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train/4600 | What is the capital of Idaho? | [
"Salem",
"Santa Fe",
"Nampa",
"Boise"
] | 3 | closed choice | grade5 | social science | geography | State capitals | Identify the 50 state capitals | Boise is the capital of Idaho. | ||
train/4601 | Which property do these four objects have in common? | [
"fragile",
"salty",
"shiny"
] | 2 | 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.
Potato chips have a salty taste. The trombone is not salty.
A fragile object will break into pieces if you drop it. The gold ring and the sapphire are not fragile.
A shiny object reflects a lot of light. You can usually see your reflection in a shiny... |
train/4602 | Select the organism in the same genus as the mantled howler. | [
"Alouatta palliata",
"Lontra canadensis",
"Hystrix cristata"
] | 0 | This organism is a mantled howler. Its scientific name is Alouatta palliata. | 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 mantled howler's scientific name is Alouatta palliata. The first word of its scientific name is Alouatta.
Lontra canadensis is in the genus Lontra. The first word of its scientific name is Lontra. So, Lontra canadensis and Alouatta palliata are not in the same genus.
Hystrix cristata is in the genus Hystrix. The firs... |
train/4603 | Which property do these two objects have in common? | [
"scratchy",
"blue"
] | 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 scratchy object is rough and itchy against your skin. The slippers are not scratchy.
Blue is a color.
This color is blue. Both objects are blue.
The property that both objects have in common is blue. |
train/4604 | Select the mammal below. | [
"Galapagos giant tortoise",
"zebra"
] | 1 | Mammals have hair or fur and feed their young milk. A koala is an example of a mammal. | 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 zebra is a mammal. It has hair and feeds its young milk.
Zebras eat mostly grass. But they sometimes eat other types of plants, such as shrubs or tree bark.
A Galapagos giant tortoise is a reptile. It has scaly, waterproof skin.
Galapagos tortoises live on the Galapagos Islands in the Pacific Ocean. They can live to ... |
train/4605 | Which property matches this object? | [
"rough",
"fuzzy"
] | 1 | Select the better answer. | closed choice | grade3 | natural science | physics | Materials | Identify properties of an object | An object has different properties. A property of an object can tell you how it looks, feels, tastes, or smells. Properties can also tell you how an object will behave when something happens to it. | Look at the object.
Think about each property.
A rough object feels scratchy when you touch it. The tennis ball is not rough.
A fuzzy object is covered in soft hair. The tennis ball is fuzzy. |
train/4606 | Think about the magnetic force between the magnets in each pair. Which of the following statements is true? | [
"The magnitude of the magnetic force is greater in Pair 2.",
"The magnitude of the magnetic force is the same in both pairs.",
"The magnitude of the magnetic force is greater in Pair 1."
] | 0 | The images below show two pairs of magnets. The magnets in different pairs do not affect each other. All the magnets shown are made of the same material. | closed choice | grade5 | natural science | physics | Magnets | 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 smaller distance between magnets, the magni... |
train/4607 | Which country is highlighted? | [
"Solomon Islands",
"Vanuatu",
"the Federated States of Micronesia",
"the Marshall Islands"
] | 0 | closed choice | grade8 | social science | geography | Oceania: geography | Identify and select countries of Oceania | This country is Solomon Islands. | ||
train/4608 | Think about the magnetic force between the magnets in each pair. Which of the following statements is true? | [
"The magnetic force is weaker in Pair 1.",
"The strength of the magnetic force is the same in both pairs.",
"The magnetic force is weaker 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. | closed choice | grade3 | natural science | physics | Magnets | Compare strengths of magnetic forces | Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart.
These pulls and pushes between magnets are called magnetic forces. The stronger the magnetic force between two magnets, the more strongly the magnets attract or repel each other.
You c... | Distance affects the strength of the magnetic force. When magnets are farther apart, the magnetic force between them is weaker.
The magnets in Pair 1 are farther apart than the magnets in Pair 2. So, the magnetic force is weaker in Pair 1 than in Pair 2. |
train/4609 | Which animal is also adapted to be camouflaged in a sandy desert? | [
"blue poison dart frog",
"flat-tail horned lizard"
] | 1 | Camels live in dry places such as deserts. The is adapted to be camouflaged in a sandy desert.
Figure: camel. | closed choice | grade5 | natural science | biology | Adaptations | Animal adaptations: skins and body coverings | An adaptation is an inherited trait that helps an organism survive or reproduce. Adaptations can include both body parts and behaviors.
The color, texture, and covering of an animal's skin are examples of adaptations. Animals' skins can be adapted in different ways. For example, skin with thick fur might help an animal... | Look at the picture of the camel.
The camel has sand-colored fur covering its skin. It is adapted to be camouflaged in a sandy desert. The word camouflage means to blend in.
Now look at each animal. Figure out which animal has a similar adaptation.
The flat-tail horned lizard has sand-colored scales covering its body. ... |
train/4610 | Identify the question that Victoria and Nick's experiment can best answer. | [
"Does Victoria's snowboard slide down a hill in less time when it has a layer of wax or when it does not have a layer of wax?",
"Does Victoria's snowboard slide down a hill in less time when it has a thin layer of wax or a thick layer of wax?"
] | 0 | The passage below describes an experiment. Read the passage and then follow the instructions below.
Victoria applied a thin layer of wax to the underside of her snowboard and rode the board straight down a hill. Then, she removed the wax and rode the snowboard straight down the hill again. She repeated the rides four ... | 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/4611 | Compare the average kinetic energies of the particles in each sample. Which sample has the higher temperature? | [
"sample B",
"sample A",
"neither; the samples have the same temperature"
] | 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... | Each particle in sample B has more mass than each particle in sample A. The particles in sample B also have a higher average speed than the particles in sample A. So, the particles in sample B have a higher average kinetic energy than the particles in sample A.
Because the particles in sample B have the higher average ... |
train/4612 | Which animal's legs are also adapted for wading? | [
"African penguin",
"gray heron"
] | 1 | Flamingos live near marshes, rivers, and oceans. They eat small crustaceans that live in shallow water. Flamingos get their food by walking through water, or wading.
The 's legs are adapted for wading. They are lightweight and keep the bird's body above the water.
Figure: flamingo. | closed choice | grade5 | natural science | biology | Adaptations | Animal adaptations: feet and limbs | An adaptation is an inherited trait that helps an organism survive or reproduce. Adaptations can include both body parts and behaviors.
Arms, legs, flippers, and wings are different types of limbs. The type of limbs an animal has is an example of an adaptation. Animals' limbs can be adapted in different ways. For examp... | Look at the picture of the flamingo.
Long legs help the flamingo keep its body above the surface of the water while wading. Thin legs are easier to move through the water.
Now look at each animal. Figure out which animal has a similar adaptation.
The gray heron has long, thin legs. Its legs are adapted for wading.
The ... |
train/4613 | Think about the magnetic force between the magnets in each pair. Which of the following statements is true? | [
"The magnetic force is weaker in Pair 2.",
"The magnetic force is weaker in Pair 1.",
"The strength of the magnetic force is the same in both pairs."
] | 1 | The images below show two pairs of magnets. The magnets in different pairs do not affect each other. All the magnets shown are made of the same material. | closed choice | grade4 | natural science | physics | Magnets | Compare strengths of magnetic forces | Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart.
These pulls and pushes between magnets are called magnetic forces. The stronger the magnetic force between two magnets, the more strongly the magnets attract or repel each other.
You c... | Distance affects the strength of the magnetic force. When magnets are farther apart, the magnetic force between them is weaker.
The magnets in Pair 1 are farther apart than the magnets in Pair 2. So, the magnetic force is weaker in Pair 1 than in Pair 2. |
train/4614 | What is the capital of Arkansas? | [
"Little Rock",
"Oklahoma City",
"Austin",
"Fayetteville"
] | 0 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the Southeast | Little Rock is the capital of Arkansas. | ||
train/4615 | Select the organism in the same genus as the Grevy's zebra. | [
"Macropus giganteus",
"Equus zebra",
"Macropus rufus"
] | 1 | This organism is a Grevy's zebra. Its scientific name is Equus grevyi. | 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 Grevy's zebra's scientific name is Equus grevyi. The first word of its scientific name is Equus.
Macropus rufus is in the genus Macropus. The first word of its scientific name is Macropus. So, Macropus rufus and Equus grevyi are not in the same genus.
Equus zebra is in the genus Equus. The first word of its scientifi... |
train/4616 | Is the following statement about our solar system true or false?
The volume of Saturn is more than ten times the volume of Uranus. | [
"false",
"true"
] | 1 | Use the data to answer the question below. | true-or false | grade8 | natural science | earth-science | Astronomy | Analyze data to compare properties of planets | A planet's volume tells you the size of the planet.
The primary composition of a planet is what the planet is made mainly of. In our solar system, planets are made mainly of rock, gas, or ice.
The volume of a planet is a very large quantity. Large quantities such as this are often written in scientific notation.
For ex... | To determine if this statement is true, calculate the value of ten times the volume of Uranus.
Then compare the result to the volume of Saturn. The volume of Saturn is 8.27 x 10^14 km^3, which is greater than 6.83 x 10^14 km^3. So, the volume of Saturn is more than ten times the volume of Uranus. |
train/4617 | What is the name of the colony shown? | [
"Rhode Island",
"Massachusetts",
"Connecticut",
"New Hampshire"
] | 2 | closed choice | grade7 | social science | us-history | Colonial America | Identify the Thirteen Colonies | The colony is Connecticut. | ||
train/4618 | What is the capital of Idaho? | [
"Nampa",
"Madison",
"Boise",
"Denver"
] | 2 | closed choice | grade5 | social science | geography | State capitals | Identify the 50 state capitals | Boise is the capital of Idaho. | ||
train/4619 | Which property do these four objects have in common? | [
"rough",
"salty",
"transparent"
] | 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.
You can see clearly through a transparent object. The pretzel, the cracker, and the potato chips are not transparent.
Potato chips have a salty taste. All four objects are salty.
A rough object feels scratchy when you touch it. The cracker and the po... |
train/4620 | What is the name of the colony shown? | [
"Delaware",
"New York",
"New Jersey",
"Pennsylvania"
] | 0 | closed choice | grade4 | social science | us-history | English colonies in North America | Identify the Thirteen Colonies | The colony is Delaware. | ||
train/4621 | Select the reptile below. | [
"Chinese alligator",
"American bullfrog"
] | 0 | Reptiles have scaly, waterproof skin. Most reptiles live on land. A coral snake is an example of a reptile. | 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. | An American bullfrog is an amphibian. It has moist skin and begins its life in water.
Frogs live near water or in damp places. Most frogs lay their eggs in water.
A Chinese alligator is a reptile. It has scaly, waterproof skin.
Alligators live in and around water. They can live near ponds, rivers, marshes, and lakes. |
train/4622 | Compare the average kinetic energies of the particles in each sample. Which sample has the higher temperature? | [
"neither; the samples have the same temperature",
"sample A",
"sample B"
] | 2 | The diagrams below show two pure samples of gas in identical closed, rigid containers. Each colored ball represents one gas particle. Both samples have the same number of particles. | closed choice | grade7 | 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... |
train/4623 | Which of these states is farthest west? | [
"South Carolina",
"Nebraska",
"Rhode Island",
"New Hampshire"
] | 1 | 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. Nebraska is farthest west. | |
train/4624 | What is the name of the colony shown? | [
"New York",
"South Carolina",
"Virginia",
"West Virginia"
] | 2 | closed choice | grade5 | social science | us-history | English colonies in North America | Identify the Thirteen Colonies | The colony is Virginia.
The Virginia Colony included land that would later become part of the state of West Virginia. West Virginia was never its own colony. | ||
train/4625 | Select the true statement. | [
"Eye color is an example of a gene.",
"All organisms have genes."
] | 1 | Look at the image and read the text. Then, answer the question.
variation in the human eye color trait
All organisms inherit certain traits from their parents. Information about these inherited traits is found in genes. Genes are pieces of hereditary material that are passed from parents to offspring. An organism's gen... | closed choice | grade6 | natural science | biology | Genes to traits | Genes, proteins, and traits: understanding the genetic code | Genes are passed down from parents to offspring.
When an organism reproduces, it passes copies of its genes to its offspring. This is how information about inherited traits is passed down.
Eye color is an example of a gene.
An organism's eye color is affected by its genes. But eye color is not a gene. Eye color is a tr... | |
train/4626 | During this time, thermal energy was transferred from () to (). | [
"each refrigerator . . . the surroundings",
"the surroundings . . . each refrigerator"
] | 1 | Two identical refrigerators in a restaurant kitchen lost power. The door of one fridge was slightly open, and the door of the other fridge was closed. This table shows how the temperature of each refrigerator changed over 10minutes. | closed choice | grade7 | natural science | physics | Thermal energy | Compare thermal energy transfers | A change in an object's temperature indicates a change in the object's thermal energy:
An increase in temperature shows that the object's thermal energy increased. So, thermal energy was transferred into the object from its surroundings.
A decrease in temperature shows that the object's thermal energy decreased. So, th... | The temperature of each refrigerator increased, which means that the thermal energy of each refrigerator increased. So, thermal energy was transferred from the surroundings to each refrigerator. |
train/4627 | Complete the statement.
Calcium is (). | [
"a compound",
"an elementary substance"
] | 1 | The model below represents calcium. lcium is a metal found in substances that make up your teeth and bones. | 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 calcium 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 green represents the chemical element with the atomic symbol Ca. So, the model shows you that calcium is ... |
train/4628 | Which specific humidity level was measured within the outlined area shown? | [
"16 grams of water vapor per kilogram of air",
"23 grams of water vapor per kilogram of air",
"14 grams of water vapor per kilogram of air"
] | 1 | The map below shows humidity in the lower atmosphere on April 9, 2016. The map shows specific humidity, a measurement of the amount of water vapor in the air. The outlined area shows an air mass that influenced weather in Africa on that day.
Look at the map. Then, answer the question below.
Data source: United States N... | closed choice | grade7 | natural science | earth-science | Weather and climate | Identify and compare air masses | To study air masses, scientists can use maps that show conditions within Earth's atmosphere. For example, the map below uses color to show specific humidity, a measurement of the amount of water vapor in the air.
The map's legend tells you the specific humidity level that each color represents. Colors on the left in th... | Look at the colors shown within the outlined area. Then, use the legend to determine which specific humidity levels those colors represent.
The legend tells you that this air mass contained air with specific humidity levels between 20 and 24 grams of water vapor per kilogram of air.
23 grams of water vapor per kilogram... |
train/4629 | Which month is the coolest on average in Detroit? | [
"November and December",
"January and February",
"March and April"
] | 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 Detroit, look at the graph.
Choice "Feb" is incorrect.
Choice "Mar" is incorrect.
Choice "Apr" is incorrect.
Choice "Nov" is incorrect.
Choice "Dec" is incorrect.
Choice "Jan" is incorrect.
The average temperatures in January and February are between 25°F and 30°F. These mo... |
train/4630 | Think about the magnetic force between the magnets in each pair. Which of the following statements is true? | [
"The strength of the magnetic force is the same in both pairs.",
"The magnetic force is weaker in Pair 2.",
"The magnetic force is weaker 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. | closed choice | grade3 | natural science | physics | Magnets | Compare strengths of magnetic forces | Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart.
These pulls and pushes between magnets are called magnetic forces. The stronger the magnetic force between two magnets, the more strongly the magnets attract or repel each other.
You c... | Distance affects the strength of the magnetic force. When magnets are farther apart, the magnetic force between them is weaker.
The magnets in Pair 1 are farther apart than the magnets in Pair 2. So, the magnetic force is weaker in Pair 1 than in Pair 2. |
train/4631 | What is the capital of Tennessee? | [
"Salt Lake City",
"Montgomery",
"Tallahassee",
"Nashville"
] | 3 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the Southeast | Nashville is the capital of Tennessee. | ||
train/4632 | Select the organism in the same species as the black-blotched porcupinefish. | [
"Amphiprion perideraion",
"Diodon liturosus",
"Chelmon rostratus"
] | 1 | This organism is a black-blotched porcupinefish. Its scientific name is Diodon liturosus. | closed choice | grade7 | natural science | biology | Classification and scientific names | Use scientific names to classify organisms | Scientists use scientific names to identify organisms. Scientific names are made of two words.
The first word in an organism's scientific name tells you the organism's genus. A genus is a group of organisms that share many traits.
A genus is made up of one or more species. A species is a group of very similar organisms... | A black-blotched porcupinefish's scientific name is Diodon liturosus.
Diodon liturosus has the same scientific name as a black-blotched porcupinefish. So, these organisms are in the same species.
Amphiprion perideraion does not have the same scientific name as a black-blotched porcupinefish. So, Diodon liturosus and Am... |
train/4633 | Which continent is highlighted? | [
"Australia",
"South America",
"Asia",
"Europe"
] | 3 | closed choice | grade4 | 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 Europe. | |
train/4634 | What is the name of the colony shown? | [
"Massachusetts",
"Florida",
"New Jersey",
"Michigan"
] | 0 | closed choice | grade5 | social science | us-history | English colonies in North 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. | ||
train/4635 | Which animal is also adapted to be camouflaged in the snow? | [
"camel",
"Arctic hare"
] | 1 | Short-tailed weasels live in cold, snowy areas in Europe. The short tailed weasel is adapted to be camouflaged in the snow.
Figure: short-tailed weasel. | 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 short-tailed weasel.
During the winter, the short-tailed weasel has white fur covering its body. It is adapted to be camouflaged in the snow. The word camouflage means to blend in.
Now look at each animal. Figure out which animal has a similar adaptation.
During the winter, the Arctic hare ha... |
train/4636 | What is the capital of California? | [
"Knoxville",
"San Francisco",
"Columbus",
"Sacramento"
] | 3 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the West | Sacramento is the capital of California. | ||
train/4637 | What is the expected ratio of offspring with straight ears to offspring with curled ears? Choose the most likely ratio. | [
"4:0",
"0:4",
"2:2",
"3:1",
"1:3"
] | 0 | In a group of American curl cats, some individuals have curled ears and others have straight ears. In this group, the gene for the ear type trait has two alleles. The allele for straight ears (e) is recessive to the allele for curled ears (E).
This Punnett square shows a cross between two American curl cats. | 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 straight ears or curled ears, consider whether each phenotype is the dominant or recessive allele's version of the ear type trait. The question tells you that the e allele, which is for straight ears, is recessive to the E allele, which is for c... |
train/4638 | Think about the magnetic force between the magnets in each pair. Which of the following statements is true? | [
"The magnetic force is weaker in Pair 1.",
"The magnetic force is weaker in Pair 2.",
"The strength 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. | closed choice | grade4 | natural science | physics | Magnets | Compare strengths of magnetic forces | Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart.
These pulls and pushes between magnets are called magnetic forces. The stronger the magnetic force between two magnets, the more strongly the magnets attract or repel each other.
You c... | Distance affects the strength of the magnetic force. When magnets are farther apart, the magnetic force between them is weaker.
The magnets in Pair 1 are farther apart than the magnets in Pair 2. So, the magnetic force is weaker in Pair 1 than in Pair 2. |
train/4639 | Think about the magnetic force between the magnets in each pair. Which of the following statements is true? | [
"The magnetic force is stronger in Pair 2.",
"The strength of the magnetic force is the same in both pairs.",
"The magnetic force is stronger 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. | closed choice | grade4 | natural science | physics | Magnets | Compare strengths of magnetic forces | Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart.
These pulls and pushes between magnets are called magnetic forces. The stronger the magnetic force between two magnets, the more strongly the magnets attract or repel each other.
You c... | Distance affects the strength of the magnetic force. When magnets are closer together, the magnetic force between them is stronger.
The magnets in Pair 1 are closer together than the magnets in Pair 2. So, the magnetic force is stronger in Pair 1 than in Pair 2. |
train/4640 | As Sparky pulls on the leash, what is the direction of the opposing force? | [
"backward",
"forward"
] | 0 | The text below describes a pair of opposing forces. Opposing forces act on an object in opposite directions. Read the text. Then answer the question below.
Jill and her dog, Sparky, are stopped while on a walk. Sparky sees a squirrel and tugs on his leash. Think about two of the forces that act on the leash:
Sparky pul... | closed choice | grade3 | natural science | physics | Force and motion | How do balanced and unbalanced forces affect motion? | A force is a push or a pull that acts on an object. Each force acts on an object in a certain direction. If two forces act on an object in opposite directions, they are called opposing forces. | Find the direction Sparky pulls on the leash.
Jill and her dog, Sparky, are stopped while on a walk. Sparky sees a squirrel and tugs on his leash. Think about two of the forces that act on the leash:
Sparky pulls forward.
Jill pulls backward.
The text tells you that Sparky pulls forward. The opposite direction is backw... |
train/4641 | 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 the same in both pairs.",
"The magnitude of the magnetic force is smaller in Pair 1."
] | 0 | The images below show two pairs of magnets. The magnets in different pairs do not affect each other. All the magnets shown are made of the same material, but some of them are different sizes. | closed choice | grade5 | natural science | physics | Magnets | 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/4642 | Which of the following could Tina's test show? | [
"whether she added enough nutrients to help the bacteria produce 20% more insulin",
"whether producing more insulin would help the bacteria grow faster",
"whether different types of bacteria would need different nutrients to produce insulin"
] | 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 | 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/4643 | What is the name of the colony shown? | [
"Connecticut",
"Pennsylvania",
"North Carolina",
"Delaware"
] | 3 | closed choice | grade5 | social science | us-history | English colonies in North America | Identify the Thirteen Colonies | The colony is Delaware. | ||
train/4644 | What is the name of the colony shown? | [
"Delaware",
"Georgia",
"New York",
"North Carolina"
] | 1 | closed choice | grade4 | social science | us-history | English colonies in North America | Identify the Thirteen Colonies | The colony is Georgia. | ||
train/4645 | Does this passage describe the weather or the climate? | [
"climate",
"weather"
] | 0 | Figure: Santa Barbara.
Santa Barbara is a city in California. Santa Barbara has warm temperatures in both the summer and the winter.
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.
Santa Barbara is a city in California. Santa Barbara has warm temperatures in both the summer and the winter.
The underlined part of the passage tells you about the usual temperature pattern in Santa Barbara. This passage does not describe what the weather is like on a particular day. So, th... |
train/4646 | When did the chimps stop being afraid of Jane? | [
"After she fed them.",
"After she dressed up like a chimp."
] | 0 | Read the passage about Jane Goodall and chimpanzees.
Jane Goodall is a scientist who worked with wild chimpanzees, or chimps. At first, the chimps were scared of Jane. But Jane got them to trust her. She started giving the chimps bananas! After that, the chimps trusted Jane. Some chimps even let Jane become part of the... | closed choice | grade2 | language science | reading-comprehension | Independent reading comprehension | Read and understand informational passages | Look at the passage. It tells you when the chimps stopped being afraid of Jane.
Jane Goodall is a scientist who worked with wild chimpanzees, or chimps. At first, the chimps were scared of Jane. But Jane got them to trust her. She started giving the chimps bananas! After that, the chimps trusted Jane. Some chimps even ... | |
train/4647 | Which better describes the tide pool ecosystems in Little Corona Beach? | [
"It has daily flooding and draining of seawater. It also has many different types of organisms.",
"It has no sunlight. It also has daily flooding and draining of seawater."
] | 0 | Figure: Little Corona Beach.
Little Corona Beach is in southern California. It has many tide pool ecosystems. | 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 tide pool is a type of ecosystem. Tide pool ecosystems have the following features: daily flooding and draining of seawater, water that is rich in nutrients, and many different types of organisms. So, the tide pool ecosystems in Little Corona Beach have daily flooding and draining of seawater. They also have many dif... |
train/4648 | Which material is this road made of? | [
"plastic",
"asphalt"
] | 1 | closed choice | grade3 | natural science | physics | Materials | Identify materials in objects | A material is a type of matter. Wood, glass, metal, and plastic are common materials. | Look at the picture of the road.
The road is made of asphalt.
Asphalt is a hard, black material used to make roads. To make a road, construction workers have to get the asphalt very hot. Asphalt is soft and sticky when it is very hot. When the asphalt cools, it makes a strong, smooth surface for cars to drive on. | |
train/4649 | Which solution has a higher concentration of yellow particles? | [
"Solution A",
"neither; their concentrations are the same",
"Solution B"
] | 0 | The diagram below is a model of two solutions. Each yellow 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 yellow particles represent the solute. To figure out which solution has a higher concentration of yellow particles, look at both the number of yellow particles and the volume of the solvent in each container.
Use the concentration formula to find the number of yellow particles per mill... |
train/4650 | What is the probability that a cat produced by this cross will be heterozygous for the agouti fur gene? | [
"4/4",
"1/4",
"0/4",
"2/4",
"3/4"
] | 2 | This passage describes the agouti fur trait in cats:
Agouti is a fur pattern that is found in many mammals, including cats. When a cat has agouti fur, each of its hairs has bands of different colors. These bands give the cat's coat a striped or swirled pattern. When a cat does not have agouti fur, each of its hairs is ... | closed choice | grade8 | natural science | biology | Genes to traits | Use Punnett squares to calculate probabilities of offspring types | Offspring genotypes: homozygous or heterozygous?
How do you determine whether an organism is homozygous or heterozygous for a gene? Look at the alleles in the organism's genotype for that gene.
An organism with two identical alleles for a gene is homozygous for that gene.
If both alleles are dominant, the organism is h... | |
train/4651 | Does this passage describe the weather or the climate? | [
"weather",
"climate"
] | 0 | Figure: windfarm off the coast of Denmark.
Wind turbines use energy from the wind to make electricity. The turbines were spinning especially fast in the high winds on Monday afternoon.
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.
Wind turbines use energy from the wind to make electricity. The turbines were spinning especially fast in the high winds on Monday afternoon.
The underlined part of the passage tells you about the wind speed off the coast of Denmark on Monday afternoon. This passage describes the atmosphere ... |
train/4652 | How many years passed between the United States entering World War II and Germany surrendering? | [
"six years",
"four years",
"eight years",
"two years"
] | 1 | Look at the timeline. Then answer the question. | closed choice | grade5 | social science | world-history | 20th century American history | World War II: global events | The United States entered World War II in 1941. Germany surrendered in 1945. Subtract 1941 from 1945.
Four years passed between the United States entering World War II and Germany surrendering. | |
train/4653 | What is the capital of Minnesota? | [
"Topeka",
"Fairbanks",
"Saint Paul",
"Indianapolis"
] | 2 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the Midwest | Saint Paul is the capital of Minnesota. | ||
train/4654 | Which solution has a higher concentration of green particles? | [
"neither; their concentrations are the same",
"Solution B",
"Solution A"
] | 0 | The diagram below is a model of two solutions. Each green ball represents one particle of solute. | closed choice | grade8 | natural science | chemistry | Solutions | Compare concentrations of solutions | A solution is made up of two or more substances that are completely mixed. In a solution, solute particles are mixed into a solvent. The solute cannot be separated from the solvent by a filter. For example, if you stir a spoonful of salt into a cup of water, the salt will mix into the water to make a saltwater solution... | In Solution A and Solution B, the green particles represent the solute. To figure out which solution has a higher concentration of green particles, look at both the number of green particles and the volume of the solvent in each container.
Use the concentration formula to find the number of green particles per millilit... |
train/4655 | Does this passage describe the weather or the climate? | [
"climate",
"weather"
] | 0 | Figure: Rainbow Falls in Hilo, Hawaii.
Hilo is a city on the island of Hawaii. Hilo is known for its lush landscapes and beautiful waterfalls. This city is close to the equator and the ocean. So, it gets lots of rain, and the temperature doesn't change much throughout the year.
Hint: Weather is what the atmosphere is l... | 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.
Hilo is a city on the island of Hawaii. Hilo is known for its lush landscapes and beautiful waterfalls. This city is close to the equator and the ocean. So, it gets lots of rain, and the temperature doesn't change much throughout the year.
The underlined part of the passage tells you about t... |
train/4656 | Which property do these three objects have in common? | [
"fragile",
"flexible",
"transparent"
] | 1 | Select the best answer. | closed choice | grade3 | natural science | physics | Materials | Compare properties of objects | An object has different properties. A property of an object can tell you how it looks, feels, tastes, or smells. Properties can also tell you how an object will behave when something happens to it.
Different objects can have properties in common. You can use these properties to put objects into groups. | Look at each object.
For each object, decide if it has that property.
A flexible object can be folded or bent without breaking easily. All three objects are flexible.
A fragile object will break into pieces if you drop it. None of the objects are fragile.
You can see clearly through a transparent object. None of the ob... |
train/4657 | Which solution has a higher concentration of pink particles? | [
"Solution A",
"neither; their concentrations are the same",
"Solution B"
] | 1 | The diagram below is a model of two solutions. Each pink 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 pink particles represent the solute. To figure out which solution has a higher concentration of pink particles, look at both the number of pink particles and the volume of the solvent in each container.
Use the concentration formula to find the number of pink particles per milliliter.
... |
train/4658 | Will these magnets attract or repel each other? | [
"repel",
"attract"
] | 0 | 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 north pole of one magnet is closest to the north pole of the other magnet. Like poles repel. So, these magnets will repel each other. |
train/4659 | Compare the average kinetic energies of the particles in each sample. Which sample has the higher temperature? | [
"sample B",
"sample A",
"neither; the samples have the same temperature"
] | 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... |
train/4660 | Which property matches this object? | [
"shiny",
"scratchy"
] | 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 cactus is scratchy.
A shiny object reflects a lot of light. The cactus is not shiny. |
train/4661 | Is fluorite a mineral? | [
"yes",
"no"
] | 0 | Fluorite has the following properties:
fixed crystal structure
not made by living things
found in nature
solid
pure substance | 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... | Fluorite has all the properties of a mineral. So, fluorite is a mineral. |
train/4662 | What is the capital of Nevada? | [
"Las Vegas",
"Dover",
"Reno",
"Carson City"
] | 3 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the West | Carson City is the capital of Nevada. | ||
train/4663 | Which property do these four objects have in common? | [
"transparent",
"sweet",
"sour"
] | 2 | 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.
Sugar has a sweet taste. The dill pickles are not sweet.
You can see clearly through a transparent object. The lime, the lemon, and the green apple are not transparent.
A lemon has a sour taste. All four objects are sour.
The property that all four o... |
train/4664 | Which statement describes the Yasuni National Park ecosystem? | [
"It has only a few types of organisms.",
"It has many different types of organisms.",
"It has soil that is rich in nutrients."
] | 1 | Figure: Yasuni National Park.
The Amazon rain forest in South America is the largest rain forest ecosystem in the world. Ecuador's Yasuni National Park, which is in the Amazon rain forest, has many different species of plants, birds, and mammals. | closed choice | grade6 | natural science | biology | Ecosystems | Describe ecosystems | An environment includes all of the biotic, or living, and abiotic, or nonliving, things in an area. An ecosystem is created by the relationships that form among the biotic and abiotic parts of an environment.
There are many different types of terrestrial, or land-based, ecosystems. Here are some ways in which terrestri... | A tropical rain forest is a type of ecosystem. Tropical rain forests have the following features: year-round rain and warm temperatures, soil that is poor in nutrients, and many different types of organisms. So, the following statement describes the Yasuni National Park ecosystem: year-round rain and warm temperatures,... |
train/4665 | Which continent is highlighted? | [
"Australia",
"South America",
"Antarctica"
] | 1 | closed choice | grade2 | social science | geography | Geography | Identify oceans and continents | A continent is one of the seven largest areas of land on earth. | This continent is South America. | |
train/4666 | What is the capital of Ohio? | [
"Cleveland",
"Des Moines",
"Cincinnati",
"Columbus"
] | 3 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the Midwest | Columbus is the capital of Ohio. | ||
train/4667 | Complete the sentence.
The mutation in the () affected the structure and function of the (). | [
"transporter protein . . . w gene",
"w gene . . . transporter protein"
] | 1 | 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.
The eyes of fruit flies look red because they contain molecules called pigments, which color the eyes red. Cells in the eyes of fruit flies have parts that mak... | 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 w gene affected the structure and function of the transporter protein. |
train/4668 | Which better describes the Mojave Desert ecosystem? | [
"It has dry, thin soil. It also has only a few types of organisms.",
"It has dry, thin soil. It also has many different types of organisms."
] | 1 | Figure: Mojave Desert.
The Mojave Desert is a desert ecosystem located mostly in Southern California. | 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 Mojave Desert has dry, thin soil. It also has many different types of organisms. |
train/4669 | What is the capital of Missouri? | [
"Milwaukee",
"Saint Louis",
"Kansas City",
"Jefferson City"
] | 3 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the Midwest | Jefferson City is the capital of Missouri. | ||
train/4670 | What is the direction of this push? | [
"toward her finger",
"away from her finger"
] | 1 | A woman is about to topple a line of dominoes. She uses a force to push the first domino with her finger. | 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 woman pushes the first domino. The direction of the push is away from her finger. |
train/4671 | Which of these states is farthest west? | [
"Maine",
"Delaware",
"Michigan",
"New York"
] | 2 | 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. Michigan is farthest west. | |
train/4672 | What is the capital of Wisconsin? | [
"Bismarck",
"Milwaukee",
"Green Bay",
"Madison"
] | 3 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the Midwest | Madison is the capital of Wisconsin. | ||
train/4673 | Which months have average temperatures of 30°C or higher in Dubai? | [
"January through May",
"July through November",
"May through September"
] | 2 | 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 Dubai, look at the graph.
Choice "May" is incorrect.
Choice "Jul" is incorrect.
Choice "Sep" is incorrect.
Choice "Nov" is incorrect.
Choice "Jan" is incorrect.
The average temperatures in May, June, July, August, and September are all 30°C or higher. So, May through Septem... |
train/4674 | Select the fish below. | [
"great white shark",
"toco toucan"
] | 0 | Fish live underwater. They have fins, not limbs. A piranha is an example of a fish. | 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 toco 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.
A great white shark is a fish. It lives underwater. It has fins, not limbs.
Great white sharks can live for up to 70 years. |
train/4675 | Think about the magnetic force between the magnets in each pair. Which of the following statements is true? | [
"The strength of the magnetic force is the same in both pairs.",
"The magnetic force is stronger in Pair 1.",
"The magnetic force is stronger in Pair 2."
] | 2 | The images below show two pairs of magnets. The magnets in different pairs do not affect each other. All the magnets shown are made of the same material. | closed choice | grade4 | natural science | physics | Magnets | Compare strengths of magnetic forces | Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart.
These pulls and pushes between magnets are called magnetic forces. The stronger the magnetic force between two magnets, the more strongly the magnets attract or repel each other.
You c... | Distance affects the strength of the magnetic force. When magnets are closer together, the magnetic force between them is stronger.
The magnets in Pair 2 are closer together than the magnets in Pair 1. So, the magnetic force is stronger in Pair 2 than in Pair 1. |
train/4676 | Which of the following could Gavin's test show? | [
"if the weather station would work when the temperature was 50°C",
"how well the weather station would work when it was windy"
] | 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 | 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... | |
train/4677 | Which air temperature was measured within the outlined area shown? | [
"-18°C",
"12°C",
"5°C"
] | 0 | The map below shows air temperatures in the lower atmosphere on April 15, 2017. The outlined area shows an air mass that influenced weather in North America on that day.
Look at the map. Then, answer the question below.
Data source: United States National Oceanic and Atmospheric Administration/Earth System Research Lab... | closed choice | grade6 | natural science | earth-science | Weather and climate | Identify and compare air masses | To study air masses, scientists can use maps that show conditions within Earth's atmosphere. For example, the map below uses color to show air temperatures.
The map's legend tells you the temperature that each color represents. Colors on the left in the legend represent lower temperatures than colors on the right. For ... | Look at the colors shown within the outlined area. Then, use the legend to determine which air temperatures those colors represent.
10°C.
-18°C is within this range.
5°C and 12°C are outside of this range. |
train/4678 | Think about the magnetic force between the magnets in each pair. Which of the following statements is true? | [
"The magnetic force is weaker in Pair 1.",
"The magnetic force is weaker in Pair 2.",
"The strength of the magnetic force is the same in both pairs."
] | 1 | The images below show two pairs of magnets. The magnets in different pairs do not affect each other. All the magnets shown are made of the same material. | closed choice | grade3 | natural science | physics | Magnets | Compare strengths of magnetic forces | Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart.
These pulls and pushes between magnets are called magnetic forces. The stronger the magnetic force between two magnets, the more strongly the magnets attract or repel each other.
You c... | Distance affects the strength of the magnetic force. When magnets are farther apart, the magnetic force between them is weaker.
The magnets in Pair 2 are farther apart than the magnets in Pair 1. So, the magnetic force is weaker in Pair 2 than in Pair 1. |
train/4679 | The United States has a federal system. Based on these definitions, which of these statements would most likely be made by a person who lives under a federal system? | [
"I only pay attention to state politics since the national government has almost no power.",
"Both my state and national government officials have power over important issues.",
"My national government officials decide most issues that come up."
] | 1 | Think about the name of the United States of America. As the name shows, the country has both a united national government and a collection of state governments. In the following questions, you will learn about the relationship between the national government and state governments. You will also learn about how state a... | closed choice | grade6 | social science | civics | Government | State and local government | ||
train/4680 | Think about the magnetic force between the magnets in each pair. Which of the following statements is true? | [
"The magnitude of the magnetic force is greater in Pair 2.",
"The magnitude of the magnetic force is greater 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 shapes. | closed choice | grade5 | natural science | physics | Magnets | 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 smaller distance between magnets, the magni... |
train/4681 | What is the capital of Oregon? | [
"Denver",
"Portland",
"Omaha",
"Salem"
] | 3 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the West | Salem is the capital of Oregon. | ||
train/4682 | Which animal is also adapted to be camouflaged among dead leaves? | [
"Arctic wolf",
"plated leaf chameleon"
] | 1 | Orange oakleaf butterflies live in the forests of Asia. This butterfly is adapted to be camouflaged among dead leaves.
Figure: orange oakleaf butterfly. | closed choice | grade5 | natural science | biology | Adaptations | Animal adaptations: skins and body coverings | An adaptation is an inherited trait that helps an organism survive or reproduce. Adaptations can include both body parts and behaviors.
The color, texture, and covering of an animal's skin are examples of adaptations. Animals' skins can be adapted in different ways. For example, skin with thick fur might help an animal... | Look at the picture of the orange oakleaf butterfly.
The orange oakleaf butterfly has a brown leaf-shaped body. It is adapted to be camouflaged among dead leaves, which often have a reddish or brownish color. The word camouflage means to blend in.
Now look at each animal. Figure out which animal has a similar adaptatio... |
train/4683 | Which country is highlighted? | [
"New Zealand",
"Samoa",
"Tonga",
"Fiji"
] | 1 | closed choice | grade7 | social science | geography | Oceania: geography | Identify and select countries of Oceania | This country is Samoa. | ||
train/4684 | 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 1.",
"The magnitude of the magnetic force is smaller 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. | closed choice | grade8 | natural science | physics | Velocity, acceleration, and forces | Compare magnitudes of magnetic forces | Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart. These pulls and pushes between magnets are called magnetic forces.
The strength of a force is called its magnitude. The greater the magnitude of the magnetic force between two magnets,... | The magnets in Pair 2 attract. The magnets in Pair 1 repel. But whether the magnets attract or repel affects only the direction of the magnetic force. It does not affect the magnitude of the magnetic force.
Both magnet sizes and distance affect the magnitude of the magnetic force. The sizes of the magnets in Pair 1 are... |
train/4685 | What is the capital of Oklahoma? | [
"Charleston",
"Oklahoma City",
"Denver",
"Tulsa"
] | 1 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the Southeast | Oklahoma City is the capital of Oklahoma. | ||
train/4686 | Which ocean is highlighted? | [
"the Arctic Ocean",
"the Indian Ocean",
"the Pacific Ocean",
"the Southern Ocean"
] | 1 | closed choice | grade8 | social science | geography | Physical Geography | Oceans and continents | Oceans are huge bodies of salt water. The world has five oceans. All of the oceans are connected, making one world ocean. | This is the Indian Ocean. | |
train/4687 | What is the capital of Illinois? | [
"Springfield",
"Saint Paul",
"Boise",
"Chicago"
] | 0 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the Midwest | Springfield is the capital of Illinois. | ||
train/4688 | What is the capital of Delaware? | [
"Dover",
"Hartford",
"Georgetown",
"Wilmington"
] | 0 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the Northeast | Dover is the capital of Delaware. | ||
train/4689 | 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."
] | 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,... | 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/4690 | 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 1.",
"The magnitude of the magnetic force is smaller in Pair 2."
] | 1 | The images below show two pairs of magnets. The magnets in different pairs do not affect each other. All the magnets shown are made of the same material, but some of them are different sizes. | closed choice | grade8 | natural science | physics | Velocity, acceleration, and forces | Compare magnitudes of magnetic forces | Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart. These pulls and pushes between magnets are called magnetic forces.
The strength of a force is called its magnitude. The greater the magnitude of the magnetic force between two magnets,... | The magnets in Pair 1 attract. The magnets in Pair 2 repel. But whether the magnets attract or repel affects only the direction of the magnetic force. It does not affect the magnitude of the magnetic force.
Magnet sizes affect the magnitude of the magnetic force. Imagine magnets that are the same shape and made of the ... |
train/4691 | What can Ryan and Eric trade to each get what they want? | [
"Eric can trade his almonds for Ryan's tomatoes.",
"Ryan can trade his tomatoes for Eric's carrots.",
"Eric can trade his broccoli for Ryan's oranges.",
"Ryan can trade his tomatoes for Eric's broccoli."
] | 3 | Trade happens when people agree to exchange goods and services. People give up something to get something else. Sometimes people barter, or directly exchange one good or service for another.
Ryan and Eric open their lunch boxes in the school cafeteria. Neither Ryan nor Eric got everything that they wanted. The table be... | closed choice | grade7 | social science | economics | Basic economic principles | Trade and specialization | Look at the table and images.
Ryan wants broccoli. Eric 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/4692 | Which of these states is farthest south? | [
"Maine",
"Montana",
"New York",
"Minnesota"
] | 2 | closed choice | grade2 | social science | geography | Geography | Read a map: cardinal directions | Maps have four cardinal directions, or main directions. Those directions are north, south, east, and west.
A compass rose is a set of arrows that point to the cardinal directions. A compass rose usually shows only the first letter of each cardinal direction.
The north arrow points to the North Pole. On most maps, north... | To find the answer, look at the compass rose. Look at which way the south arrow is pointing. New York is farthest south. | |
train/4693 | Which solution has a higher concentration of pink particles? | [
"neither; their concentrations are the same",
"Solution B",
"Solution A"
] | 2 | The diagram below is a model of two solutions. Each pink 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 pink particles represent the solute. To figure out which solution has a higher concentration of pink particles, look at both the number of pink particles and the volume of the solvent in each container.
Use the concentration formula to find the number of pink particles per milliliter.
... |
train/4694 | Complete the sentence to estimate the diameter of the Sun compared to Earth.
The Sun's diameter is about () times greater than Earth's. | [
"3",
"10",
"100"
] | 2 | Our solar system is made up of the Sun and all the objects that move around it. These objects include planets, moons, asteroids, and comets.
The sizes of the objects in the solar system are difficult to imagine without the help of a model. Models make certain characteristics of a system easier to understand. A model ca... | closed choice | grade8 | natural science | earth-science | Astronomy | Analyze models of the Earth-Sun-Moon system | In the model, the Sun and Earth are spheres. The diameter of a sphere is the distance from one side to the other through the center. You can use the model to estimate how many Earth diameters would add up to the Sun's diameter.
The Sun's diameter is represented by a black line. Earth's diameter is equal to the width of... | |
train/4695 | Which ocean is highlighted? | [
"the Pacific Ocean",
"the Arctic Ocean",
"the Atlantic Ocean",
"the Indian Ocean"
] | 3 | closed choice | grade8 | social science | geography | Physical Geography | Oceans and continents | Oceans are huge bodies of salt water. The world has five oceans. All of the oceans are connected, making one world ocean. | This is the Indian Ocean. | |
train/4696 | Select the chemical formula for this molecule. | [
"H4",
"P2H4",
"H3",
"PH3"
] | 3 | closed choice | grade5 | natural science | chemistry | Atoms and molecules | Match chemical formulas to ball-and-stick models | Every substance around you is made up of atoms. Atoms can link together to form molecules. The links between atoms in a molecule are called chemical bonds. Different molecules are made up of different chemical elements, or types of atoms, bonded together.
Scientists use both ball-and-stick models and chemical formulas ... | P is the symbol for phosphorus. H is the symbol for hydrogen. This ball-and-stick model shows a molecule with one phosphorus atom and three hydrogen atoms.
The chemical formula will contain the symbols P and H. There is one phosphorus atom, so P will not have a subscript. There are three hydrogen atoms, so H will have ... | |
train/4697 | What can Vicky and Regan trade to each get what they want? | [
"Vicky can trade her tomatoes for Regan's broccoli.",
"Vicky can trade her tomatoes for Regan's sandwich.",
"Regan can trade her broccoli for Vicky's oranges.",
"Regan can trade her almonds for Vicky'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.
Vicky and Regan open their lunch boxes in the school cafeteria. Both of them could be happier with their lunches. Vicky wanted br... | closed choice | grade6 | social science | economics | Basic economic principles | Trade and specialization | Vicky wanted broccoli in her lunch and Regan was hoping for tomatoes. Look at the labeled part of the images.
Vicky has tomatoes. Regan 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/4698 | In this experiment, which were part of an experimental group? | [
"the plots with fires",
"the plots with no fires"
] | 0 | The passage below describes an experiment.
Dr. Moran was the land manager for a prairie. The prairie had become overrun by unwanted grasses that were crowding out other plants. Dr. Moran thought she could use fire to remove the unwanted grasses.
Dr. Moran marked off six plots within a large area of the prairie. In thr... | closed choice | grade7 | natural science | science-and-engineering-practices | Designing experiments | Identify control and experimental groups | Experiments have variables, or parts that change. You can design an experiment to investigate whether changing a variable between different groups has a specific outcome.
For example, imagine you want to find out whether adding fertilizer to soil affects the height of pea plants. You could investigate this question wit... | In this experiment, Dr. Moran investigated whether burning plots of prairie affects which grasses grow. So, the plots with fires were part of an experimental group.
The plots with no fires were not burned. So, they were not part of an experimental group. |
train/4699 | Will these magnets attract or repel each other? | [
"repel",
"attract"
] | 0 | 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 north pole of one magnet is closest to the north pole of the other magnet. Like poles repel. So, these magnets will repel each other. |
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