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	Which property do these two objects have in common?	[ "slippery", "salty" ]	1	Select the better answer.	closed choice	grade2	natural science	physics	Materials	Compare properties of objects	An object has different properties. A property of an object can tell you how it looks, feels, tastes, or smells. Different objects can have the same properties. You can use these properties to put objects into groups.	Look at each object. For each object, decide if it has that property. Potato chips have a salty taste. Both objects are salty. A slippery object is hard to hold onto or stand on. The cracker is not slippery. The property that both objects have in common is salty.
	Which of these states is farthest east?	[ "Indiana", "Texas", "Kansas", "Georgia" ]	3		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 east arrow is pointing. Georgia is farthest east.
Not supported with pagination yet	What kind of sentence is this? Why are Chase and Haley arguing?	[ "interrogative", "exclamatory" ]	0		closed choice	grade4	language science	punctuation	Sentences, fragments, and run-ons	Is the sentence declarative, interrogative, imperative, or exclamatory?	There are four kinds of sentences. A declarative sentence is a statement. It tells about something. A declarative sentence always ends with a period. I have an older brother and a younger sister. An interrogative sentence is a question. It asks something. An interrogative sentence always ends with a question mark. How ...	The sentence asks something, and it ends with a question mark. It is an interrogative sentence.
	Is the following statement about our solar system true or false? The volume of Mars is more than three times as large as Mercury's.	[ "true", "false" ]	1	Use the data to answer the question below.	true-or false	grade6	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.	To determine if this statement is true, calculate the value of three times the volume of Mercury. Then compare the result to the volume of Mars. The volume of Mars is 160 billion km^3, which is less than 180 billion km^3. So, the volume of Mars is less than three times as large as Mercury's.
	Which property matches this object?	[ "breakable", "bumpy" ]	0	Select the better answer.	closed choice	grade2	natural science	physics	Materials	Identify properties of an object	An object has different properties. A property of an object can tell you how it looks, feels, tastes, or smells.	Look at the object. Think about each property. A bumpy object is covered in lumps and bumps. The fish bowl is not bumpy. A breakable object will break into pieces if you drop it. The fish bowl is breakable.
Not supported with pagination yet	Which is the scratchiest?	[ "sandpaper", "rubber balloons", "ceramic tea 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...	Scratchy is a property. A scratchy material is rough and itchy against your skin. Look at each picture, one at a time. Imagine touching the material shown in each picture. Of the choices, the sandpaper is the scratchiest. If you touch a piece of sandpaper, it will feel rough and itchy.
	Which property do these three objects have in common?	[ "blue", "sticky", "transparent" ]	0	Select the best answer.	closed choice	grade3	natural science	physics	Materials	Compare properties of objects	An object has different properties. A property of an object can tell you how it looks, feels, tastes, or smells. Properties can also tell you how an object will behave when something happens to it. Different objects can have properties in common. You can use these properties to put objects into groups.	Look at each object. For each object, decide if it has that property. A sticky object can attach or stick to other things. The soccer shorts and the sapphire are not sticky. You can see clearly through a transparent object. The soccer shorts and the blueberry are not transparent. Blue is a color. This color is blue. Al...
Not supported with pagination yet	Compare the motion of three speedboats. Which speedboat was moving at the lowest speed?	[ "a speedboat that moved 310kilometers west in 5hours", "a speedboat that moved 380kilometers east in 5hours", "a speedboat that moved 415kilometers west in 5hours" ]	0		closed choice	grade3	natural science	physics	Force and motion	Compare the speeds of moving objects	An object's speed tells you how fast the object is moving. Speed depends on both distance and time. Distance tells you how far the object has moved. One unit used to measure distance is the kilometer. Time tells you how long the object has spent moving. One unit used to measure time is the hour. Think about objects mov...	Look at the distance each speedboat moved and the time it took to move that distance. The direction each speedboat moved does not affect its speed. Notice that each speedboat moved for 5 hours. The speedboat that moved 310 kilometers moved the shortest distance in that time. So, that speedboat must have moved at the lo...
	Is soap a mineral?	[ "no", "yes" ]	0	Soap has the following properties: not a pure substance no fixed crystal structure made in a factory solid	yes or no	grade6	natural science	earth-science	Rocks and minerals	Identify rocks and minerals	Properties are used to identify different substances. Minerals have the following properties: It is a solid. It is formed in nature. It is not made by organisms. It is a pure substance. It has a fixed crystal structure. If a substance has all five of these properties, then it is a mineral. Look closely at the last thre...	Soap does not have all the properties of a mineral. So, soap is not a mineral.
	Which of the following could Samantha and Justine's test show?	[ "if the concrete from each batch took the same amount of time to dry", "if a new batch of concrete was firm enough to use" ]	1	People can use the engineering-design process to develop solutions to problems. One step in the process is testing if a potential solution meets the requirements of the design. The passage below describes how the engineering-design process was used to test a solution to a problem. Read the passage. Then answer the ques...	closed choice	grade6	natural science	science-and-engineering-practices	Engineering practices	Evaluate tests of engineering-design solutions	People can use the engineering-design process to develop solutions to problems. One step in the process is testing if a potential solution meets the requirements of the design. How can you determine what a test can show? You need to figure out what was tested and what was measured. Imagine an engineer needs to design a...
Not supported with pagination yet	Is the following trait inherited or acquired? Keith has five fingers on each hand.	[ "inherited", "acquired" ]	0		closed choice	grade5	natural science	biology	Traits and heredity	Identify inherited and acquired traits	Organisms, including people, have both inherited and acquired traits. Inherited and acquired traits are gained in different ways. Inherited traits are passed down through families. Children gain these traits from their parents. Inherited traits do not need to be learned. Acquired traits are gained during a person's lif...	Most humans are born with five fingers on each hand. So, having five fingers is an inherited trait.
	Which continent is highlighted?	[ "South America", "Antarctica", "Australia", "Europe" ]	2		closed choice	grade5	social science	geography	Oceans and continents	Identify oceans and continents	A continent is one of the major land masses on the earth. Most people say there are seven continents.	This continent is Australia.
	Which solution has a higher concentration of green particles?	[ "neither; their concentrations are the same", "Solution B", "Solution A" ]	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...
	Which of the following could Darren's test show?	[ "the amount of bacteria in the water before it was filtered", "whether an inexpensive filter would become clogged more often", "whether the filter was clogged" ]	2	People can use the engineering-design process to develop solutions to problems. One step in the process is testing if a potential solution meets the requirements of the design. The passage below describes how the engineering-design process was used to test a solution to a problem. Read the passage. Then answer the ques...	closed choice	grade8	natural science	science-and-engineering-practices	Engineering practices	Evaluate tests of engineering-design solutions	People can use the engineering-design process to develop solutions to problems. One step in the process is testing if a potential solution meets the requirements of the design. How can you determine what a test can show? You need to figure out what was tested and what was measured. Imagine an engineer needs to design a...
Not supported with pagination yet	Which ping pong ball has less thermal energy?	[ "the hotter ping pong ball", "the colder ping pong ball" ]	1	Two ping pong balls are identical except for their temperatures.	closed choice	grade6	natural science	physics	Thermal energy	How are temperature and mass related to thermal energy?	Matter is made of tiny particles called atoms. Atoms are always moving. The energy of moving atoms is called thermal energy. The total amount of thermal energy in matter depends on three things: the type of matter, the amount of matter, and how fast the atoms are moving. Temperature measures how hot or cold matter is. ...	The two ping pong balls are made of the same material and have the same mass. So, the colder ping pong ball has less thermal energy.
Not supported with pagination yet	What is the source of the allusion in the sentence below? Krysta was known among her coworkers for her spartan ways.	[ "the Bible", "Greek history" ]	1		closed choice	grade11	language science	figurative-language	Literary devices	Recall the source of an allusion	An allusion is a brief mention of something or someone well known, often from mythology, history, or literature. An allusion lets you reference ideas from an entire story in just a few words. The protean nature of the disease makes it difficult to diagnose. The word protean is an allusion to the sea god Proteus in Gree...	The source of the allusion spartan is Greek history. Soldiers from the city of Sparta in ancient Greece were known for their self-restraint, self-discipline, and indifference to luxury. The allusion spartan means simple and austere.
	What is the capital of Virginia?	[ "Tulsa", "Bridgeport", "Atlanta", "Richmond" ]	3		closed choice	grade4	social science	geography	State capitals	Identify state capitals of the Southeast		Richmond is the capital of Virginia.
	What is the capital of North Carolina?	[ "Tulsa", "Birmingham", "Charleston", "Raleigh" ]	3		closed choice	grade4	social science	geography	State capitals	Identify state capitals of the Southeast		Raleigh is the capital of North Carolina.
	What is the capital of Wyoming?	[ "Augusta", "Cheyenne", "Montgomery", "Columbia" ]	1		closed choice	grade3	social science	geography	State capitals	Identify state capitals of the West		Cheyenne is the capital of Wyoming.
	Which country is highlighted?	[ "the Dominican Republic", "Dominica", "Grenada", "Haiti" ]	1		closed choice	grade8	social science	geography	The Americas: geography	Identify and select countries of the Caribbean		This country is Dominica.
Not supported with pagination yet	What kind of sentence is this? Do you know Santiago from soccer camp, or do you have another connection with him?	[ "imperative", "interrogative", "exclamatory" ]	1		closed choice	grade7	language science	punctuation	Sentences, fragments, and run-ons	Is the sentence declarative, interrogative, imperative, or exclamatory?	There are four kinds of sentences. A declarative sentence is a statement, and it always ends with a period. The nurse told Mr. Abrams to roll up his sleeve so that she could check his blood pressure. An interrogative sentence is a question, and it always ends with a question mark. Do you have any plans for the upcoming...	The sentence asks something, and it ends with a question mark. It is an interrogative sentence.
	Which property do these three objects have in common?	[ "scratchy", "flexible", "fragile" ]	2	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 flexible object can be folded or bent without breaking easily. None of the objects are flexible. A scratchy object is rough and itchy against your skin. None of the objects are scratchy. A fragile object will break into pieces if you drop it. All t...
	Which country is highlighted?	[ "Saint Lucia", "Jamaica", "Antigua and Barbuda", "Saint Kitts and Nevis" ]	3		closed choice	grade6	social science	geography	The Americas: geography	Identify and select countries of the Caribbean		This country is Saint Kitts and Nevis.
	What is the name of the colony shown?	[ "West Virginia", "Illinois", "Massachusetts", "Georgia" ]	2		closed choice	grade8	social science	us-history	Colonial America	Identify the Thirteen Colonies		The colony is Massachusetts. The Massachusetts Colony included land that would later become the state of Maine. Maine was never its own colony.
Not supported with pagination yet	Which logical fallacy is used in the text? None of my grandparents know how to connect a printer to their computers. Why are older adults so bad with technology?	[ "appeal to nature: the assumption that natural things are always good", "circular reasoning: an argument that supports a claim with the claim itself", "hasty generalization: a broad claim based on too few observations" ]	2		closed choice	grade9	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 all older adults are bad with technology because the speaker's grandparents are. However, just because a few older adults are bad with technology, it doesn't mean that all older adults are. This illustrates a type of logical fallacy known as a hasty generalization.
	Which property matches this object?	[ "scratchy", "sour" ]	1	Select the better answer.	closed choice	grade2	natural science	physics	Materials	Identify properties of an object	An object has different properties. A property of an object can tell you how it looks, feels, tastes, or smells.	Look at the object. Think about each property. A scratchy object is rough and itchy against your skin. The lime is not scratchy. A lemon has a sour taste. The lime is sour.
Not supported with pagination yet	Is the following trait inherited or acquired? Ben plays baseball.	[ "inherited", "acquired" ]	1	Hint: Playing baseball takes practice.	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...	People are not born knowing how to play baseball. Instead, some people learn how to play baseball. Playing the sport takes practice. So, playing baseball is an acquired trait.
Not supported with pagination yet	Which word would you find on a dictionary page with the following guide words? divide - draw	[ "doe", "decorate" ]	0		closed choice	grade3	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 doe is between the guide words divide - draw, it would be found on that page.
Not supported with pagination yet	Which word would you find on a dictionary page with the following guide words? weary - win	[ "wonder", "whale" ]	1		closed choice	grade3	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 whale is between the guide words weary - win, it would be found on that page.
Not supported with pagination yet	Select the vertebrate.	[ "squirrel", "saturn butterfly" ]	0	Hint: Mammals, birds, fish, reptiles, and amphibians are vertebrates.	closed choice	grade3	natural science	biology	Classification	Identify vertebrates and invertebrates	Vertebrates and invertebrates are both groups of animals. A vertebrate has a backbone. The backbone is made of many bones in an animal's back. A vertebrate's backbone helps connect the different parts of its body. In the drawings below, each vertebrate's backbone is colored orange. An invertebrate does not have a backb...	A saturn butterfly is an insect. Like other insects, a saturn butterfly is an invertebrate. It does not have a backbone. It has a hard outer cover. A squirrel is a mammal. Like other mammals, a squirrel is a vertebrate. It has a backbone.
	What is the capital of Maryland?	[ "Concord", "Annapolis", "Minneapolis", "Baltimore" ]	1		closed choice	grade4	social science	geography	State capitals	Identify state capitals of the Northeast		Annapolis is the capital of Maryland.
Not supported with pagination yet	Using only these supplies, which question can Rosanne investigate with an experiment?	[ "Does the basketball bounce higher on a lawn or on a dirt path?", "Does the basketball bounce higher on gravel or on grass?", "Do larger basketballs bounce higher than smaller basketballs on a brick patio?" ]	1	Rosanne 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 ...	closed choice	grade7	natural science	science-and-engineering-practices	Designing experiments	Identify questions that can be investigated with a set of materials	Experiments can be designed to answer specific questions. When designing an experiment, you must identify the supplies that are necessary to answer your question. In order to do this, you need to figure out what will be tested and what will be measured during the experiment. Imagine that you are wondering if plants gro...
Not supported with pagination yet	What information supports the conclusion that Jeremiah acquired this trait?	[ "Jeremiah learned biology by reading, observing, and experimenting.", "Jeremiah is most interested in human biology." ]	0	Read the description of a trait. Jeremiah 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...
Not supported with pagination yet	Would you find the word rig on a dictionary page with the following guide words? rag - result	[ "yes", "no" ]	1		yes or no	grade6	language science	reference-skills	Reference skills	Use guide words	Guide words appear on each page of a dictionary. They tell you the first word and last word on the page. The other words on the page come between the guide words in alphabetical order. To put words in alphabetical order, put them in order by their first letters. If the first letters are the same, look at the second let...	Put the words in alphabetical order. Since rig is not between the guide words rag - result, it would not be found on that page.
Not supported with pagination yet	What is the text's most likely purpose?	[ "to persuade", "to entertain", "to inform" ]	1	Read the text below. The men looked over the edge of the cliff. "How in the world are we going to get down there?" one asked.	closed choice	grade4	language science	writing-strategies	Author's purpose	Identify the purpose of a text	Authors write texts for different purposes, or reasons. Common purposes for writing are to persuade, to inform, or to entertain readers. Authors persuade by convincing readers to believe or do something. An advertisement tries to convince readers to buy a product. A political poster tries to convince readers to vote fo...	The text is a part of a story. Its purpose is to entertain.
Not supported with pagination yet	What is the mass of a dinner fork?	[ "70 grams", "70 kilograms" ]	0	Select the better estimate.	closed choice	grade4	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 70 grams. 70 kilograms is too heavy.
	What is the capital of Montana?	[ "Helena", "Orlando", "Bismarck", "Billings" ]	0		closed choice	grade3	social science	geography	State capitals	Identify the 50 state capitals		Helena is the capital of Montana.
	Will these magnets attract or repel each other?	[ "repel", "attract" ]	1	Two magnets are placed as shown.	closed choice	grade5	natural science	physics	Magnets	Identify magnets that attract or repel	Magnets can pull or push on other magnets without touching them. When magnets attract, they pull together. When magnets repel, they push apart. These pulls and pushes are called magnetic forces. Magnetic forces are strongest at the magnets' poles, or ends. Every magnet has two poles: a north pole (N) and a south pole (...	To predict if these magnets will attract or repel, look at which poles are closest to each other. The south pole of one magnet is closest to the north pole of the other magnet. Opposite poles attract. So, these magnets will attract each other.
Not supported with pagination yet	Which of the following contains a vague pronoun reference?	[ "Molly looks almost identical to her twin sister Julia, but she has pierced ears.", "Molly has pierced ears, but otherwise she looks almost identical to her twin sister Julia." ]	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 Molly or Julia. Molly looks almost identical to her twin sister Julia, but she has pierced ears. The second answer choice shows a possible correction for the vague pronoun reference. The text has been rewritten so that the meanin...
	What is the capital of Oregon?	[ "Burlington", "Salem", "Denver", "Jackson" ]	1		closed choice	grade5	social science	geography	State capitals	Identify state capitals of the West		Salem is the capital of Oregon.
	Which country is highlighted?	[ "Barbados", "the Dominican Republic", "Saint Lucia", "Saint Vincent and the Grenadines" ]	0		closed choice	grade7	social science	geography	The Americas: geography	Identify and select countries of the Caribbean		This country is Barbados.
Not supported with pagination yet	Which body part pulls on bones to move the body?	[ "muscles", "heart", "stomach" ]	0		closed choice	grade2	natural science	biology	Animals	Body parts and their functions
Not supported with pagination yet	What is the temperature of a cool glass of milk?	[ "55°C", "55°F" ]	1	Select the better estimate.	closed choice	grade6	natural science	units-and-measurement	Units and measurement	Estimate temperatures	Measurements are written with both a number and a unit. The unit comes after the number. The unit shows what the number means. Temperature can be written with units of degrees Fahrenheit (°F) or Celsius (°C). Use the list below to compare the two units. 212°F \| Water boils \| 100°C 98.6°F \| Body temperature \| 37°C 68°F ...	The better estimate for the temperature of a cool glass of milk is 55°F. 55°C is too hot.
	Which property do these four objects have in common?	[ "rough", "shiny", "slippery" ]	1	Select the best answer.	closed choice	grade5	natural science	physics	Materials	Compare properties of objects	An object has different properties. A property of an object can tell you how it looks, feels, tastes, or smells. Properties can also tell you how an object will behave when something happens to it. Different objects can have properties in common. You can use these properties to put objects into groups. Grouping objects...	Look at each object. For each object, decide if it has that property. A slippery object is hard to hold onto or stand on. The gold nugget is not slippery. A rough object feels scratchy when you touch it. The metal bar, the crown, and the bracelet are not rough. A shiny object reflects a lot of light. You can usually se...
	Which i in column 2?	[ "the restaurant", "the park", "the library", "the grocery store" ]	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 library is in column 2.
Not supported with pagination yet	Select the one substance that is not a mineral.	[ "Halite is not made by living things. It is a solid.", "A computer processor is made in a factory. It is not a pure substance.", "Potassium feldspar is a solid. It is a pure substance." ]	1		closed choice	grade4	natural science	earth-science	Rocks and minerals	Identify minerals using properties	Minerals are the building blocks of rocks. A rock can be made of one or more minerals. Minerals and rocks have the following properties: Property \| Mineral \| Rock It is a solid. \| Yes \| Yes It is formed in nature. \| Yes \| Yes It is not made by organisms. \| Yes \| Yes It is a pure substance. \| Yes \| No It has a fixed cry...	Compare the properties of each substance to the properties of minerals. Select the substance whose properties do not match those of minerals. A computer processor is made in a factory. But all minerals are formed in nature. A computer processor is not a pure substance. But all minerals are pure substances. So, a comput...
Not supported with pagination yet	Which of the following contains a vague pronoun reference?	[ "Mrs. Hunt was overjoyed when she saw her granddaughter for the first time in two years.", "When Mrs. Hunt saw her granddaughter for the first time in two years, she was overjoyed." ]	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 she could refer to Mrs. Hunt or her granddaughter. When Mrs. Hunt saw her granddaughter for the first time in two years, she was overjoyed. The second answer choice shows a possible correction for the vague pronoun reference. The text has been rewr...
	Look at the models of molecules below. Select the elementary substance.	[ "fluoromethane", "oxygen", "cyclopropane" ]	1		closed choice	grade6	natural science	chemistry	Atoms and molecules	Identify elementary substances and compounds using models	There are more than 100 different chemical elements, or types of atoms. Chemical elements make up all of the substances around you. A substance may be composed of one chemical element or multiple chemical elements. Substances that are composed of only one chemical element are elementary substances. Substances that are ...
Not supported with pagination yet	How long is a sunflower seed?	[ "14 meters", "14 centimeters", "14 millimeters" ]	2	Select the best estimate.	closed choice	grade4	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 sunflower seed is 14 millimeters. 14 centimeters and 14 meters are both too long.
	Does this passage describe the weather or the climate?	[ "weather", "climate" ]	0	Figure: New Zealand. Dry air has a lower level of humidity than moist air. The air at these volcanoes felt dry last week because the humidity was very low. 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	grade5	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. Dry air has a lower level of humidity than moist air. The air at these volcanoes felt dry last week because the humidity was very low. The underlined part of the passage tells you about the humidity around the volcanoes last week. This passage describes the atmosphere at a certain place and ...
	Which i in row A?	[ "the grocery store", "the park", "the fire department", "the gas station" ]	0		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 grocery store is in row A.
	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.
	What is the name of the colony shown?	[ "Indiana", "Virginia", "Vermont", "West Virginia" ]	1		closed choice	grade4	social science	us-history	English colonies in North America	Identify the Thirteen Colonies		The colony is Virginia. The Virginia Colony included land that would later become part of the state of West Virginia. West Virginia was never its own colony.
	Which animal's skin is better adapted as a warning sign to ward off predators?	[ "hawk moth", "sharpnose-puffer" ]	1	Lionfish can release venom from the spines on their brightly colored bodies. The bright colors serve as a warning sign that the animal is venomous. The 's skin is adapted to ward off predators. Figure: lionfish.	closed choice	grade3	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 lionfish. The lionfish has venomous spines and brightly colored skin. Its skin is adapted to ward off predators. The bright colors serve as a warning sign that the lionfish is venomous. Now look at each animal. Figure out which animal has a similar adaptation. The sharpnose-puffer has a poiso...
Not supported with pagination yet	Is a ball 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 ball is a good or a service, ask these questions: Is a ball something you can touch? Yes. Is a ball a job you might pay someone else to do? No. So, a ball is a good.
	What type of rock is slate?	[ "metamorphic", "sedimentary" ]	0	Slate is a type of rock. It is often used to make roof tiles for houses. Slate can form when rocks like shale are changed by heating and squeezing.	closed choice	grade3	natural science	earth-science	Rocks and minerals	Classify rocks as igneous, sedimentary, or metamorphic	Igneous rock is formed when melted rock cools and hardens into solid rock. This type of change can occur at Earth's surface or below it. Sedimentary rock is formed when layers of sediment are pressed together to make rock. This type of change occurs below Earth's surface. Metamorphic rock is formed when a rock is chang...	Slate is a metamorphic rock. Like other metamorphic rocks, it forms when a rock is changed by heating and squeezing. The center of our planet is very hot. Deep below Earth's surface, rocks can be heated to high temperatures. The rocks can also be squeezed by the weight of rocks around them. Sometimes, the heating and s...
Not supported with pagination yet	Which is the scratchiest?	[ "burlap sack", "nylon swim shorts", "wax seal" ]	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...	Scratchy is a property. A scratchy material is rough and itchy against your skin. Look at each picture, one at a time. Imagine touching the material shown in each picture. Of the choices, the burlap sack is the scratchiest. If you touch burlap, it will feel rough and itchy.
	What is the capital of Kentucky?	[ "Louisville", "Lexington", "Oklahoma City", "Frankfort" ]	3		closed choice	grade4	social science	geography	State capitals	Identify state capitals of the Southeast		Frankfort is the capital of Kentucky.
Not supported with pagination yet	Select the plant.	[ "Salmon swim in the water.", "Daffodils have a green stem." ]	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 salmon is an animal. It swims in the water. Unlike most other fish, salmon can live in both freshwater and seawater. A daffodil is a plant. It has a green stem. Most daffodil plants grow a single flower.
	Which country is highlighted?	[ "Fiji", "Solomon Islands", "Palau", "the Marshall Islands" ]	1		closed choice	grade6	social science	geography	Oceania: geography	Identify and select countries of Oceania		This country is Solomon Islands.
Not supported with pagination yet	Which wax candle has a higher temperature?	[ "the wax candle with less thermal energy", "the wax candle with more thermal energy" ]	1	Two 18-gram wax candles are identical except for their thermal energies.	closed choice	grade5	natural science	physics	Heat and 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 wax candles are made of the same material and have the same mass. So, the wax candle with more thermal energy has a higher temperature.
Not supported with pagination yet	Which of the following parts does an animal cell have?	[ "chloroplasts", "cell membrane", "cell wall" ]	1		closed choice	grade4	natural science	biology	Cells	Compare plant and animal cells	Plant and animal cells have many parts in common, but not all. This table shows some of their similarities and differences. Cell part \| Plant cell \| Animal cell cell wall \| yes \| no cell membrane \| yes \| yes cytoplasm \| yes \| yes mitochondria \| yes \| yes vacuole \| yes \| yes chloroplasts \| yes \| no nucleus \| yes \| yes c...
Not supported with pagination yet	Complete the sentence so that it uses personification. Over millions of years, the glacier () the rock to yield, and a canyon was formed.	[ "persuaded", "caused" ]	0		closed choice	grade9	language science	writing-strategies	Creative techniques	Use personification	Personification is giving human characteristics to nonhuman things. It is a figure of speech that can be used to make writing more interesting or to emphasize a point. The trees danced in the wind. The word danced describes the trees as if they were people. Unlike people, however, trees can't actually dance. Instead, t...	Complete the sentence with the word persuaded. It describes the glacier as if it were a person who convinces others.
	Compare the average kinetic energies of the particles in each sample. Which sample has the higher temperature?	[ "sample B", "neither; the samples have the same temperature", "sample A" ]	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	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...	The particles in both samples have the same average speed, but each particle in sample B has more mass than each particle 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, sample B mus...
	Which of these continents does the equator intersect?	[ "South America", "North America", "Australia" ]	0		closed choice	grade4	social science	geography	Maps	Use lines of latitude and longitude	Lines of latitude and lines of longitude are imaginary lines drawn on some globes and maps. They can help you find places on globes and maps. Lines of latitude show how far north or south a place is. We use units called degrees to describe how far a place is from the equator. The equator is the line located at 0° latit...	The equator is the line at 0° latitude. It intersects South America. It does not intersect North America or Australia.
	Which of these continents does the prime meridian intersect?	[ "Australia", "Antarctica", "Asia" ]	1		closed choice	grade4	social science	geography	Maps	Use lines of latitude and longitude	Lines of latitude and lines of longitude are imaginary lines drawn on some globes and maps. They can help you find places on globes and maps. Lines of latitude show how far north or south a place is. We use units called degrees to describe how far a place is from the equator. The equator is the line located at 0° latit...	The prime meridian is the line at 0° longitude. It intersects Antarctica. It does not intersect Australia or Asia.
Not supported with pagination yet	What is the source of the allusion in the sentence below? Gavin's research on nineteenth-century philosophers led him down the rabbit hole.	[ "literature", "the Bible" ]	0		closed choice	grade10	language science	figurative-language	Literary devices	Recall the source of an allusion	An allusion is a brief mention of something or someone well known, often from mythology, history, or literature. An allusion lets you reference ideas from an entire story in just a few words. "I'd better get home before I turn into a pumpkin!" Lila remarked. Here, Lila alludes to the fairy tale "Cinderella," in which C...	The source of the allusion down the rabbit hole is literature. Lewis Carroll's Alice's Adventures in Wonderland tells the story of a young girl who follows a white rabbit down a rabbit hole and finds herself in a series of adventures in a surreal world. The allusion down the rabbit hole means on a strange or difficult ...
	What can Austen and Kelly trade to each get what they want?	[ "Austen can trade his tomatoes for Kelly's broccoli.", "Kelly can trade her broccoli for Austen's oranges.", "Kelly can trade her almonds for Austen's tomatoes.", "Austen can trade his tomatoes for Kelly's sandwich." ]	0	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. Austen and Kelly open their lunch boxes in the school cafeteria. Both of them could be happier with their lunches. Austen wanted ...	closed choice	grade6	social science	economics	Basic economic principles	Trade and specialization		Austen wanted broccoli in his lunch and Kelly was hoping for tomatoes. Look at the labeled part of the images. Austen has tomatoes. Kelly has broccoli. They can trade tomatoes for broccoli to both be happier. Trading other things would not help either person get more items they want.
	Which solution has a higher concentration of purple particles?	[ "Solution B", "neither; their concentrations are the same", "Solution A" ]	2	The diagram below is a model of two solutions. Each purple 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 purple particles represent the solute. To figure out which solution has a higher concentration of purple particles, look at both the number of purple particles and the volume of the solvent in each container. Use the concentration formula to find the number of purple particles per mill...
	Which of these states is farthest east?	[ "Georgia", "Arkansas", "Indiana", "Washington" ]	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 east arrow is pointing. Georgia is farthest east.
Not supported with pagination yet	Based on this information, what is this fruit fly's genotype for the eye color gene?	[ "ee", "brown eyes" ]	0	In a group of fruit flies, some individuals have red eyes and others have brown eyes. In this group, the gene for the eye color trait has two alleles. The allele E is for red eyes, and the allele e is for brown eyes. A certain fruit fly from this group has brown eyes. This fly has two alleles for brown eyes.	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. The fruit fly has two alleles for brown eyes (e). So, the fly's genotype for the eye color gene is ee.
Not supported with pagination yet	Answer the riddle. I live on a farm. I may be black and white. You can get milk from me. What am I?	[ "a cow", "a turtle" ]	0		closed choice	grade1	language science	vocabulary	Comprehension strategies	What am I?		A cow lives on a farm. A cow may be black and white. You can get milk from a cow.
	Is glue a mineral?	[ "no", "yes" ]	0	Glue has the following properties: human-made liquid not a pure substance no fixed crystal structure	yes or no	grade5	natural science	earth-science	Rocks and minerals	Identify rocks and minerals	Properties are used to identify different substances. Minerals have the following properties: It is a solid. It is formed in nature. It is not made by organisms. It is a pure substance. It has a fixed crystal structure. If a substance has all five of these properties, then it is a mineral. Look closely at the last thre...	Glue does not have all the properties of a mineral. So, glue is not a mineral.
	What is the direction of this push?	[ "away from the bottom magnet", "toward the bottom magnet" ]	0	A child's magnet hovers above another magnet on a desk. This happens because each magnet repels the other with a magnetic force. This force is a push. The force from the magnet on the desk pushes up on the child's magnet.	closed choice	grade4	natural science	physics	Force and motion	Identify directions of forces	A force is a push or a pull that one object applies to another. Every force has a direction. The direction of a push is away from the object that is pushing. The direction of a pull is toward the object that is pulling.	The bottom magnet pushes the top magnet. The direction of the push is away from the bottom magnet.
	What is the name of the colony shown?	[ "New Jersey", "Tennessee", "Delaware", "North Carolina" ]	3		closed choice	grade7	social science	us-history	Colonial America	Identify the Thirteen Colonies		The colony is North Carolina.
Not supported with pagination yet	How long is a rowboat?	[ "3 centimeters", "3 kilometers", "3 meters", "3 millimeters" ]	2	Select the best estimate.	closed choice	grade7	natural science	units-and-measurement	Units and measurement	Choose metric units of distance, mass, and volume	Measurements are written with both a number and a unit. The unit comes after the number. The unit shows what the number means. When you are using metric units, length can be written with units of millimeters, centimeters, meters, or kilometers. One meter contains 100 centimeters or 1,000 millimeters. So, 1 meter is lar...	The best estimate for the length of a rowboat is 3 meters. 3 millimeters and 3 centimeters are too short. 3 kilometers is too long.
Not supported with pagination yet	Based on this information, what is this catfish's phenotype for the body color trait?	[ "a white body", "a brown body" ]	0	In a group of Channel catfish, some individuals have a brown body and others have a white body. In this group, the gene for the body color trait has two alleles. The allele for a brown body (B) is dominant over the allele for a white body (b). A certain Channel catfish from this group has the homozygous genotype bb for...	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 ...	The Channel catfish's genotype for the body color gene is bb. The Channel catfish's genotype of bb has only b alleles. The b allele is for a white body. So, the Channel catfish's phenotype for the body color trait must be a white body. To check this answer, consider whether the Channel catfish's alleles are dominant or...
Not supported with pagination yet	Is cutting hair a good or a service?	[ "a service", "a good" ]	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 cutting hair is a good or a service, ask these questions: Is cutting hair something you can touch? No. Is cutting hair a job you might pay someone else to do? Yes. So, cutting hair is a service.
	Will these magnets attract or repel each other?	[ "repel", "attract" ]	1	Two magnets are placed as shown.	closed choice	grade4	natural science	physics	Magnets	Identify magnets that attract or repel	Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart. Whether a magnet attracts or repels other magnets depends on the positions of its poles, or ends. Every magnet has two poles: north and south. Here are some examples of magnets. The no...	To predict if these magnets will attract or repel, look at which poles are closest to each other. 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.
	Complete the sentence. The Queen Charlotte Fault formed at a () boundary.	[ "convergent", "divergent", "transform" ]	2	Read the passage and look at the picture. The Queen Charlotte Fault marks a boundary between the Pacific Plate and the North American Plate. The two plates slide past each other along this fault, which lies off the west coast of British Columbia, Canada. A magnitude 8.1 earthquake occurred along this fault in 1949, for...	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 convergent boundary, two plates are moving toward each other. At a diverge...	To figure out what type of plate boundary formed the Queen Charlotte Fault, you need to know how the tectonic plates interacted. To find this out, read the passage carefully. The Queen Charlotte Fault marks a boundary between the Pacific Plate and the North American Plate. The two plates slide past each other along thi...
	Does this passage describe the weather or the climate?	[ "weather", "climate" ]	1	Figure: Antarctica. Bright clouds fill the sky above Antarctica each winter. The clouds form at high altitudes of around 70,000 feet and reflect the sun's light downwards. 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. Bright clouds fill the sky above Antarctica each winter. The clouds form at high altitudes of around 70,000 feet and reflect the sun's light downwards. The underlined part of the passage tells you about the usual pattern of cloud cover in Antarctica. This passage does not describe what the w...
Not supported with pagination yet	Which of the following contains a vague pronoun reference?	[ "In the directions for assembling the bookshelves, Step 8 says to tighten the screws with an Allen wrench.", "In the directions for assembling the bookshelves, it says to tighten the screws with an Allen wrench." ]	1		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 it is used without its antecedent. The second answer choice shows a possible correction for the vague pronoun reference. It has been replaced with Step 8. In the directions for assembling the bookshelves, Step 8 says to tighten the screws with an A...
Not supported with pagination yet	Compare the motion of two buses. Which bus was moving at a higher speed?	[ "a bus that moved 450kilometers in 10hours", "a bus that moved 550kilometers in 10hours" ]	1		closed choice	grade2	natural science	physics	Force and motion	Compare the speeds of moving objects	An object's speed tells you how fast the object is moving. Speed depends on both distance and time. Distance tells you how far the object has moved. One unit used to measure distance is the kilometer. Time tells you how long the object has spent moving. One unit used to measure time is the hour. Think about two objects...	Look at the distance each bus moved and the time it took to move that distance. One bus moved 550 kilometers in 10 hours. The other bus moved 450 kilometers in 10 hours. Notice that each bus spent the same amount of time moving. The bus that moved 550 kilometers moved a farther distance in that time. So, that bus must ...
	Which of the following was an independent variable in this experiment?	[ "the change in weight for each plant", "the watering method used" ]	1	The passage below describes an experiment. Read the passage and think about the variables that are described. Lindsey had four air plants on her desk that were not growing. She suspected that they needed more water. Lindsey's sister recommended soaking the air plants in a bowl of water once a week. Lindsey's coworker ...	closed choice	grade6	natural science	science-and-engineering-practices	Designing experiments	Identify independent and dependent variables	Experiments have variables, or parts that change. You can design an experiment to find out how one variable affects another variable. For example, imagine that you want to find out if fertilizer affects the number of tomatoes a tomato plant grows. To answer this question, you decide to set up two equal groups of tomato...
Not supported with pagination yet	Which of the following contains a vague pronoun reference?	[ "Peter gave a beautifully bound copy of his favorite book, One Hundred Years of Solitude, to Jake.", "Peter gave Jake a beautifully bound copy of One Hundred Years of Solitude, which is his favorite book." ]	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 his could refer to Peter or Jake. Peter gave Jake a beautifully bound copy of One Hundred Years of Solitude, which is his favorite book. The first answer choice shows a possible correction for the vague pronoun reference. The text has been rewritt...
Not supported with pagination yet	Complete the sentence. Melting wax is a ().	[ "chemical change", "physical change" ]	1		closed choice	grade5	natural science	chemistry	Physical and chemical change	Compare physical and chemical changes	Matter is made of very small particles called atoms. Atoms can be linked together by chemical bonds. When two or more atoms link together, they form a molecule. In a chemical change, the chemical bonds in the molecules break. The atoms then link together to form new molecules. The types of molecules in matter before an...	Melting wax is a change of state. So, it is a physical change. The wax changes from solid to liquid. But it is still made of the same type of matter.
Not supported with pagination yet	Which of the following contains a vague pronoun reference?	[ "Mark sent them the transcript from his old college, but he still wasn't granted an exemption from English 101.", "Mark sent the registrar's office the transcript from his old college, but he still wasn't granted an exemption from English 101." ]	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 second answer choice contains a vague pronoun reference. The pronoun them is used without its antecedent. The first answer choice shows a possible correction for the vague pronoun reference. Them has been replaced with the registrar's office. Mark sent the registrar's office the transcript from his old college, but...
Not supported with pagination yet	What do these two changes have in common? peeling a banana getting a haircut	[ "Both are chemical changes.", "Both are only physical changes.", "Both are caused by cooling.", "Both are caused by heating." ]	1		closed choice	grade3	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. Peeling a banana is a physical change. The peel is not covering the rest of the fruit anymore. But both the peel and the banana are still made of the same type of matter as before. Getting a haircut is a physical change. Your hair is shorter after a haircut. But it is still made of the ...
Not supported with pagination yet	What information supports the conclusion that Charlie acquired this trait?	[ "Charlie has three jump ropes, each made of a different material.", "Charlie won a competition at his school with his jump rope tricks.", "Charlie's sister taught him how to do tricks with a jump rope." ]	2	Read the description of a trait. Charlie knows how to do tricks with a jump rope.	closed choice	grade7	natural science	biology	Genes to traits	Inherited and acquired traits: use evidence to support a statement	Organisms, including people, have both inherited and acquired traits. Inherited and acquired traits are gained in different ways. Inherited traits are passed down from biological parents to their offspring through genes. Genes are pieces of hereditary material that contain the instructions that affect inherited traits....
	Which solution has a higher concentration of purple particles?	[ "Solution B", "neither; their concentrations are the same", "Solution A" ]	0	The diagram below is a model of two solutions. Each purple 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 purple particles represent the solute. To figure out which solution has a higher concentration of purple particles, look at both the number of purple particles and the volume of the solvent in each container. Use the concentration formula to find the number of purple particles per mill...
	What is the capital of South Dakota?	[ "Albany", "Pierre", "Fayetteville", "Rapid City" ]	1		closed choice	grade4	social science	geography	State capitals	Identify state capitals of the Midwest		Pierre is the capital of South Dakota.
	Which solution has a higher concentration of blue particles?	[ "neither; their concentrations are the same", "Solution A", "Solution B" ]	1	The diagram below is a model of two solutions. Each blue 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 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	What do these two changes have in common? plants making food from sunlight, air, and water a piece of pizza rotting in a trashcan	[ "Both are chemical changes.", "Both are caused by heating.", "Both are caused by cooling.", "Both are only physical changes." ]	0		closed choice	grade3	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. Plants making food is a chemical change. Plants use energy from sunlight to change air and water into food. The food is sugar. Sugar is a different type of matter than air or water. A piece of pizza rotting is a chemical change. The matter in the pizza breaks down and slowly turns into ...
	What is the capital of California?	[ "Little Rock", "Sacramento", "San Francisco", "Boston" ]	1		closed choice	grade5	social science	geography	State capitals	Identify the 50 state capitals		Sacramento is the capital of California.
	Which of the following could Bridgette and Eva's test show?	[ "if the concrete from each batch took the same amount of time to dry", "if a new batch of concrete was firm enough to use" ]	1	People can use the engineering-design process to develop solutions to problems. One step in the process is testing if a potential solution meets the requirements of the design. The passage below describes how the engineering-design process was used to test a solution to a problem. Read the passage. Then answer the ques...	closed choice	grade6	natural science	science-and-engineering-practices	Engineering practices	Evaluate tests of engineering-design solutions	People can use the engineering-design process to develop solutions to problems. One step in the process is testing if a potential solution meets the requirements of the design. How can you determine what a test can show? You need to figure out what was tested and what was measured. Imagine an engineer needs to design a...
	Select the bird below.	[ "California toad", "keel-billed toucan" ]	1	Birds have feathers, two wings, and a beak. A white stork is an example of a bird.	closed choice	grade3	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 California toad is an amphibian. It has moist skin and begins its life in water. Toads do not have teeth! They swallow their food whole. A keel-billed toucan is a bird. It has feathers, two wings, and a beak. Toucans have large beaks. A toucan's beak can be half as long as its body.
Not supported with pagination yet	Which figure of speech is used in this text? After Becky cooked and served a scrumptious dinner, Dad boasted that she is the Julia Child of our family.	[ "simile", "allusion" ]	1		closed choice	grade6	language science	figurative-language	Literary devices	Classify figures of speech	Figures of speech are words or phrases that use language in a nonliteral or unusual way. They can make writing more expressive. Alliteration is the repetition of sounds at the beginning of nearby words. What a lucky little lady you are! An allusion is a brief reference to something or someone well known, often from his...	The text uses an allusion, a brief reference to someone or something well known. Julia Child alludes to the famous chef who is known for popularizing French cuisine in the United States.
Not supported with pagination yet	How long is a rowboat?	[ "4 centimeters", "4 kilometers", "4 millimeters", "4 meters" ]	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 a rowboat is 4 meters. 4 millimeters and 4 centimeters are too short. 4 kilometers is too long.
Not supported with pagination yet	Suppose Toby decides to see the eagles. Which result would be a cost?	[ "Toby will spend more time walking to the eagles. They are on the other side of the zoo, but the baboons are close by.", "Toby will enjoy seeing the eagles more than he would have enjoyed seeing the baboons." ]	0	Toby is deciding whether to see the eagles or the baboons at the zoo. He wants to see lots of animals, but the zoo is closing soon.	closed choice	grade4	social science	economics	Basic economic principles	Costs and benefits	Before you decide to do something, it is often helpful to list costs and benefits. Costs are what you give up or spend when you decide to do something. Costs involve giving up things that you want or need. Benefits are what you gain or save when you decide to do something. Benefits involve gaining something that you wa...	This result is a cost. It involves giving up or spending something that Toby wants or needs: Toby will spend more time walking to the eagles. They are on the other side of the zoo, but the baboons are close by.
	Which of the following could Britney'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	grade8	natural science	science-and-engineering-practices	Engineering practices	Evaluate tests of engineering-design solutions	People can use the engineering-design process to develop solutions to problems. One step in the process is testing if a potential solution meets the requirements of the design. How can you determine what a test can show? You need to figure out what was tested and what was measured. Imagine an engineer needs to design a...

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.