vague pronoun references. A vague pronoun reference occurs when a pronoun could refer to more than one possible antecedent. When Lisa and Kim finally landed, she breathed a sigh of relief. The pronoun she could refer to either Lisa or Kim, so the meaning of the sentence is unclear. Vagu...
The first answer choice contains a vague pronoun reference. The pronoun his could refer to Mike's or the waiter's. The second answer choice shows a possible correction for the vague pronoun reference. His has been replaced with Mike's. Mike accidentally bumped into the waiter, and food splattered all over Mike's shirt.
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What is the mass of a dinner fork?
[ "85 grams", "85 kilograms" ]
0
Select the better estimate.
closed choice
grade5
natural science
units-and-measurement
Units and measurement
Choose metric units of mass
Measurements are written with both a number and a unit. The unit comes after the number. The unit shows what the number means. Mass is a measurement of how much matter something contains. There are many different units of mass. When you are using metric units, mass may be written with units of grams or kilograms. There...
The better estimate for the mass of a dinner fork is 85 grams. 85 kilograms is too heavy.
Which animal's neck is also adapted for hunting prey while keeping the rest of its body still?
[ "great egret", "northern pintail" ]
0
Great blue herons live near wetlands and lakes. They eat mostly fish. The 's neck helps it grab fish while keeping the rest of its body still. If the heron had to move its body, it might scare the fish away. Figure: great blue heron.
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 neck is one example of an adaptation. Animals' necks can be adapted in different ways. For example, a large frilled neck might help an animal appear dangerous ...
Look at the picture of the great blue heron. The great blue heron has a long neck. Its neck is adapted for hunting prey while keeping the rest of its body still. This allows the great blue heron to grab the prey without scaring it away. Now look at each animal. Figure out which animal has a similar adaptation. The grea...
What can Jamal and Francesca trade to each get what they want?
[ "Jamal can trade his tomatoes for Francesca's carrots.", "Francesca can trade her broccoli for Jamal's oranges.", "Francesca can trade her almonds for Jamal's tomatoes.", "Jamal can trade his tomatoes for Francesca's broccoli." ]
3
Trade happens when people agree to exchange goods and services. People give up something to get something else. Sometimes people barter, or directly exchange one good or service for another. Jamal and Francesca open their lunch boxes in the school cafeteria. Neither Jamal nor Francesca got everything that they wanted. ...
closed choice
grade7
social science
economics
Basic economic principles
Trade and specialization
Look at the table and images. Jamal wants broccoli. Francesca 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.
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Which sentence is more formal?
[ "Andrew Carnegie made tons of dough when he sold his steel company to John Pierpont Morgan in 1901.", "Andrew Carnegie became one of the world's richest men after selling his steel company to John Pierpont Morgan in 1901." ]
1
closed choice
grade7
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 slang (tons of dough). The first sentence uses formal language in place of the slang, so it is more formal overall.
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How long does it take to do ten jumping jacks?
[ "21 minutes", "21 seconds" ]
1
Select the better estimate.
closed choice
grade3
natural science
units-and-measurement
Units and measurement
Choose units of time
Measurements are written with both a number and a unit. The unit comes after the number. The unit shows what the number means. Imagine being told that the bus leaves in 7. You might be thinking, 7 what? Does the bus leave in 7 minutes? 7 seconds? The number 7 on its own does not give you much information about when the...
The better estimate for how long it takes to do ten jumping jacks is 21 seconds. 21 minutes is too slow.
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Complete the statement. Assume that the motorcycle's mass did not change. The gravitational potential energy stored between the motorcycle and Earth () as Josiah rode up the hill.
[ "increased", "stayed the same", "decreased" ]
0
Read the text about an object in motion. Josiah rode his motorcycle from the bottom of a hill to the top of the hill.
closed choice
grade7
natural science
physics
Kinetic and potential energy
Identify changes in gravitational potential energy
Gravitational potential energy is stored between any two objects. So, for every object on or near Earth, there is gravitational potential energy stored between the object and Earth. The amount of gravitational potential energy stored between an object and Earth depends on the mass of the object. The amount of gravitati...
Think about how the distance between the motorcycle and the center of Earth changed. The top of the hill is higher than the bottom of the hill. As Josiah rode toward the top of the hill, the distance between the motorcycle and the center of Earth increased. So, the gravitational potential energy stored between the moto...
Which bird's beak is also adapted to crack large, hard nuts?
[ "hoopoe", "African gray parrot" ]
1
Hyacinth macaws live in the rain forests of South America. They eat large seeds and nuts. The shape of the 's beak is adapted to crack open large, hard nuts. Figure: hyacinth macaw.
closed choice
grade4
natural science
biology
Adaptations
Animal adaptations: beaks, mouths, and necks
An adaptation is an inherited trait that helps an organism survive or reproduce. Adaptations can include both body parts and behaviors. The shape of a bird's beak is one example of an adaptation. Birds' beaks can be adapted in different ways. For example, a sharp hooked beak might help a bird tear through meat easily. ...
Look at the picture of the hyacinth macaw. The hyacinth macaw has a thick hooked beak. Its beak is adapted to crack large, hard nuts. The hyacinth macaw uses its thick beak to crack the shell of a nut by squeezing it. The hooked shape of the beak can help the bird hold the nut in place while cracking it. Now look at ea...
Which property do these three objects have in common?
[ "fuzzy", "bumpy", "yellow" ]
1
Select the best answer.
closed choice
grade3
natural science
physics
Materials
Compare properties of objects
An object has different properties. A property of an object can tell you how it looks, feels, tastes, or smells. Properties can also tell you how an object will behave when something happens to it. Different objects can have properties in common. You can use these properties to put objects into groups.
Look at each object. For each object, decide if it has that property. A bumpy object is covered in lumps and bumps. All three objects are bumpy. Yellow is a color. This color is yellow. The tortoise shell and the pretzel are not yellow. A fuzzy object is covered in soft hair. The tortoise shell and the pineapple are no...
Select the organism in the same genus as the Sasanqua camellia.
[ "Lonicera maackii", "Camellia japonica", "Trametes versicolor" ]
1
This organism is a Sasanqua camellia. Its scientific name is Camellia sasanqua.
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 Sasanqua camellia's scientific name is Camellia sasanqua. The first word of its scientific name is Camellia. Lonicera maackii is in the genus Lonicera. The first word of its scientific name is Lonicera. So, Lonicera maackii and Camellia sasanqua are not in the same genus. Trametes versicolor is in the genus Trametes....
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Which sentence states a fact?
[ "Benjamin Franklin was smarter than most American presidents.", "Benjamin Franklin was never president of the United States." ]
1
closed choice
grade8
social science
civics
Social studies skills
Identify facts and opinions
A fact is something that can be proved true by research or observation. George Washington became president of the United States in 1789. This statement is a fact. It can be proved by researching what year George Washington was inaugurated president. An opinion is something that a person believes, thinks, or feels. An o...
The first sentence states a fact. Benjamin Franklin was never president of the United States. It can be proved by looking at a list of U.S. presidents. The second sentence states an opinion. Benjamin Franklin was smarter than most American presidents. Smarter shows what a person believes, thinks, or feels. Another pers...
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What do these two changes have in common? a crayon melting in the sun a puddle freezing into ice on a cold night
[ "Both are caused by cooling.", "Both are only physical changes.", "Both are chemical changes.", "Both are caused by heating." ]
1
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 crayon melting in the sun is a change of state. So, it is a physical change. The crayon changes state from solid to liquid. The crayon is still made of wax, even after it melts. A puddle freezing into ice on a cold night is a change of state. So, it is a physical change. Liquid water ...
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Using only these supplies, which question can Dana investigate with an experiment?
[ "Do round rocks or flat rocks skip more times when thrown across the river?", "Do small rocks or large rocks skip more times when thrown across the river?", "Do rocks skip more times when thrown across a river or across a pond?" ]
1
Dana likes to skip rocks at the river. She notices that some of the rocks she throws skip off the surface of the water many times, while others skip once and then sink. She wonders what factors affect how well rocks skip on the water. So, she decides to design an experiment. She has the following supplies available: 10...
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...
Which animal's feet are also adapted for digging?
[ "Weddell seal", "six-banded armadillo" ]
1
s are found in parts of Europe. They dig and live in burrows. The feet of the are adapted for digging. Figure: Alpine marmot.
closed choice
grade3
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. The shape of an animal's feet is one example of an adaptation. Animals' feet can be adapted in different ways. For example, webbed feet might help an animal swim. Feet with thick fur m...
Look at the picture of the Alpine marmot. The Alpine marmot has long, straight claws. Its feet are adapted for digging. The Alpine marmot uses its claws to break up soil and move it out of the way. Now look at each animal. Figure out which animal has a similar adaptation. The six-banded armadillo has long, straight cla...
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What is the mass of an eraser?
[ "42 grams", "42 kilograms" ]
0
Select the better estimate.
closed choice
grade5
natural science
units-and-measurement
Units and measurement
Choose metric units of mass
Measurements are written with both a number and a unit. The unit comes after the number. The unit shows what the number means. Mass is a measurement of how much matter something contains. There are many different units of mass. When you are using metric units, mass may be written with units of grams or kilograms. There...
The better estimate for the mass of an eraser is 42 grams. 42 kilograms is too heavy.
Which animal's skin is better adapted for protection against a predator with sharp teeth?
[ "ground pangolin", "collared dove" ]
0
Southern three-banded armadillos are adapted to defend their bodies against a predator with sharp teeth. They have hard scales covering much of their skin. When frightened, the can roll into a ball to protect the soft parts of its body. Figure: southern three-banded armadillo.
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 southern three-banded armadillo. The southern three-banded armadillo has hard scales on its skin. Its skin is adapted for protection against a predator with sharp teeth. The scales make it difficult for predators to hurt or kill the southern three-banded armadillo. Now look at each animal. Fi...
Based on the continuum scale, which blood type is most common?
[ "O+", "AB-" ]
0
This continuum scale shows how common different blood types are.
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...
A continuum scale compares things by ordering them along a line. This continuum scale shows how common different blood types are. Less common blood types are shown to the left. More common blood types are shown to the right. O+ is shown farther right than any other blood type. So, the most common blood type is O+.
Which material is this box made of?
[ "clay", "metal" ]
1
closed choice
grade2
natural science
physics
Materials
Identify multiple materials in objects
A material is a type of matter. Wood, glass, metal, and plastic are common materials. Some objects are made of just one material. Most nails are made of metal. Other objects are made of more than one material. This hammer is made of metal and wood.
Look at the picture of the box. The jewelry box is made of two different materials. The box is made of wood, and the hinges are metal.
What is the capital of Oregon?
[ "Salem", "Helena", "Knoxville", "Honolulu" ]
0
closed choice
grade5
social science
geography
State capitals
Identify the 50 state capitals
Salem is the capital of Oregon.
Based on the time line, when did people start playing polo?
[ "before surfing", "before sumo wrestling" ]
1
This time line shows ancient sports that are still popular today. It gives each sport's likely place and date of origin.
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...
A time line shows the order of events by placing them along a line. This time line shows ancient sports that are still popular today. It gives each sport's likely place and date of origin. Look at how the events are ordered on the time line. Sports that were invented earlier are shown to the left. Sports that were inve...
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Which logical fallacy is used in the text? I ate kielbasa right before my favorite football team won the championship back in 2006. Now, I always eat kielbasa before their games to carry them to victory.
[ "circular reasoning: an argument that supports a claim with the claim itself", "false causation: the assumption that because two things happened together, one caused the other" ]
1
closed choice
grade6
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 eating kielbasa before games makes the team win. However, even though the writer ate kielbasa before his or her team won in 2006, that doesn't necessarily mean that the kielbasa was responsible for the team's success. This illustrates a type of logical fallacy known as false causation.
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Which would stretch more?
[ "rubber ballon", "steel beam" ]
0
closed choice
grade3
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 rubber ballon would stretch more. If you gently pull on a rubber balloon, it will get longer.
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What is the source of the allusion in the sentence below? When I learned the details of Kiera's Faustian bargain, I was in disbelief.
[ "Roman mythology", "literature" ]
1
closed choice
grade7
language science
figurative-language
Literary devices
Recall the source of an allusion
An allusion is a brief mention of something or someone well known, often from mythology, history, or literature. An allusion lets you reference ideas from an entire story in just a few words. "I'd better get home before I turn into a pumpkin!" Lila remarked. Here, Lila alludes to the fairy tale "Cinderella," in which C...
The source of the allusion Faustian bargain is literature. In a play by Christopher Marlowe based on the legend of Faust, a man strikes a deal with the devil. Disregarding the long-term consequences of his actions, he sells his soul in exchange for power. The allusion Faustian bargain means a compromise of one's values...
Is a spoon a solid, a liquid, or a gas?
[ "a gas", "a liquid", "a solid" ]
2
closed choice
grade2
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 shape of its own. Some solids can be bent or broken easily. Others are hard to bend or break. A glass cup is a solid. A sock is also a solid. When matter i...
A spoon is a solid. You can bend a spoon. But it will still have a size and shape of its own.
What is the probability that a Syrian hamster produced by this cross will be heterozygous for the fur length gene?
[ "4/4", "3/4", "0/4", "1/4", "2/4" ]
4
In a group of Syrian hamsters, some individuals have short fur and others have long fur. In this group, the gene for the fur length trait has two alleles. The allele for long fur (f) is recessive to the allele for short fur (F). This Punnett square shows a cross between two Syrian hamsters.
closed choice
grade8
natural science
biology
Genes to traits
Use Punnett squares to calculate probabilities of offspring types
Offspring genotypes: homozygous or heterozygous? How do you determine whether an organism is homozygous or heterozygous for a gene? Look at the alleles in the organism's genotype for that gene. An organism with two identical alleles for a gene is homozygous for that gene. If both alleles are dominant, the organism is h...
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The movers lift the boxes at the same speed. Which box is lifted with a larger force?
[ "a box holding 21 pounds", "a box holding 31 pounds" ]
1
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 31 pounds is heavier than a box holding 21 pounds. So, the box holding 31 pounds needs a larger force to start moving upward at the same speed as the other box.
Which property do these three objects have in common?
[ "smooth", "scratchy", "sticky" ]
0
Select the best answer.
closed choice
grade4
natural science
physics
Materials
Compare properties of objects
An object has different properties. A property of an object can tell you how it looks, feels, tastes, or smells. Properties can also tell you how an object will behave when something happens to it. Different objects can have properties in common. You can use these properties to put objects into groups. Grouping objects...
Look at each object. For each object, decide if it has that property. A scratchy object is rough and itchy against your skin. None of the objects are scratchy. A smooth object is not scratchy or rough. All three objects are smooth. A sticky object can attach or stick to other things. None of the objects are sticky. The...
Select the organism in the same genus as the Victoria crowned pigeon.
[ "Larus livens", "Goura cristata", "Cyanocitta stelleri" ]
1
This organism is a Victoria crowned pigeon. Its scientific name is Goura victoria.
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 Victoria crowned pigeon's scientific name is Goura victoria. The first word of its scientific name is Goura. Goura cristata is in the genus Goura. The first word of its scientific name is Goura. So, Goura cristata and Goura victoria are in the same genus. Larus livens is in the genus Larus. The first word of its scie...
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Which figure of speech is used in this text? Juan's room is as tidy as an overgrown garden.
[ "onomatopoeia", "verbal irony" ]
1
closed choice
grade10
language science
figurative-language
Literary devices
Classify figures of speech: review
Figures of speech are words or phrases that use language in a nonliteral or unusual way. They can make writing more expressive. Alliteration is the repetition of sounds at the beginning of nearby words. What a lucky little lady you are! An allusion is a brief reference to something or someone well known, often from his...
The text uses verbal irony, which involves saying one thing but implying something very different. As tidy as an overgrown garden shows verbal irony because an overgrown garden is not tidy.
What is the name of the colony shown?
[ "New Jersey", "Pennsylvania", "Delaware", "Connecticut" ]
3
closed choice
grade7
social science
us-history
Colonial America
Identify the Thirteen Colonies
The colony is Connecticut.
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Which tense does the sentence use? Circus clowns amuse the young children.
[ "future tense", "present tense", "past tense" ]
1
closed choice
grade3
language science
verbs
Verb tense
Is the sentence in the past, present, or future tense?
Present tense verbs tell you about something that is happening now. Most present-tense verbs are regular. They have no ending, or they end in -s or -es. Two verbs are irregular in the present tense, to be and to have. You must remember their forms. Past tense verbs tell you about something that has already happened. Mo...
The sentence is in present tense. You can tell because it uses a present-tense verb, amuse. The verb tells you about something that is true or happening now.
According to the timeline, during which historical period did the U.S.-Mexican War occur?
[ "the early republic period", "the Civil War period", "the antebellum period" ]
2
In the following questions, you will learn about the U.S.-Mexican War (1846–1848), sometimes called the Mexican-American War. You will learn about what caused the war, how it was fought, and what happened after the war was over. The following timeline shows the U.S.-Mexican War and some other historical events that too...
closed choice
grade8
social science
us-history
The Antebellum period
The U.S.-Mexican War
Look at the timeline. Find the box that shows the U.S.-Mexican War. Look at the color of that box, and then look at the legend. According to the legend, the U.S.-Mexican War took place during the antebellum period. Why is it called the antebellum period? In Latin, the word ante means "before," and the word bellum means...
Complete the statement. Fluoromethane is ().
[ "a compound", "an elementary substance" ]
0
The model below represents a molecule of fluoromethane. Fluoromethane can be used in the part of a refrigerator that keeps the temperature low.
closed choice
grade5
natural science
chemistry
Atoms and molecules
Classify elementary substances and compounds using models
All substances are made of one or more chemical elements, or types of atoms. Substances that are made of only one chemical element are elementary substances. Substances that are made of two or more chemical elements bonded together are compounds. Every chemical element is represented by its own symbol. For some element...
Count the number of chemical elements represented in the model. Then, decide if fluoromethane is an elementary substance or a compound. In this model, each ball is labeled with C for carbon, H for hydrogen, or F for fluorine. So, the model shows you that fluoromethane is made of three chemical elements bonded together....
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Is the following trait inherited or acquired? Stefan can play the clarinet.
[ "acquired", "inherited" ]
0
closed choice
grade5
natural science
biology
Traits and heredity
Identify inherited and acquired traits
Organisms, including people, have both inherited and acquired traits. Inherited and acquired traits are gained in different ways. Inherited traits are passed down through families. Children gain these traits from their parents. Inherited traits do not need to be learned. Acquired traits are gained during a person's lif...
People are not born knowing how to play the clarinet. Instead, some people learn how to play. So, playing the clarinet is an acquired trait.
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Which closing is correct for a letter?
[ "thanks,\nWendy", "Thanks,\nWendy" ]
1
closed choice
grade3
language science
punctuation
Formatting
Greetings and closings of letters
A letter starts with a greeting and ends with a closing. For each one, capitalize the first word and end with a comma. You should also capitalize proper nouns, such as Aunt Sue. Dear Aunt Sue, I'm glad you could come to my party, and thank you for the birthday gift. I could not have asked for a better one! Every time I...
The second closing is correct: Its first word is capitalized, and it ends with a comma.
Which animal is also adapted to be camouflaged in a sandy desert?
[ "horned viper", "Amazon milk frog" ]
0
Flat-tail horned lizards live in the deserts of North America. The is adapted to be camouflaged in a sandy desert. Figure: flat-tail horned lizard.
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 flat-tail horned lizard. The flat-tail horned lizard 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 horned viper has sand-colore...
What is the capital of Montana?
[ "Juneau", "Saint Paul", "Honolulu", "Helena" ]
3
closed choice
grade5
social science
geography
State capitals
Identify the 50 state capitals
Helena is the capital of Montana.
Will these magnets attract or repel each other?
[ "attract", "repel" ]
0
Two magnets are placed as shown. Hint: Magnets that attract pull together. Magnets that repel push apart.
closed choice
grade2
natural science
physics
Magnets
Identify magnets that attract or repel
Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart. Whether a magnet attracts or repels other magnets depends on the positions of its poles, or ends. Every magnet has two poles, called north and south. Here are some examples of magnets....
Will these magnets attract or repel? To find out, look at which poles are closest to each other. The south pole of one magnet is closest to the north pole of the other magnet. Poles that are different attract. So, these magnets will attract each other.
Is the following statement about our solar system true or false? The largest planet is made mainly of ice.
[ "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 planet is the largest, look at the volumes shown in the table and compare the exponents. Jupiter's volume has an exponent of 15, which is the largest out of all the planets. Jupiter is made mainly of gas. So, the largest planet is made mainly of gas.
Which specific humidity level was measured within the outlined area shown?
[ "5 grams of water vapor per kilogram of air", "9 grams of water vapor per kilogram of air", "14 grams of water vapor per kilogram of air" ]
0
The map below shows humidity in the lower atmosphere on May 3, 2013. The map shows specific humidity, a measurement of the amount of water vapor in the air. The outlined area shows an air mass that influenced weather in North America on that day. Look at the map. Then, answer the question below. Data source: United Sta...
closed choice
grade7
natural science
earth-science
Weather and climate
Identify and compare air masses
To study air masses, scientists can use maps that show conditions within Earth's atmosphere. For example, the map below uses color to show specific humidity, a measurement of the amount of water vapor in the air. The map's legend tells you the specific humidity level that each color represents. Colors on the left in th...
Look at the colors shown within the outlined area. Then, use the legend to determine which specific humidity levels those colors represent. The legend tells you that this air mass contained air with specific humidity levels between 0 and 6 grams of water vapor per kilogram of air. 5 grams of water vapor per kilogram of...
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Which closing is correct for a letter?
[ "Yours truly,\nKurt", "Yours Truly,\nKurt" ]
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.
Identify the question that Cole's experiment can best answer.
[ "Do more bacteria grow in liquid with cinnamon than in liquid without cinnamon?", "Does temperature affect how much bacteria can grow in liquid?" ]
0
The passage below describes an experiment. Read the passage and then follow the instructions below. Cole mixed bacteria into a nutrient-rich liquid where the bacteria could grow. He poured four ounces of the mixture into each of ten glass flasks. In five of the ten flasks, he also added one teaspoon of cinnamon. He al...
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...
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Does this passage describe the weather or the climate? Where Jon lives, the wind often blows in from the nearby hills.
[ "weather", "climate" ]
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. Where Jon lives, the wind often blows in from the nearby hills. This passage tells you about the usual wind pattern where Jon lives. It does not describe what the weather is like on a particular day. So, this passage describes the climate.
Select the reptile below.
[ "helmeted iguana", "fruit bat" ]
0
Reptiles have scaly, waterproof skin. Most reptiles live on land. A Chinese alligator is an example of a reptile.
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 fruit bat is a mammal. It has hair and feeds its young milk. A helmeted iguana is a reptile. It has scaly, waterproof skin.
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What is the source of the allusion in the sentence below? Looking at his life, we couldn't help but see Pablo as a Job-like figure.
[ "the Bible", "Greek mythology" ]
0
closed choice
grade11
language science
figurative-language
Literary devices
Recall the source of an allusion
An allusion is a brief mention of something or someone well known, often from mythology, history, or literature. An allusion lets you reference ideas from an entire story in just a few words. The protean nature of the disease makes it difficult to diagnose. The word protean is an allusion to the sea god Proteus in Gree...
The source of the allusion Job is the Bible. In the Bible, Job remains faithful and loyal to God, even after the unjust loss of his possessions, family, and health. The allusion Job means someone who patiently endures adversity.