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train/3200 | Is the following statement about our solar system true or false?
The volume of Earth is more than ten times the volume of Mercury. | [
"true",
"false"
] | 0 | Use the data to answer the question below. | true-or false | grade8 | natural science | earth-science | Astronomy | Analyze data to compare properties of planets | A planet's volume tells you the size of the planet.
The primary composition of a planet is what the planet is made mainly of. In our solar system, planets are made mainly of rock, gas, or ice.
The volume of a planet is a very large quantity. Large quantities such as this are often written in scientific notation.
For ex... | To determine if this statement is true, calculate the value of ten times the volume of Mercury.
Then compare the result to the volume of Earth. The volume of Earth is 1.08 x 10^12 km^3, which is greater than 6.08 x 10^11 km^3. So, the volume of Earth is more than ten times the volume of Mercury. |
train/3201 | Which country is highlighted? | [
"Saint Vincent and the Grenadines",
"Grenada",
"Saint Lucia",
"Barbados"
] | 0 | closed choice | grade7 | social science | geography | The Americas: geography | Identify and select countries of the Caribbean | This country is Saint Vincent and the Grenadines. | ||
train/3202 | Select the organism in the same species as the garden hyacinth. | [
"Camellia sasanqua",
"Sarracenia purpurea",
"Hyacinthus orientalis"
] | 2 | This organism is a garden hyacinth. Its scientific name is Hyacinthus orientalis. | closed choice | grade4 | natural science | biology | Scientific names | Use scientific names to classify organisms | Scientists use scientific names to identify organisms. Scientific names are made of two words.
The first word in an organism's scientific name tells you the organism's genus. A genus is a group of organisms that share many traits.
A genus is made up of one or more species. A species is a group of very similar organisms... | A garden hyacinth's scientific name is Hyacinthus orientalis.
Sarracenia purpurea does not have the same scientific name as a garden hyacinth. So, Hyacinthus orientalis and Sarracenia purpurea are not in the same species.
Hyacinthus orientalis has the same scientific name as a garden hyacinth. So, these organisms are i... |
train/3203 | What is the capital of Washington? | [
"Santa Fe",
"Olympia",
"Helena",
"Seattle"
] | 1 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the West | Olympia is the capital of Washington. | ||
train/3204 | Which of the following could Kendall's test show? | [
"whether producing more insulin would help the bacteria grow faster",
"whether different types of bacteria would need different nutrients to produce insulin",
"whether she added enough nutrients to help the bacteria produce 20% more insulin"
] | 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... | |
train/3205 | What is the capital of Washington? | [
"Juneau",
"Seattle",
"Olympia",
"Spokane"
] | 2 | closed choice | grade5 | social science | geography | State capitals | Identify the 50 state capitals | Olympia is the capital of Washington. | ||
train/3206 | Does this passage describe the weather or the climate? | [
"climate",
"weather"
] | 1 | Figure: Sahara Desert.
The Sahara Desert covers a large part of northern Africa. In 1984, the Sahara received less than one inch of rain over the entire year!
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 | 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.
The Sahara Desert covers a large part of northern Africa. In 1984, the Sahara received less than one inch of rain over the entire year!
The underlined part of the passage tells you about the amount of precipitation that fell in the Sahara Desert in 1984. This passage describes the atmosphere... |
train/3207 | What is the capital of Louisiana? | [
"Albany",
"Baton Rouge",
"New Orleans",
"Tallahassee"
] | 1 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the Southeast | Baton Rouge is the capital of Louisiana. | ||
train/3208 | What is the capital of New Mexico? | [
"Olympia",
"Santa Fe",
"Provo",
"Albuquerque"
] | 1 | closed choice | grade4 | social science | geography | State capitals | Identify the 50 state capitals | Santa Fe is the capital of New Mexico. | ||
train/3209 | Select the bird below. | [
"tiger shark",
"poison dart frog",
"blue-footed booby",
"Mojave rattlesnake"
] | 2 | Birds have feathers, two wings, and a beak.
Birds are warm-blooded. Warm-blooded animals can control their body temperature.
A brown pelican is an example of a bird. | closed choice | grade4 | natural science | biology | Classification | Identify mammals, birds, fish, reptiles, and amphibians | Birds, mammals, fish, reptiles, and amphibians are groups of animals. Scientists sort animals into each group based on traits they have in common. This process is called classification.
Classification helps scientists learn about how animals live. Classification also helps scientists compare similar animals. | A tiger shark is a fish. It lives underwater. It has fins, not limbs.
Tiger sharks are nocturnal. This means that they are active mostly at night.
A blue-footed booby is a bird. It has feathers, two wings, and a beak.
Blue-footed boobies live on tropical islands in the Pacific Ocean.
A poison dart frog is an amphibian.... |
train/3210 | What is the expected ratio of offspring with bush growth to offspring with climbing growth? Choose the most likely ratio. | [
"2:2",
"0:4",
"4:0",
"3:1",
"1:3"
] | 0 | This passage describes the growth pattern trait in rose plants:
Climbing growth and bush growth are different growth patterns in rose plants. Rose plants with climbing growth have long, bendable stems that act like vines. These plants may grow upward to cover fences or walls. Rose plants with bush growth stay near the ... | closed choice | grade8 | natural science | biology | Genes to traits | Use Punnett squares to calculate ratios of offspring types | Offspring phenotypes: dominant or recessive?
How do you determine an organism's phenotype for a trait? Look at the combination of alleles in the organism's genotype for the gene that affects that trait. Some alleles have types called dominant and recessive. These two types can cause different versions of the trait to a... | To determine how many boxes in the Punnett square represent offspring with bush growth or climbing growth, consider whether each phenotype is the dominant or recessive allele's version of the growth pattern trait. The question tells you that the g allele, which is for bush growth, is recessive to the G allele, which is... |
train/3211 | Which of these states is farthest east? | [
"New Mexico",
"Washington",
"North Dakota",
"Wyoming"
] | 2 | closed choice | grade5 | social science | geography | Maps | Read a map: cardinal directions | Maps have four cardinal directions, or main directions. Those directions are north, south, east, and west.
A compass rose is a set of arrows that point to the cardinal directions. A compass rose usually shows only the first letter of each cardinal direction.
The north arrow points to the North Pole. On most maps, north... | To find the answer, look at the compass rose. Look at which way the east arrow is pointing. North Dakota is farthest east. | |
train/3212 | Look at the models of molecules below. Select the elementary substance. | [
"fluorine",
"cyclopropane",
"carbon tetrachloride"
] | 0 | 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 ... | ||
train/3213 | Which of the following organisms is the producer in this food web? | [
"bat star",
"sea cucumber",
"black rockfish",
"phytoplankton"
] | 3 | Below is a food web from an ocean ecosystem in Monterey Bay, off the coast of California.
A food web models how the matter eaten by organisms moves through an ecosystem. The arrows in a food web represent how matter moves between organisms in an ecosystem. | closed choice | grade8 | natural science | biology | Ecological interactions | Interpret food webs I | A food web is a model.
A food web shows where organisms in an ecosystem get their food. Models can make things in nature easier to understand because models can represent complex things in a simpler way. If a food web showed every organism in an ecosystem, the food web would be hard to understand. So, each food web sho... | Producers do not eat other organisms. So, in a food web, producers do not have arrows pointing to them from other organisms.
The kelp does not have any arrows pointing to it. So, the kelp is a producer.
The black rockfish has an arrow pointing to it, so it is not a producer.
The phytoplankton does not have any arrows p... |
train/3214 | Which of these states is farthest west? | [
"Tennessee",
"Minnesota",
"New Jersey",
"Washington"
] | 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 west arrow is pointing. Washington is farthest west. | |
train/3215 | Which two months have the same average temperature in Portland? | [
"September and October",
"July and August",
"April and May"
] | 1 | Use the graph to answer the question below. | closed choice | grade4 | natural science | earth-science | Weather and climate | Use climate data to make predictions | Scientists record climate data from places around the world. Temperature is one type of climate data. Scientists collect data over many years. They can use this data to calculate the average temperature for each month. The average temperature can be used to describe the climate of a location.
A line graph can be used t... | To describe the average temperature trends in Portland, look at the graph.
Choice "Apr" is incorrect.
Choice "May" is incorrect.
Choice "Jul" is incorrect.
Choice "Aug" is incorrect.
Choice "Sep" is incorrect.
Choice "Oct" is incorrect.
Out of all the answer choices, only July and August have the same average temperatu... |
train/3216 | Which of these states is farthest north? | [
"Missouri",
"Massachusetts",
"Maine",
"Florida"
] | 2 | closed choice | grade5 | social science | geography | Maps | Read a map: cardinal directions | Maps have four cardinal directions, or main directions. Those directions are north, south, east, and west.
A compass rose is a set of arrows that point to the cardinal directions. A compass rose usually shows only the first letter of each cardinal direction.
The north arrow points to the North Pole. On most maps, north... | To find the answer, look at the compass rose. Look at which way the north arrow is pointing. Maine is farthest north. | |
train/3217 | Which trait did Palaeocyparis have? Select the trait you can observe on the fossil. | [
"flowers",
"short, thin leaves",
"cones"
] | 1 | This picture shows a fossil of an ancient plant called Palaeocyparis. This fossil shows one of the plant's branches.
Fossils of Palaeocyparis have been found in rocks that are more than 150,000,000 years old. | closed choice | grade6 | natural science | earth-science | Fossils | Compare fossils to modern organisms | The way an organism looks or acts is called a trait. Scientists use fossils to learn more about the traits of ancient organisms.
Fossils can preserve the remains of body parts and activities. A fossil of a body part, such as a tail or a wing, can tell you what an organism looked like. A fossil of an organism's activiti... | |
train/3218 | In this food web, which organism contains matter that eventually moves to the sea cucumber? | [
"sea urchin",
"black rockfish",
"kelp bass"
] | 0 | Below is a food web from an ocean ecosystem in Monterey Bay, off the coast of California.
A food web models how the matter eaten by organisms moves through an ecosystem. The arrows in a food web represent how matter moves between organisms in an ecosystem. | closed choice | grade6 | natural science | biology | Ecological interactions | Interpret food webs II | A food web is a model.
A food web shows where organisms in an ecosystem get their food. Models can make things in nature easier to understand because models can represent complex things in a simpler way. If a food web showed every organism in an ecosystem, the food web would be hard to understand. So, each food web sho... | Use the arrows to follow how matter moves through this food web. For each answer choice, try to find a path of arrows to the sea cucumber.There is one path matter can take from the sea urchin to the sea cucumber: sea urchin->sea otter->orca->sea cucumber. There is one path matter can take from the plainfin midshipman t... |
train/3219 | Which of these cities is marked on the map? | [
"Boston",
"Houston",
"Washington, D.C.",
"St. Louis"
] | 1 | closed choice | grade5 | social science | geography | Cities | Major U.S. cities | The city is Houston, Texas. Boston, Washington, D.C., and St. Louis are marked with gray circles on the map below. | ||
train/3220 | Which of the following could Jordan's test show? | [
"how steady a parachute with a 1 m vent was at 200 km per hour",
"whether a parachute with a 1 m vent would swing too much at 400 km per hour",
"if the spacecraft was damaged when using a parachute with a 1 m vent going 200 km per hour"
] | 0 | People can use the engineering-design process to develop solutions to problems. One step in the process is testing if a potential solution meets the requirements of the design.
The passage below describes how the engineering-design process was used to test a solution to a problem. Read the passage. Then answer the ques... | closed choice | grade7 | natural science | science-and-engineering-practices | Engineering practices | Evaluate tests of engineering-design solutions | People can use the engineering-design process to develop solutions to problems. One step in the process is testing if a potential solution meets the requirements of the design. How can you determine what a test can show? You need to figure out what was tested and what was measured.
Imagine an engineer needs to design a... | |
train/3221 | Which solution has a higher concentration of blue particles? | [
"Solution B",
"Solution A",
"neither; their concentrations are the same"
] | 0 | The diagram below is a model of two solutions. Each blue ball represents one particle of solute. | closed choice | grade8 | natural science | chemistry | Solutions | Compare concentrations of solutions | A solution is made up of two or more substances that are completely mixed. In a solution, solute particles are mixed into a solvent. The solute cannot be separated from the solvent by a filter. For example, if you stir a spoonful of salt into a cup of water, the salt will mix into the water to make a saltwater solution... | In Solution A and Solution B, the blue particles represent the solute. To figure out which solution has a higher concentration of blue particles, look at both the number of blue particles and the volume of the solvent in each container.
Use the concentration formula to find the number of blue particles per milliliter.
... |
train/3222 | What is the capital of Iowa? | [
"Lincoln",
"Annapolis",
"Cambridge",
"Des Moines"
] | 3 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the Midwest | Des Moines is the capital of Iowa. | ||
train/3223 | Which animal's feet are also adapted for grabbing prey? | [
"red-tailed hawk",
"pronghorn"
] | 0 | Bald eagles eat fish, mammals, and other birds. The 's feet are adapted for grabbing prey.
Figure: bald eagle. | 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 bald eagle.
The bald eagle has long toes with sharp claws. Its feet are adapted for grabbing prey. The sharp claws can help the bald eagle attack and kill its prey. The long toes can help it hold on to its prey.
Now look at each animal. Figure out which animal has a similar adaptation.
The re... |
train/3224 | What is the capital of Wyoming? | [
"Hilo",
"Juneau",
"Phoenix",
"Cheyenne"
] | 3 | closed choice | grade3 | social science | geography | State capitals | Identify the 50 state capitals | Cheyenne is the capital of Wyoming. | ||
train/3225 | What is the capital of California? | [
"San Francisco",
"Knoxville",
"Sacramento",
"Salt Lake City"
] | 2 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the West | Sacramento is the capital of California. | ||
train/3226 | Which of these states is farthest west? | [
"New Hampshire",
"Michigan",
"North Dakota",
"Louisiana"
] | 2 | closed choice | grade2 | social science | geography | Geography | Read a map: cardinal directions | To find the answer, look at the compass rose. Look at which way the west arrow is pointing. North Dakota is farthest west. | ||
train/3227 | Which continent is highlighted? | [
"Africa",
"North America",
"South America",
"Antarctica"
] | 3 | closed choice | grade8 | social science | geography | Physical Geography | Oceans and continents | A continent is one of the major land masses on the earth. Most people say there are seven continents. | This continent is Antarctica. | |
train/3228 | Which trait does this leaf-cutter ant have? | [
"The outside of its body is soft.",
"It can carry a piece of a leaf.",
"It eats leaves."
] | 1 | This picture shows a leaf-cutter ant. A leaf-cutter ant is a type of insect. Each leaf-cutter ant has a hard outer covering called an exoskeleton. The exoskeleton helps protect the ant's body.
This type of ant is called a leaf-cutter because it cuts pieces of leaves off plants. Leaf-cutter ants do not eat the leaf piec... | closed choice | grade3 | natural science | literacy-in-science | Animals | Benefits of group behavior: leaf-cutter ants | Both the picture and the text tell you about the traits of leaf-cutter ants. Start with the text.
This type of ant is called a leaf-cutter because it cuts pieces of leaves off plants. Leaf-cutter ants do not eat the leaf pieces. Instead, they use the pieces to grow their food.
The outside of a leaf-cutter ant's body is... | |
train/3229 | Which trait did Neuropteris have? Select the trait you can observe on the fossil. | [
"fruit",
"leaves arranged in rows",
"red flowers"
] | 1 | This picture shows a fossil of an ancient plant called Neuropteris.
Neuropteris fossils are often found in coal. Some Neuropteris fossils are more than 300,000,000 years old. | closed choice | grade3 | natural science | earth-science | Fossils | Compare fossils to modern organisms | The way an organism looks or acts is called a trait. Scientists use fossils to learn more about the traits of ancient organisms.
Fossils can preserve the remains of body parts and activities. A fossil of a body part, such as a tail or a wing, can tell you what an organism looked like. A fossil of an organism's activiti... | |
train/3230 | What is the capital of New York? | [
"Albany",
"Louisville",
"New York City",
"Buffalo"
] | 0 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the Northeast | Albany is the capital of New York. | ||
train/3231 | Which two months have the same average temperature in Portland? | [
"November and December",
"July and August",
"April and May"
] | 1 | Use the graph to answer the question below. | closed choice | grade4 | natural science | earth-science | Weather and climate | Use climate data to make predictions | To describe the average temperature trends in Portland, look at the graph.
Choice "Apr" is incorrect.
Choice "May" is incorrect.
Choice "Jul" is incorrect.
Choice "Aug" is incorrect.
Choice "Nov" is incorrect.
Choice "Dec" is incorrect.
Out of all the answer choices, only July and August have the same average temperatu... | |
train/3232 | 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. |
train/3233 | What is the capital of Washington? | [
"Nashville",
"Richmond",
"Frankfort",
"Olympia"
] | 3 | closed choice | grade3 | social science | geography | State capitals | Identify the 50 state capitals | Olympia is the capital of Washington. | ||
train/3234 | Which of these states is farthest west? | [
"Connecticut",
"Delaware",
"Virginia",
"Kansas"
] | 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 west arrow is pointing. Kansas is farthest west. | |
train/3235 | 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. |
train/3236 | What is the probability that a rat produced by this cross will have dumbo ears? | [
"3/4",
"2/4",
"4/4",
"0/4",
"1/4"
] | 3 | This passage describes the ear type trait in rats:
Some rats have dumbo ears, which are larger and rounder than normal ears. Dumbo ears are also set on the sides of the rat's head instead of on the top. The word dumbo comes from the name of a cartoon elephant whose ears had a similar appearance.
In a group of rats, som... | closed choice | grade8 | natural science | biology | Genes to traits | Use Punnett squares to calculate probabilities of offspring types | Offspring phenotypes: dominant or recessive?
How do you determine an organism's phenotype for a trait? Look at the combination of alleles in the organism's genotype for the gene that affects that trait. Some alleles have types called dominant and recessive. These two types can cause different versions of the trait to a... | |
train/3237 | Which of the following organisms is the secondary consumer in this food web? | [
"water flea",
"green algae",
"copepod"
] | 2 | 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... | Secondary consumers eat primary consumers, and primary consumers eat producers. So, in a food web, secondary consumers have arrows pointing to them from primary consumers. Primary consumers have arrows pointing to them from producers.
The copepod has an arrow pointing to it from the rotifer. The rotifer is a primary co... |
train/3238 | 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. |
train/3239 | Which of these states is farthest west? | [
"Missouri",
"South Carolina",
"Rhode Island",
"Texas"
] | 3 | closed choice | grade3 | social science | geography | Geography | Read a map: cardinal directions | Maps have four cardinal directions, or main directions. Those directions are north, south, east, and west.
A compass rose is a set of arrows that point to the cardinal directions. A compass rose usually shows only the first letter of each cardinal direction.
The north arrow points to the North Pole. On most maps, north... | To find the answer, look at the compass rose. Look at which way the west arrow is pointing. Texas is farthest west. | |
train/3240 | Which country is highlighted? | [
"Kiribati",
"Vanuatu",
"the Marshall Islands",
"Nauru"
] | 3 | closed choice | grade7 | social science | geography | Oceania: geography | Identify and select countries of Oceania | This country is Nauru. | ||
train/3241 | What type of rock is diorite? | [
"metamorphic",
"igneous",
"sedimentary"
] | 1 | Diorite forms from melted rock. Dolerite can form when melted rock cools below the earth's surface. This piece of diorite has white and black mineral grains in it.
Diorite is a very hard rock. The people of ancient Egypt used diorite to make pottery and sculptures. Diorite was also used to polish other rocks such as gr... | closed choice | grade7 | 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, or compacted, to make rock. This type of change occurs below Earth's surface.
Metamorphic rock is formed when ... | Diorite is an igneous rock. Like other igneous rocks, it forms when melted rock cools and hardens.
Melted rock below the earth's surface is called magma. Diorite forms from magma that contains large amounts of iron, magnesium, and silica. As the magma cools, minerals such as feldspar and biotite begin to form. When the... |
train/3242 | Which country is highlighted? | [
"New Zealand",
"Tuvalu",
"Australia",
"Papua New Guinea"
] | 0 | closed choice | grade7 | social science | geography | Oceania: geography | Identify and select countries of Oceania | This country is New Zealand. | ||
train/3243 | Based on the continuum scale, which character is nicer? | [
"Cinderella",
"Goldilocks"
] | 0 | This continuum scale shows some famous characters from folktales. | closed choice | grade5 | 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 some famous characters from folktales.
Nicer characters are shown to the left. Meaner characters are shown to the right. Cinderella is shown farthest to the left, farther than Goldilocks. This tells you that Cinderella is nicer. |
train/3244 | What is the capital of Pennsylvania? | [
"Cambridge",
"Harrisburg",
"Hartford",
"Atlanta"
] | 1 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the Northeast | Harrisburg is the capital of Pennsylvania. | ||
train/3245 | What is the capital of Vermont? | [
"Montpelier",
"Burlington",
"Santa Fe",
"Jackson"
] | 0 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the Northeast | Montpelier is the capital of Vermont. | ||
train/3246 | Which property do these three objects have in common? | [
"hard",
"bouncy",
"stretchy"
] | 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 hard object does not change shape when pressed or squeezed. All three objects are hard.
A bouncy object will bounce back from the floor if you drop it. The magnifying glass and the rainbow sucker are not bouncy.
A stretchy object gets longer when y... |
train/3247 | Which trait did Asterotrygon have? Select the trait you can observe on the fossil. | [
"a wide tail fin",
"spots on its skin",
"a long, thin tail",
"four legs"
] | 2 | This picture shows a fossil of an ancient animal called Asterotrygon. The fossil preserves the shape of Asterotrygon's body.
Asterotrygon was a type of fish. It lived in lakes and gave birth to live young. | closed choice | grade6 | natural science | earth-science | Fossils | Compare fossils to modern organisms | The way an organism looks or acts is called a trait. Scientists use fossils to learn more about the traits of ancient organisms.
Fossils can preserve the remains of body parts and activities. A fossil of a body part, such as a tail or a wing, can tell you what an organism looked like. A fossil of an organism's activiti... | |
train/3248 | Which i in column 1? | [
"the library",
"the restaurant",
"the grocery store",
"the park"
] | 1 | 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 restaurant is in column 1. | |
train/3249 | Which country is highlighted? | [
"New Zealand",
"Tuvalu",
"Fiji",
"Tonga"
] | 1 | closed choice | grade6 | social science | geography | Oceania: geography | Identify and select countries of Oceania | This country is Tuvalu. | ||
train/3250 | 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 smaller in Pair 2.",
"The magnitude of the magnetic force is smaller in Pair 1.",
"The magnitude of the magnetic force is the same in both pairs."
] | 0 | The images below show two pairs of magnets. The magnets in different pairs do not affect each other. All the magnets shown are made of the same material, but some of them are different sizes. | closed choice | grade6 | natural science | physics | Velocity, acceleration, and forces | Compare magnitudes of magnetic forces | Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart. These pulls and pushes between magnets are called magnetic forces.
The strength of a force is called its magnitude. The greater the magnitude of the magnetic force between two magnets,... | Magnet sizes affect the magnitude of the magnetic force. Imagine magnets that are the same shape and made of the same material. The smaller the magnets, the smaller the magnitude of the magnetic force between them.
Magnet A is the same size in both pairs. But Magnet B is smaller in Pair 2 than in Pair 1. So, the magnit... |
train/3251 | Will these magnets attract or repel each other? | [
"attract",
"repel"
] | 1 | Two magnets are placed as shown. | closed choice | grade4 | natural science | physics | Magnets | Identify magnets that attract or repel | Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart.
Whether a magnet attracts or repels other magnets depends on the positions of its poles, or ends. Every magnet has two poles: north and south.
Here are some examples of magnets. The no... | To predict if these magnets will attract or repel, look at which poles are closest to each other.
Both poles of each magnet line up with both poles of the other magnet. The north pole of each magnet is closest to the north pole of the other magnet. Like poles repel. So, these magnets will repel each other. |
train/3252 | Which statement is supported by these pictures? | [
"The Japanese sea lily has feather-like arms, and so did Hapalocrinus.",
"The Japanese sea lily has a long stem, but Hapalocrinus did not."
] | 0 | Look at the two pictures below. The Japanese sea lily is a modern organism, and Hapalocrinus is an extinct one. The Japanese sea lily has many of the traits that Hapalocrinus had. | closed choice | grade4 | natural science | earth-science | Fossils | Compare ancient and modern organisms: use observations to support a hypothesis | Fossils are the remains of organisms that lived long ago. Scientists look at fossils to learn about the traits of ancient organisms. Often, scientists compare fossils to modern organisms.
Some ancient organisms had many traits in common with modern organisms. Other ancient organisms were very different from any organis... | The Japanese sea lily has feather-like arms and a long stem.
This fossil shows the remains of feather-like arms. So, Hapalocrinus had feather-like arms.
The fossil also shows the remains of a long stem. So, Hapalocrinus had a long stem.
Choice "The Japanese sea lily has feather-like arms, and so did Hapalocrinus." is i... |
train/3253 | What is the capital of South Carolina? | [
"Columbia",
"Frankfort",
"Huntington",
"Charleston"
] | 0 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the Southeast | Columbia is the capital of South Carolina. | ||
train/3254 | Which property do these two objects have in common? | [
"yellow",
"breakable"
] | 1 | Select the better answer. | closed choice | grade2 | natural science | physics | Materials | Compare properties of objects | An object has different properties. A property of an object can tell you how it looks, feels, tastes, or smells.
Different objects can have the same properties. You can use these properties to put objects into groups. | Look at each object.
For each object, decide if it has that property.
A breakable object will break into pieces if you drop it. Both objects are breakable.
Yellow is a color.
This color is yellow. Neither of the objects are yellow.
The property that both objects have in common is breakable. |
train/3255 | Which of the following fossils is older? Select the more likely answer. | [
"dinosaur footprint",
"palm leaf"
] | 0 | This diagram shows fossils in an undisturbed sedimentary rock sequence. | closed choice | grade8 | natural science | earth-science | Fossils | Compare ages of fossils in a rock sequence | A fossil is the preserved evidence of an ancient organism. Some fossils are formed from body parts such as bones or shells. Other fossils, such as footprints or burrows, are formed from traces of an organism's activities.
Fossils are typically found in sedimentary rocks. Sedimentary rocks usually form in layers. Over t... | Look again at the fossils in the rock sequence diagram.
Compare the positions of these fossils to determine which one is older:
The dinosaur footprint fossil is in a deeper layer in the rock sequence than the palm leaf fossil. So, the dinosaur footprint fossil is most likely older than the palm leaf fossil. |
train/3256 | Identify the question that William's experiment can best answer. | [
"Do steel nails rust in fewer days when submerged in a large volume of liquid compared to a small volume?",
"Do steel nails take fewer days to rust in water compared to vinegar?"
] | 1 | The passage below describes an experiment. Read the passage and then follow the instructions below.
William put one two-inch steel nail into each of six test tubes. He added water to three of the test tubes and vinegar to the other three. In each test tube, he completely covered the nail with the same volume of liquid... | closed choice | grade6 | 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... | |
train/3257 | Which bird's beak is also adapted to tear through meat? | [
"secretary bird",
"common goldeneye"
] | 0 | Bateleurs eat fish, mammals, and other birds. The shape of the 's beak is adapted to tear through meat.
Figure: bateleur. | 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 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 bateleur.
The bateleur has a sharp hooked beak. Its beak is adapted to tear through meat. The sharp hook can help the bateleur cut the meat into pieces it can swallow.
Now look at each bird. Figure out which bird has a similar adaptation.
The secretary bird has a sharp hooked beak. Its beak i... |
train/3258 | Which of these continents does the prime meridian intersect? | [
"Africa",
"North America",
"Asia"
] | 0 | closed choice | grade5 | social science | geography | Maps | Use lines of latitude and longitude | Lines of latitude and lines of longitude are imaginary lines drawn on some globes and maps. They can help you find places on globes and maps.
Lines of latitude show how far north or south a place is. We use units called degrees to describe how far a place is from the equator. The equator is the line located at 0° latit... | The prime meridian is the line at 0° longitude. It intersects Africa. It does not intersect North America or Asia. | |
train/3259 | Is a stone statue a solid, a liquid, or a gas? | [
"a gas",
"a solid",
"a liquid"
] | 1 | closed choice | grade3 | natural science | physics | States of matter | Classify matter as solid, liquid, or gas | Solid, liquid, and gas are states of matter. Matter is anything that takes up space. Matter can come in different states, or forms.
When matter is a solid, it has a definite volume and a definite shape. So, a solid has a size and shape of its own.
Some solids can be easily folded, bent, or broken. A piece of paper is a... | A stone statue is a solid. A solid has a size and shape of its own.
Stone statues are made of one or more pieces of rock. Each piece of rock has a size and shape of its own. | |
train/3260 | What is the name of the colony shown? | [
"Pennsylvania",
"New York",
"New Jersey",
"Kentucky"
] | 0 | closed choice | grade7 | social science | us-history | Colonial America | Identify the Thirteen Colonies | The colony is Pennsylvania. | ||
train/3261 | Which of these continents does the prime meridian intersect? | [
"Antarctica",
"Australia",
"South America"
] | 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 prime meridian is the line at 0° longitude. It intersects Antarctica. It does not intersect South America or Australia. | |
train/3262 | Is the following statement about our solar system true or false?
Half of the planets are made mainly of gas or ice. | [
"true",
"false"
] | 0 | 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. | The table tells you that of the eight planets, two are made mainly of gas and two are made mainly of ice. So, four of the eight, or half, of the planets are made mainly of gas or ice. |
train/3263 | Identify the question that Colette's experiment can best answer. | [
"Do slugs eat more from tomato leaves or broccoli leaves?",
"Do slugs weigh more after eating tomato leaves or broccoli leaves?"
] | 0 | The passage below describes an experiment. Read the passage and then follow the instructions below.
Colette cut tomato and broccoli plant leaves into one-inch squares. In each of 12 containers, she placed six leaf squares: three tomato-leaf squares and three broccoli-leaf squares. She put one slug from her garden into... | 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... | |
train/3264 | In this food chain, the alderfly nymph is a consumer. Why? | [
"It makes its own food.",
"It eats another organism."
] | 1 | This diagram shows a food chain from the River Frome, a freshwater ecosystem in England. | closed choice | grade4 | natural science | biology | Ecosystems | Identify roles in food chains | Every organism needs food to stay alive. Organisms get their food in different ways. A food chain shows how organisms in an ecosystem get their food.
Producers make their own food. Many producers use carbon dioxide, water, and sunlight to make sugar. This sugar is food for the producer.
Consumers eat other organisms. C... | In this food chain, the alderfly nymph is a consumer because it eats another organism. The alderfly nymph in this food chain eats the sludge worm. |
train/3265 | Complete the statement.
Rhenium is (). | [
"an elementary substance",
"a compound"
] | 0 | The model below represents rhenium. Rhenium is a rare and expensive metal used to make jet engines. | closed choice | grade8 | natural science | chemistry | Atoms and molecules | Classify 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 ... | Use the model to determine whether rhenium is an elementary substance or a compound.
Step 1: Interpret the model.
In the space-filling model shown above, all of the balls are the same color:
. The legend shows that dark blue represents the chemical element with the atomic symbol Re. So, the model shows you that rhenium... |
train/3266 | Identify the question that Abdul's experiment can best answer. | [
"Do steel nails rust in fewer days when submerged in a large volume of liquid compared to a small volume?",
"Do steel nails take fewer days to rust in water compared to vinegar?"
] | 1 | The passage below describes an experiment. Read the passage and then follow the instructions below.
Abdul put one two-inch steel nail into each of six test tubes. He added water to three of the test tubes and vinegar to the other three. In each test tube, he completely covered the nail with the same volume of liquid. ... | closed choice | grade8 | 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... | |
train/3267 | Based on the timeline, which statement is true? | [
"Americans boycotted British goods before the Revolutionary War began.",
"The Boston Massacre was the first battle of the Revolutionary War."
] | 0 | 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 | ||
train/3268 | Complete the text to describe the diagram.
Solute particles moved in both directions across the permeable membrane. But more solute particles moved across the membrane (). When there was an equal concentration on both sides, the particles reached equilibrium. | [
"to the right than to the left",
"to the left than to the right"
] | 0 | The diagram below shows a solution with one solute. Each solute particle is represented by a green ball. The solution fills a closed container that is divided in half by a membrane. The membrane, represented by a dotted line, is permeable to the solute particles.
The diagram shows how the solution can change over time ... | closed choice | grade6 | natural science | chemistry | Solutions | Diffusion across membranes | In a solution, solute particles move and spread throughout the solvent. The diagram below shows how a solution can change over time. Solute particles move from the area where they are at a higher concentration to the area where they are at a lower concentration. This movement happens through the process of diffusion.
A... | Look at the diagram again. It shows you how the solution changed during the process of diffusion.
Before the solute particles reached equilibrium, there were 6 solute particles on the left side of the membrane and 2 solute particles on the right side of the membrane.
When the solute particles reached equilibrium, there... |
train/3269 | Which is this organism's scientific name? | [
"red-eyed tree frog",
"Agalychnis callidryas"
] | 1 | This organism is Agalychnis callidryas. It is also called a red-eyed tree frog. | closed choice | grade7 | natural science | biology | Classification and scientific names | Identify common and scientific names | An organism's common name is the name that people normally call the organism. Common names often contain words you know.
An organism's scientific name is the name scientists use to identify the organism. Scientific names often contain words that are not used in everyday English.
Scientific names are written in italics,... | Agalychnis callidryas is written in italics. The first word is capitalized, and the second word is not.
So, Agalychnis callidryas is the scientific name. |
train/3270 | What type of rock is obsidian? | [
"sedimentary",
"igneous",
"metamorphic"
] | 1 | This is a piece of obsidian. Do you see the smooth, glassy surfaces of this rock?
Obsidian forms when melted rock cools very quickly. The rock is usually black, brown, or tan in color. Some pieces of obsidian contain swirls of two or more colors. | closed choice | grade7 | 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, or compacted, to make rock. This type of change occurs below Earth's surface.
Metamorphic rock is formed when ... | Obsidian is an igneous rock. Like other igneous rocks, it forms when melted rock cools and hardens.
Melted rock at the earth's surface is called lava. Obsidian forms when lava cools very quickly. The cooling is so quick that the minerals do not have time to form grains. This is why obsidian looks glassy. |
train/3271 | What can Gina and Jeremiah trade to each get what they want? | [
"Gina can trade her tomatoes for Jeremiah's broccoli.",
"Gina can trade her tomatoes for Jeremiah's carrots.",
"Jeremiah can trade his almonds for Gina's tomatoes.",
"Jeremiah can trade his broccoli for Gina's oranges."
] | 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.
Gina and Jeremiah open their lunch boxes in the school cafeteria. Neither Gina nor Jeremiah got everything that they wanted. The ... | closed choice | grade7 | social science | economics | Basic economic principles | Trade and specialization | Look at the table and images.
Gina wants broccoli. Jeremiah 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. | |
train/3272 | Identify the question that Judith's experiment can best answer. | [
"Do the temperatures inside boxes depend on the sizes of the boxes?",
"Do the insides of white boxes get hotter than the insides of black boxes when the boxes are left in the sun?"
] | 1 | The passage below describes an experiment. Read the passage and then follow the instructions below.
Judith glued lids onto 16 cardboard shoe boxes of equal size. She painted eight of the boxes black and eight of the boxes white. Judith made a small hole in the side of each box and then stuck a thermometer partially in... | closed choice | grade8 | 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... | |
train/3273 | What is the capital of Utah? | [
"Salt Lake City",
"Topeka",
"Provo",
"Denver"
] | 0 | closed choice | grade3 | social science | geography | State capitals | Identify the 50 state capitals | Salt Lake City is the capital of Utah. | ||
train/3274 | Identify the question that Carrie's experiment can best answer. | [
"Do radishes grown under bright light get bigger than radishes grown under dim light?",
"Do radish plants grown under bright light have more leaves than radish plants grown under dim light?"
] | 0 | The passage below describes an experiment. Read the passage and then follow the instructions below.
Carrie planted 20 radish plants in a greenhouse, putting each plant in its own pot. She placed ten of the pots under bright light and the other ten pots under dim light. Carrie watered all the plants twice a day. After ... | 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... | |
train/3275 | Which of these colonies was Middle Colonies? | [
"New York",
"Georgia",
"North Carolina"
] | 0 | In the following questions, you will learn about the origins of the Middle Colonies. The Middle Colonies made up the middle part of the Thirteen Colonies, which were ruled by England in the 1600s and 1700s. The map below shows the Thirteen Colonies in 1750. Look at the map. Then answer the question below. | closed choice | grade7 | social science | us-history | Colonial America | Middle Colonies: founding and government | Look at the legend on the map.
The rest of the Thirteen Colonies were part of New England or the Southern Colonies. | |
train/3276 | What is the name of the colony shown? | [
"Georgia",
"New York",
"Maryland",
"Iowa"
] | 0 | closed choice | grade5 | social science | us-history | English colonies in North America | Identify the Thirteen Colonies | The colony is Georgia. | ||
train/3277 | Which of the following was a dependent variable in this experiment? | [
"the type of flour used",
"the volume of the cupcakes"
] | 1 | The passage below describes an experiment. Read the passage and think about the variables that are described.
Harold was baking cupcakes for his stepfather's birthday. Harold wondered whether the volume of a cupcake would be affected by the type of flour in the batter.
Harold bought three types of flour and made three... | 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... | |
train/3278 | Which bird's beak is also adapted to get nectar out of long flowers? | [
"puffin",
"Allen's hummingbird"
] | 1 | Violet sabrewings live in the forests of Central America. The shape of the 's beak is adapted to get nectar out of long flowers.
Figure: violet sabrewing. | 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 violet sabrewing.
The violet sabrewing has a long, thin beak. Its beak is adapted to get nectar out of long flowers. The violet sabrewing's long, thin beak can reach deep into the flowers.
Now look at each bird. Figure out which bird has a similar adaptation.
The Allen's hummingbird has a lon... |
train/3279 | Which of these states is farthest north? | [
"New Mexico",
"Arkansas",
"California",
"Idaho"
] | 3 | closed choice | grade5 | social science | geography | Maps | Read a map: cardinal directions | Maps have four cardinal directions, or main directions. Those directions are north, south, east, and west.
A compass rose is a set of arrows that point to the cardinal directions. A compass rose usually shows only the first letter of each cardinal direction.
The north arrow points to the North Pole. On most maps, north... | To find the answer, look at the compass rose. Look at which way the north arrow is pointing. Idaho is farthest north. | |
train/3280 | 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 smaller in Pair 2.",
"The magnitude of the magnetic force is smaller in Pair 1."
] | 2 | The images below show two pairs of magnets. The magnets in different pairs do not affect each other. All the magnets shown are made of the same material, but some of them are different shapes. | closed choice | grade6 | natural science | physics | Velocity, acceleration, and forces | Compare magnitudes of magnetic forces | Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart. These pulls and pushes between magnets are called magnetic forces.
The strength of a force is called its magnitude. The greater the magnitude of the magnetic force between two magnets,... | The magnets in Pair 1 attract. The magnets in Pair 2 repel. But whether the magnets attract or repel affects only the direction of the magnetic force. It does not affect the magnitude of the magnetic force.
Distance affects the magnitude of the magnetic force. When there is a greater distance between magnets, the magni... |
train/3281 | What is the capital of Massachusetts? | [
"Davenport",
"Raleigh",
"Boston",
"Cambridge"
] | 2 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the Northeast | Boston is the capital of Massachusetts. | ||
train/3282 | Which better describes the Great Victoria Desert ecosystem? | [
"It has dry, thin soil. It also has only a few types of organisms.",
"It has a small amount of rain. It also has many different types of organisms."
] | 1 | Figure: Great Victoria Desert.
The Great Victoria Desert is a desert ecosystem in southern Australia. | closed choice | grade3 | natural science | biology | Ecosystems | Describe ecosystems | An ecosystem is formed when living and nonliving things interact in an environment. There are many types of ecosystems. Here are some ways in which ecosystems can differ from each other:
the pattern of weather, or climate
the type of soil or water
the organisms that live there | A desert is a type of ecosystem. Deserts have the following features: a small amount of rain, dry, thin soil, and many different types of organisms. So, the Great Victoria Desert has a small amount of rain. It also has many different types of organisms. |
train/3283 | What can Britney and Devon trade to each get what they want? | [
"Britney can trade her tomatoes for Devon's broccoli.",
"Devon can trade her broccoli for Britney's oranges.",
"Britney can trade her tomatoes for Devon's sandwich.",
"Devon can trade her almonds for Britney's tomatoes."
] | 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.
Britney and Devon open their lunch boxes in the school cafeteria. Both of them could be happier with their lunches. Britney wante... | closed choice | grade6 | social science | economics | Basic economic principles | Trade and specialization | Britney wanted broccoli in her lunch and Devon was hoping for tomatoes. Look at the labeled part of the images.
Britney has tomatoes. Devon 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. | |
train/3284 | Complete the sentence.
The mutation in the () affected the structure and function of the (). | [
"AcrB gene . . . AcrB protein",
"AcrB protein . . . AcrB gene"
] | 0 | The following passage describes the effects of a gene mutation, which is a permanent change in a gene. Read the passage and then follow the instructions below.
Antibiotics are substances that get inside bacterial cells and cause them to die. Doctors often use antibiotics to kill bacteria that cause infections, such as... | closed choice | grade6 | natural science | biology | Genes to traits | Describe the effects of gene mutations on organisms | An organism's genes contain information about its proteins. Each gene encodes, or contains the instructions for making, one protein or a group of proteins.
A permanent change in a gene is called a mutation. Because a mutation changes a gene, the mutation may change the structure of the protein encoded by that gene.
The... | A mutation in a gene may affect the protein it encodes.
So, the mutation in the AcrB gene affected the structure and function of the AcrB protein. |
train/3285 | Select the organism in the same genus as the silver gull. | [
"Caprimulgus macrurus",
"Polysticta stelleri",
"Chroicocephalus scopulinus"
] | 2 | This organism is a silver gull. Its scientific name is Chroicocephalus novaehollandiae. | closed choice | grade6 | natural science | biology | Classification and scientific names | Use scientific names to classify organisms | Scientists use scientific names to identify organisms. Scientific names are made of two words.
The first word in an organism's scientific name tells you the organism's genus. A genus is a group of organisms that share many traits.
A genus is made up of one or more species. A species is a group of very similar organisms... | A silver gull's scientific name is Chroicocephalus novaehollandiae. The first word of its scientific name is Chroicocephalus.
Caprimulgus macrurus is in the genus Caprimulgus. The first word of its scientific name is Caprimulgus. So, Caprimulgus macrurus and Chroicocephalus novaehollandiae are not in the same genus.
Po... |
train/3286 | Which solution has a higher concentration of blue particles? | [
"Solution B",
"Solution A",
"neither; their concentrations are the same"
] | 1 | The diagram below is a model of two solutions. Each blue ball represents one particle of solute. | closed choice | grade7 | natural science | chemistry | Solutions | Compare concentrations of solutions | A solution is made up of two or more substances that are completely mixed. In a solution, solute particles are mixed into a solvent. The solute cannot be separated from the solvent by a filter. For example, if you stir a spoonful of salt into a cup of water, the salt will mix into the water to make a saltwater solution... | In Solution A and Solution B, the 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.
... |
train/3287 | Which of the following could Barry's test show? | [
"the amount of bacteria in the water before it was filtered",
"whether the filter was clogged",
"whether an inexpensive filter would become clogged more often"
] | 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... | |
train/3288 | What is the capital of Connecticut? | [
"New Haven",
"Pierre",
"Olympia",
"Hartford"
] | 3 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the Northeast | Hartford is the capital of Connecticut. | ||
train/3289 | What is the capital of Wisconsin? | [
"Milwaukee",
"Green Bay",
"Grand Rapids",
"Madison"
] | 3 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the Midwest | Madison is the capital of Wisconsin. | ||
train/3290 | Is peridotite a mineral or a rock? | [
"mineral",
"rock"
] | 1 | Peridotite has the following properties:
not made by living things
solid
no fixed crystal structure
coarse-grained texture
naturally occurring
not a pure substance | closed choice | grade8 | natural science | earth-science | Rocks and minerals | Identify rocks and minerals | Minerals are the building blocks of rocks. A rock can be made of one or more minerals.
Minerals and rocks have the following properties:
Property | Mineral | Rock
It is a solid. | Yes | Yes
It is formed in nature. | Yes | Yes
It is not made by organisms. | Yes | Yes
It is a pure substance. | Yes | No
It has a fixed cry... | The properties of peridotite match the properties of a rock. So, peridotite is a rock. |
train/3291 | 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."
] | 0 | The images below show two pairs of magnets. The magnets in different pairs do not affect each other. All the magnets shown are made of the same material, but some of them are different shapes. | closed choice | grade6 | natural science | physics | Velocity, acceleration, and forces | Compare magnitudes of magnetic forces | Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart. These pulls and pushes between magnets are called magnetic forces.
The strength of a force is called its magnitude. The greater the magnitude of the magnetic force between two magnets,... | Both magnet sizes and distance affect the magnitude of the magnetic force. The sizes of the magnets in Pair 1 are the same as in Pair 2. The distance between the magnets is also the same.
So, the magnitude of the magnetic force is the same in both pairs. |
train/3292 | 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 2.",
"The magnitude of the magnetic force is greater in Pair 1."
] | 2 | The images below show two pairs of magnets. The magnets in different pairs do not affect each other. All the magnets shown are made of the same material, but some of them are different sizes and shapes. | closed choice | grade7 | natural science | physics | Velocity, acceleration, and forces | Compare magnitudes of magnetic forces | Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart. These pulls and pushes between magnets are called magnetic forces.
The strength of a force is called its magnitude. The greater the magnitude of the magnetic force between two magnets,... | The magnets in Pair 1 attract. The magnets in Pair 2 repel. But whether the magnets attract or repel affects only the direction of the magnetic force. It does not affect the magnitude of the magnetic force.
Magnet sizes affect the magnitude of the magnetic force. Imagine magnets that are the same shape and made of the ... |
train/3293 | What is the capital of Nevada? | [
"Helena",
"Reno",
"Carson City",
"Denver"
] | 2 | closed choice | grade3 | social science | geography | State capitals | Identify the 50 state capitals | Carson City is the capital of Nevada. | ||
train/3294 | Which property do these three objects have in common? | [
"hard",
"soft",
"yellow"
] | 1 | 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 hard object does not change shape when pressed or squeezed. None of the objects are hard.
A soft object changes shape when pressed or squeezed. All three objects are soft.
Yellow is a color.
This color is yellow. None of the objects are yellow.
The... |
train/3295 | Which of the following could Quinn's test show? | [
"if the new turbine could turn easily",
"whether the new turbine could produce 10% more electricity",
"how much the new turbine would weigh"
] | 1 | People can use the engineering-design process to develop solutions to problems. One step in the process is testing if a potential solution meets the requirements of the design.
The passage below describes how the engineering-design process was used to test a solution to a problem. Read the passage. Then answer the ques... | closed choice | grade7 | natural science | science-and-engineering-practices | Engineering practices | Evaluate tests of engineering-design solutions | People can use the engineering-design process to develop solutions to problems. One step in the process is testing if a potential solution meets the requirements of the design. How can you determine what a test can show? You need to figure out what was tested and what was measured.
Imagine an engineer needs to design a... | |
train/3296 | Does this passage describe the weather or the climate? | [
"weather",
"climate"
] | 0 | Figure: Kosice.
Kosice is a town in the European country of Slovakia. The sky in Kosice cleared this morning because a high pressure system moved over the town.
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.
Kosice is a town in the European country of Slovakia. The sky in Kosice cleared this morning because a high pressure system moved over the town.
The underlined part of the passage tells you about the barometric pressure in Kosice this morning. This passage describes the atmosphere at a certa... |
train/3297 | Select the organism in the same species as the domestic cat. | [
"Felis margarita",
"Pelecanus crispus",
"Felis catus"
] | 2 | 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.
Felis catus is in the same genus as Felis margarita, but they are not in the same species.
Organisms in the same species have the same scientific names. Felis catus and Felis margarita are different species within the same genus.
Pelecanus crispus does not have the same ... |
train/3298 | Which of the following could Ethan's test show? | [
"how much athletes would sweat in the fabric",
"how long it would take the sample fabric to dry after it absorbed one drop of water",
"if the sample fabric would absorb one drop of water in less than one second"
] | 1 | People can use the engineering-design process to develop solutions to problems. One step in the process is testing if a potential solution meets the requirements of the design.
The passage below describes how the engineering-design process was used to test a solution to a problem. Read the passage. Then answer the ques... | closed choice | grade7 | natural science | science-and-engineering-practices | Engineering practices | Evaluate tests of engineering-design solutions | People can use the engineering-design process to develop solutions to problems. One step in the process is testing if a potential solution meets the requirements of the design. How can you determine what a test can show? You need to figure out what was tested and what was measured.
Imagine an engineer needs to design a... | |
train/3299 | 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"
] | 1 | The diagrams below show two pure samples of gas in identical closed, rigid containers. Each colored ball represents one gas particle. Both samples have the same number of particles. | closed choice | grade8 | natural science | physics | Particle motion and energy | Identify how particle motion affects temperature and pressure | The temperature of a substance depends on the average kinetic energy of the particles in the substance. The higher the average kinetic energy of the particles, the higher the temperature of the substance.
The kinetic energy of a particle is determined by its mass and speed. For a pure substance, the greater the mass of... | Each particle in sample A has more mass than each particle in sample B. The particles in sample A also have a higher average speed than the particles in sample B. So, the particles in sample A have a higher average kinetic energy than the particles in sample B.
Because the particles in sample A have the higher average ... |
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