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train/5600 | Which solution has a higher concentration of green particles? | [
"neither; their concentrations are the same",
"Solution B",
"Solution A"
] | 1 | The diagram below is a model of two solutions. Each green ball represents one particle of solute. | closed choice | grade6 | natural science | chemistry | Solutions | Compare concentrations of solutions | A solution is made up of two or more substances that are completely mixed. In a solution, solute particles are mixed into a solvent. The solute cannot be separated from the solvent by a filter. For example, if you stir a spoonful of salt into a cup of water, the salt will mix into the water to make a saltwater solution... | In Solution A and Solution B, the green particles represent the solute. To figure out which solution has a higher concentration of green particles, look at both the number of green particles and the volume of the solvent in each container.
Use the concentration formula to find the number of green particles per millilit... |
train/5601 | Which state is highlighted? | [
"New Hampshire",
"Massachusetts",
"Delaware",
"Maryland"
] | 2 | closed choice | grade3 | social science | geography | States | Identify states of the Northeast | This state is Delaware. | ||
train/5602 | 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 | 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 the two samples has the same mass, but the particles in sample B have a higher average speed than the particles in sample A. So, the particles in sample B have a higher average kinetic energy than the particles in sample A.
Because the particles in sample B have the higher average kinetic energy, sampl... |
train/5603 | Which of these states is farthest west? | [
"Kentucky",
"Maine",
"South Carolina",
"Maryland"
] | 0 | 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. Kentucky is farthest west. | |
train/5604 | Which continent is highlighted? | [
"Africa",
"Australia",
"North America",
"Europe"
] | 1 | closed choice | grade6 | 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 Australia. | |
train/5605 | Will these magnets attract or repel each other? | [
"attract",
"repel"
] | 1 | Two magnets are placed as shown.
Hint: Magnets that attract pull together. Magnets that repel push apart. | closed choice | grade2 | natural science | physics | Magnets | Identify magnets that attract or repel | Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart.
Whether a magnet attracts or repels other magnets depends on the positions of its poles, or ends. Every magnet has two poles, called north and south.
Here are some examples of magnets.... | Will these magnets attract or repel? To find out, look at which poles are closest to each other.
The south pole of one magnet is closest to the south pole of the other magnet. Poles that are the same repel. So, these magnets will repel each other. |
train/5606 | Which of these states is farthest east? | [
"Louisiana",
"New Jersey",
"West Virginia",
"Utah"
] | 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 east arrow is pointing. New Jersey is farthest east. | |
train/5607 | What is the name of the colony shown? | [
"Massachusetts",
"New Hampshire",
"Alabama",
"Rhode Island"
] | 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/5608 | Which continent is highlighted? | [
"Europe",
"Australia",
"Antarctica",
"Africa"
] | 2 | 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 Antarctica. | |
train/5609 | Does this passage describe the weather or the climate? | [
"climate",
"weather"
] | 1 | Figure: Botswana.
Botswana has the largest population of elephants in Africa. Elephants often gather near rivers and creeks. Many of these creeks dried up during the drought of 1985, when the skies were clear of clouds for many months.
Hint: Weather is what the atmosphere is like at a certain place and time. Climate is... | 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.
Botswana has the largest population of elephants in Africa. Elephants often gather near rivers and creeks. Many of these creeks dried up during the drought of 1985, when the skies were clear of clouds for many months.
The underlined part of the passage tells you about the lack of clouds seen... |
train/5610 | What is the capital of Utah? | [
"Provo",
"Orlando",
"Salt Lake City",
"Helena"
] | 2 | closed choice | grade4 | social science | geography | State capitals | Identify the 50 state capitals | Salt Lake City is the capital of Utah. | ||
train/5611 | What is the capital of Wyoming? | [
"Honolulu",
"Cheyenne",
"Laramie",
"Tampa"
] | 1 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the West | Cheyenne is the capital of Wyoming. | ||
train/5612 | Will these magnets attract or repel each other? | [
"attract",
"repel"
] | 1 | Two magnets are placed as shown. | closed choice | grade5 | natural science | physics | Magnets | Identify magnets that attract or repel | Magnets can pull or push on other magnets without touching them. When magnets attract, they pull together. When magnets repel, they push apart. These pulls and pushes are called magnetic forces.
Magnetic forces are strongest at the magnets' poles, or ends. Every magnet has two poles: a north pole (N) and a south pole (... | To predict if these magnets will attract or repel, look at which poles are closest to each other.
The south pole of one magnet is closest to the south pole of the other magnet. Like poles repel. So, these magnets will repel each other. |
train/5613 | Which continent is highlighted? | [
"Antarctica",
"South America",
"Europe",
"Asia"
] | 1 | closed choice | grade5 | social science | geography | Oceans and continents | Identify oceans and continents | A continent is one of the major land masses on the earth. Most people say there are seven continents. | This continent is South America. | |
train/5614 | Complete the statement.
Silicon dioxide is (). | [
"an elementary substance",
"a compound"
] | 1 | The model below represents silicon dioxide. Silicon dioxide occurs naturally in the mineral quartz, which makes up many of the particles in sand. | closed choice | grade7 | 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 silicon dioxide is an elementary substance or a compound.
Step 1: Interpret the model.
.
Use the legend to determine the chemical element represented by each color. The colors and atomic symbols from the legend are shown in the table below. The table also includes the names of the che... |
train/5615 | Look at the models of molecules below. Select the elementary substance. | [
"ethanol",
"acetaldehyde",
"nitrogen"
] | 2 | 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/5616 | During this time, thermal energy was transferred from () to (). | [
"each battery . . . the surroundings",
"the surroundings . . . each battery"
] | 0 | Two friends bought phones that cost different amounts but had identical batteries. After using the phones for a while, both friends had to turn them off to let the batteries cool. This table shows how the temperature of each battery changed over 5minutes. | 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 battery decreased, which means that the thermal energy of each battery decreased. So, thermal energy was transferred from each battery to the surroundings. |
train/5617 | Is Hydra vulgaris made up of many cells? | [
"no",
"yes"
] | 1 | This organism is Hydra vulgaris. It is a member of the animal kingdom.
Hydra vulgaris can make new offspring through a process called budding. A small H. vulgaris can start to grow from the side of its parent. When the baby H. vulgaris is fully grown, it will split off from its parent. | yes or no | grade4 | natural science | biology | Classification | Describe, classify, and compare kingdoms | In the past, scientists classified living organisms into two groups: plants and animals. Over the past 300 years, scientists have discovered many more types of organisms. Today, many scientists classify organisms into six broad groups, called kingdoms.
Organisms in each kingdom have specific traits. The table below sho... | Hydra vulgaris is an animal. Animals are made up of many cells. |
train/5618 | Which of these states is farthest east? | [
"Alabama",
"Louisiana",
"Massachusetts",
"Nebraska"
] | 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 east arrow is pointing. Massachusetts is farthest east. | |
train/5619 | What is the capital of Massachusetts? | [
"Montpelier",
"Concord",
"Annapolis",
"Boston"
] | 3 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the Northeast | Boston is the capital of Massachusetts. | ||
train/5620 | Select the bird below. | [
"Mojave rattlesnake",
"red-tailed hawk"
] | 1 | Birds have feathers, two wings, and a beak. A flamingo is an example of a bird. | closed choice | grade2 | natural science | biology | Classification | Identify mammals, birds, fish, reptiles, and amphibians | Birds, mammals, fish, reptiles, and amphibians are groups of animals. The animals in each group have traits in common.
Scientists sort animals into groups based on traits they have in common. This process is called classification. | A Mojave rattlesnake is a reptile. It has scaly, waterproof skin.
A red-tailed hawk is a bird. It has feathers, two wings, and a beak. |
train/5621 | What can Lacey and Felix trade to each get what they want? | [
"Felix can trade his almonds for Lacey's tomatoes.",
"Felix can trade his broccoli for Lacey's oranges.",
"Lacey can trade her tomatoes for Felix's carrots.",
"Lacey can trade her tomatoes for Felix'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.
Lacey and Felix open their lunch boxes in the school cafeteria. Neither Lacey nor Felix got everything that they wanted. The tabl... | closed choice | grade8 | social science | economics | Basic economic principles | Trade and specialization | Look at the table and images.
Lacey wants broccoli. Felix 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/5622 | According to the map, which of the following statements is true about North America in the early colonial era? | [
"European settlements overlapped with areas settled by Native Americans.",
"The Dutch controlled the most territory in eastern North America."
] | 0 | Look at the map of North America in the early colonial era, or the 1600s and early 1700s. Then answer the question below. | closed choice | grade7 | social science | us-history | Colonial America | Life as a colonist | ||
train/5623 | What can Kamal and Jake trade to each get what they want? | [
"Jake can trade his broccoli for Kamal's oranges.",
"Kamal can trade his tomatoes for Jake's broccoli.",
"Kamal can trade his tomatoes for Jake's carrots.",
"Jake can trade his almonds for Kamal's tomatoes."
] | 1 | Trade happens when people agree to exchange goods and services. People give up something to get something else. Sometimes people barter, or directly exchange one good or service for another.
Kamal and Jake open their lunch boxes in the school cafeteria. Neither Kamal nor Jake got everything that they wanted. The table ... | closed choice | grade7 | social science | economics | Basic economic principles | Trade and specialization | Look at the table and images.
Kamal wants broccoli. Jake 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/5624 | Which of these states is farthest east? | [
"Kansas",
"Connecticut",
"Wyoming",
"Delaware"
] | 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 east arrow is pointing. Connecticut is farthest east. | |
train/5625 | Which ocean is highlighted? | [
"the Indian Ocean",
"the Atlantic Ocean",
"the Arctic Ocean",
"the Pacific 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 Atlantic Ocean. | |
train/5626 | Which of the following organisms is the tertiary consumer in this food web? | [
"grizzly bear",
"snowy owl",
"parasitic jaeger"
] | 1 | Below is a food web from a tundra ecosystem in Nunavut, a territory in Northern Canada.
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 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... | Tertiary consumers eat secondary consumers. So, in a food web, tertiary consumers have arrows pointing to them from secondary consumers. Secondary consumers have arrows pointing to them from primary consumers. And primary consumers have arrows pointing to them from producers.
The grizzly bear has arrows pointing to it ... |
train/5627 | Select the bird below. | [
"piranha",
"box turtle",
"water buffalo",
"loon"
] | 3 | Birds have feathers, two wings, and a beak.
Birds are warm-blooded. Warm-blooded animals can control their body temperature.
An ostrich 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 loon is a bird. It has feathers, two wings, and a beak.
Loons usually live near lakes. They dive in the water to hunt for food.
A box turtle is a reptile. It has scaly, waterproof skin.
Box turtles can live to be over 100 years old!
A water buffalo is a mammal. It has hair and feeds its young milk.
Water buffaloes li... |
train/5628 | What is the capital of Wyoming? | [
"Cheyenne",
"Laramie",
"Boise",
"Baltimore"
] | 0 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the West | Cheyenne is the capital of Wyoming. | ||
train/5629 | Complete the statement.
Water is (). | [
"a compound",
"an elementary substance"
] | 0 | The model below represents a molecule of water. Over 98% of the molecules in your body are water molecules. | closed choice | grade5 | natural science | chemistry | Atoms and molecules | Classify elementary substances and compounds using models | All substances are made of one or more chemical elements, or types of atoms. Substances that are made of only one chemical element are elementary substances. Substances that are made of two or more chemical elements bonded together are compounds.
Every chemical element is represented by its own symbol. For some element... | Count the number of chemical elements represented in the model. Then, decide if water is an elementary substance or a compound.
In this model, each ball is labeled with H for hydrogen or O for oxygen. So, the model shows you that water is made of two chemical elements bonded together.
Substances made of two or more che... |
train/5630 | Which of the following could Jackson'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 | 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/5631 | Is the following statement about our solar system true or false?
Jupiter's volume is more than 1,000 times that of Earth. | [
"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 1,000 times the volume of Earth.
Then compare the result to the volume of Jupiter. The volume of Jupiter is 1.43 x 10^15 km^3, which is more than 1.08 x 10^15 km^3. So, Jupiter's volume is more than 1,000 times that of Earth. |
train/5632 | Identify the question that Kamal's experiment can best answer. | [
"Does water freeze more quickly than apple juice?",
"Does apple juice expand more or less than water when it freezes?"
] | 1 | The passage below describes an experiment. Read the passage and then follow the instructions below.
Kamal poured 30 milliliters of water into each of six measuring cups. He poured the same volume of apple juice into another six measuring cups. He kept the measuring cups in a freezer for 48 hours. Kamal then observed t... | 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/5633 | Which i in column 4? | [
"the police department",
"the theater",
"the diner",
"the fire department"
] | 2 | closed choice | grade2 | 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 diner is in column 4. | |
train/5634 | Which animal's skin is also adapted for survival in cold places? | [
"armadillo lizard",
"polar bear"
] | 1 | live in the forests and mountains of Asia and Europe. The lynx's skin is adapted to help the animal survive in cold places.
Figure: Eurasian lynx. | 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 Eurasian lynx.
During the winter, the Eurasian lynx has thick fur covering its skin. Its skin is adapted for survival in cold places. The Eurasian lynx uses its fur to keep warm in cold weather.
Now look at each animal. Figure out which animal has a similar adaptation.
The polar bear has skin... |
train/5635 | Which of these states is farthest south? | [
"Louisiana",
"South Dakota",
"Illinois",
"Massachusetts"
] | 0 | 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. Louisiana is farthest south. | |
train/5636 | Select the mammal below. | [
"African bullfrog",
"rabbit"
] | 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 rabbit is a mammal. It has fur and feeds its young milk.
Rabbits live underground in burrows. A group of rabbit burrows is called a warren.
An African 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. |
train/5637 | Which state is highlighted? | [
"Rhode Island",
"Delaware",
"Massachusetts",
"New Jersey"
] | 2 | closed choice | grade3 | social science | geography | States | Identify states of the Northeast | This state is Massachusetts. | ||
train/5638 | 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/5639 | Complete the statement.
Chlorine is (). | [
"a compound",
"an elementary substance"
] | 1 | The model below represents a molecule of chlorine. Chlorine is a gas that is used to kill bacteria in water supplies. | 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 chlorine is an elementary substance or a compound.
Step 1: Interpret the model.
In the ball-and-stick model shown above, both of the balls are the same color:
. The legend shows that green represents the chemical element with the atomic symbol Cl. So, the model shows you that a molecu... |
train/5640 | What is the capital of Kansas? | [
"Saint Paul",
"Topeka",
"Sioux Falls",
"Frankfort"
] | 1 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the Midwest | Topeka is the capital of Kansas. | ||
train/5641 | What is the capital of Alabama? | [
"Birmingham",
"Hartford",
"Montgomery",
"Augusta"
] | 2 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the Southeast | Montgomery is the capital of Alabama. | ||
train/5642 | What is the capital of Wyoming? | [
"Cheyenne",
"Laramie",
"Olympia",
"Chicago"
] | 0 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the West | Cheyenne is the capital of Wyoming. | ||
train/5643 | 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."
] | 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. | Distance affects the strength of the magnetic force. But the distance between the magnets in Pair 1 and in Pair 2 is the same.
So, the strength of the magnetic force is the same in both pairs. |
train/5644 | Is a stuffed rabbit a solid or a liquid? | [
"a liquid",
"a solid"
] | 1 | closed choice | grade2 | natural science | physics | States of matter | Classify matter as solid or liquid | Solid and liquid are states of matter. Matter is anything that takes up space. Matter can come in different states, or forms.
When matter is a solid, it has a shape of its own.
Some solids can be bent or broken easily. Others are hard to bend or break.
A glass cup is a solid. A sock is also a solid.
When matter is a li... | A stuffed rabbit is a solid. A solid has a size and shape of its own.
When you hold a stuffed rabbit in your hands, the stuffed rabbit still has a size and shape of its own. | |
train/5645 | Which of these states is farthest south? | [
"West Virginia",
"Louisiana",
"New Mexico",
"New York"
] | 1 | 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 south arrow is pointing. Louisiana is farthest south. | |
train/5646 | What is the capital of Alaska? | [
"Salem",
"Boise",
"Little Rock",
"Juneau"
] | 3 | closed choice | grade4 | social science | geography | State capitals | Identify the 50 state capitals | Juneau is the capital of Alaska. | ||
train/5647 | What is the capital of Hawaii? | [
"Laramie",
"Honolulu",
"Hilo",
"Boston"
] | 1 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the West | Honolulu is the capital of Hawaii. | ||
train/5648 | Which of these states is farthest north? | [
"New Mexico",
"Rhode Island",
"Maine",
"Maryland"
] | 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 north arrow is pointing. Maine is farthest north. | |
train/5649 | Which of these states is farthest east? | [
"New Mexico",
"South Dakota",
"Arkansas",
"Oregon"
] | 2 | closed choice | grade3 | social science | geography | Geography | Read a map: cardinal directions | To find the answer, look at the compass rose. Look at which way the east arrow is pointing. Arkansas is farthest east. | ||
train/5650 | What is the capital of Montana? | [
"Columbia",
"Sacramento",
"Helena",
"Billings"
] | 2 | closed choice | grade5 | social science | geography | State capitals | Identify the 50 state capitals | Helena is the capital of Montana. | ||
train/5651 | Compare the average kinetic energies of the particles in each sample. Which sample has the higher temperature? | [
"sample A",
"neither; the samples have the same temperature",
"sample B"
] | 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 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 ... |
train/5652 | What is the direction of this push? | [
"away from his hands",
"toward his hands"
] | 0 | A boy and his younger brother play with their toy car in the snow. The older brother uses a force to push the car forward with his hands. | 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 older brother pushes the car. The direction of the push is away from his hands. |
train/5653 | What is the capital of Utah? | [
"Tallahassee",
"Provo",
"Carson City",
"Salt Lake City"
] | 3 | closed choice | grade4 | social science | geography | State capitals | Identify the 50 state capitals | Salt Lake City is the capital of Utah. | ||
train/5654 | What is the capital of Delaware? | [
"Providence",
"Wilmington",
"Dover",
"Burlington"
] | 2 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the Northeast | Dover is the capital of Delaware. | ||
train/5655 | Which term matches the picture? | [
"bilateral symmetry",
"radial symmetry"
] | 1 | Read the text.
If something has bilateral symmetry, you can draw a line from top to bottom and both sides of the line will match. For example, if you drew a line down the center of someone's face, both sides would have one eye, half a nose, and half a mouth. If you drew a line in the middle from left to right, however,... | closed choice | grade6 | language science | vocabulary | Context clues | Determine the meaning of domain-specific words with pictures | Radial symmetry describes something that is symmetrical, or matching, all the way around. For example, the right side of a snowflake looks the same as its left side, and the top looks the same as the bottom. | |
train/5656 | Which material is this tablecloth made of? | [
"ceramic",
"linen"
] | 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 tablecloth.
The tablecloth is made of linen.
Linen is made from the stems of flax plants. First, the stems are cut. Then, the stems are soaked in water until they are soft. The soft fibers from the stems are then spun into yarn. | |
train/5657 | Which solution has a higher concentration of pink particles? | [
"neither; their concentrations are the same",
"Solution B",
"Solution A"
] | 0 | 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/5658 | During this time, thermal energy was transferred from () to (). | [
"the surroundings . . . each bottle",
"each bottle . . . the surroundings"
] | 0 | Two bottles of soda were sitting on a porch on a hot day. The two bottles were identical, except that one bottle was made of brown glass and one bottle was made of clear glass. This table shows how the temperature of each bottle changed over 25minutes. | closed choice | grade8 | 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 bottle increased, which means that the thermal energy of each bottle increased. So, thermal energy was transferred from the surroundings to each bottle. |
train/5659 | What is the name of the colony shown? | [
"Delaware",
"New York",
"Pennsylvania",
"Virginia"
] | 2 | closed choice | grade8 | social science | us-history | Colonial America | Identify the Thirteen Colonies | The colony is Pennsylvania. | ||
train/5660 | Which statement best describes the average monthly precipitation in Boston? | [
"Precipitation does not change much from month to month in Boston.",
"About the same amount of precipitation falls each month between May and October.",
"March is drier than January, February, and October."
] | 1 | Use the graph to answer the question below. | closed choice | grade3 | natural science | earth-science | Weather and climate | Use climate data to make predictions | Scientists record climate data from places around the world. Precipitation, or rain and snow, is one type of climate data.
A bar graph can be used to show the average amount of precipitation each month. Months with taller bars have more precipitation on average. | To describe the average precipitation trends in Boston, look at the graph.
Choice "Jan" is incorrect.
Choice "Feb" is incorrect.
Choice "Mar" is incorrect.
Choice "May" is incorrect.
Choice "Oct" is incorrect.
Choice "Precipitation does not change much from month to month in Boston." is incorrect.
On average, more prec... |
train/5661 | Look at the models of molecules below. Select the elementary substance. | [
"methanol",
"tetraphosphorus",
"ethane"
] | 1 | closed choice | grade6 | natural science | chemistry | Atoms and molecules | Identify elementary substances and compounds using models | There are more than 100 different chemical elements, or types of atoms. Chemical elements make up all of the substances around you.
A substance may be composed of one chemical element or multiple chemical elements. Substances that are composed of only one chemical element are elementary substances. Substances that are ... | ||
train/5662 | Select the amphibian below. | [
"emerald tree boa",
"western gorilla",
"gray tree frog",
"water buffalo"
] | 2 | Amphibians have moist skin and begin their lives in water.
Amphibians are cold-blooded. The body temperature of cold-blooded animals depends on their environment.
A California toad is an example of an amphibian. | 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. | An emerald tree boa is a reptile. It has scaly, waterproof skin.
Tree boas eat small mammals, birds, lizards, and frogs. Tree boas only need to eat once every few months!
A gray tree frog is an amphibian. It has moist skin and begins its life in water.
There are many kinds of tree frogs. Most tree frogs are very small.... |
train/5663 | Which month is the coldest on average in Tokyo? | [
"August and September",
"October and November",
"January and February"
] | 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 | To describe the average temperature trends in Tokyo, look at the graph.
Choice "Feb" is incorrect.
Choice "Aug" is incorrect.
Choice "Sep" is incorrect.
Choice "Oct" is incorrect.
Choice "Nov" is incorrect.
Choice "Jan" is incorrect.
The average temperatures in January and February are around 5°C. These months have the... | |
train/5664 | Which of the following statements describes the Roman Empire during the Pax Romana? | [
"The Roman Empire controlled all of the land around the Mediterranean Sea.",
"The Roman Empire only controlled land in Europe and Africa.",
"The Roman Empire controlled all of the land around the Caspian Sea."
] | 0 | The period of the Pax Romana, or the Roman Peace, lasted from 27 BCE to 180 CE. During this period, the Roman Empire reached its largest size. Look at the map of the Roman Empire during the Pax Romana. Then answer the question below. | closed choice | grade6 | social science | world-history | Rome and the Byzantine Empire | The fall of the Western Roman Empire | ||
train/5665 | Which country is highlighted? | [
"Saint Vincent and the Grenadines",
"Barbados",
"Saint Lucia",
"Dominica"
] | 1 | closed choice | grade8 | social science | geography | The Americas: geography | Identify and select countries of the Caribbean | This country is Barbados. | ||
train/5666 | What is the name of the colony shown? | [
"Maryland",
"Connecticut",
"Illinois",
"Virginia"
] | 0 | closed choice | grade4 | social science | us-history | English colonies in North America | Identify the Thirteen Colonies | The colony is Maryland. | ||
train/5667 | What is the capital of Wyoming? | [
"Charleston",
"Cheyenne",
"Salem",
"Seattle"
] | 1 | closed choice | grade5 | social science | geography | State capitals | Identify the 50 state capitals | Cheyenne is the capital of Wyoming. | ||
train/5668 | Which of these states is farthest south? | [
"Montana",
"Minnesota",
"Washington",
"Connecticut"
] | 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 south arrow is pointing. Connecticut is farthest south. | |
train/5669 | Which country is highlighted? | [
"Vanuatu",
"Solomon Islands",
"Nauru",
"Fiji"
] | 0 | closed choice | grade7 | social science | geography | Oceania: geography | Identify and select countries of Oceania | This country is Vanuatu.
Does Vanuatu have any territorial disputes?
Vanuatu claims to own Matthew and Hunter Islands, which are disputed islands. In other words, multiple countries or groups claim that the islands rightfully belong to them.
France has controlled the islands since 1929. But shortly after gaining indepe... | ||
train/5670 | Which country is highlighted? | [
"Cuba",
"Dominica",
"the Dominican Republic",
"Saint Lucia"
] | 1 | closed choice | grade8 | social science | geography | The Americas: geography | Identify and select countries of the Caribbean | This country is Dominica. | ||
train/5671 | What is the capital of Maryland? | [
"Phoenix",
"Manchester",
"Annapolis",
"Dover"
] | 2 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the Northeast | Annapolis is the capital of Maryland. | ||
train/5672 | What is the capital of Kentucky? | [
"Atlanta",
"Lansing",
"Louisville",
"Frankfort"
] | 3 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the Southeast | Frankfort is the capital of Kentucky. | ||
train/5673 | During this time, thermal energy was transferred from () to (). | [
"each greenhouse . . . the surroundings",
"the surroundings . . . each greenhouse"
] | 1 | Two identical greenhouses were next to each other. There were solar panels on the roof of one greenhouse but not on the roof of the other greenhouse. This table shows how the temperature of each greenhouse changed over 2hours. | 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 greenhouse increased, which means that the thermal energy of each greenhouse increased. So, thermal energy was transferred from the surroundings to each greenhouse. |
train/5674 | Which continent is highlighted? | [
"Africa",
"North America",
"Asia",
"Europe"
] | 0 | 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 Africa. | |
train/5675 | What can Turner and Dylan trade to each get what they want? | [
"Dylan can trade his almonds for Turner's tomatoes.",
"Turner can trade his tomatoes for Dylan's carrots.",
"Turner can trade his tomatoes for Dylan's broccoli.",
"Dylan can trade his broccoli for Turner's oranges."
] | 2 | Trade happens when people agree to exchange goods and services. People give up something to get something else. Sometimes people barter, or directly exchange one good or service for another.
Turner and Dylan open their lunch boxes in the school cafeteria. Neither Turner nor Dylan got everything that they wanted. The ta... | closed choice | grade8 | social science | economics | Basic economic principles | Trade and specialization | Look at the table and images.
Turner wants broccoli. Dylan 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/5676 | Which continent is highlighted? | [
"Europe",
"Africa",
"Asia"
] | 2 | 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 Asia. | |
train/5677 | Look at the picture. Which word best describes the sound this water makes? | [
"dripping",
"snapping",
"growling"
] | 0 | closed choice | grade2 | language science | writing-strategies | Descriptive details | Choose the sensory details that match the picture | When you write, you can use sensory details. These sense words help your reader understand what something looks, sounds, tastes, smells, or feels like.
Sensory Category | Description
Sight | These are words like bright, clean, and purple. A reader can imagine looking at these details.
Sound | These are words like hissi... | Look at the picture.
The word dripping describes the sound this water makes.
Growling and snapping can also describe sounds. But they do not describe the sounds this water makes. | |
train/5678 | What can Alvin and Mason trade to each get what they want? | [
"Mason can trade his almonds for Alvin's tomatoes.",
"Alvin can trade his tomatoes for Mason's carrots.",
"Mason can trade his broccoli for Alvin's oranges.",
"Alvin can trade his tomatoes for Mason'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.
Alvin and Mason open their lunch boxes in the school cafeteria. Neither Alvin nor Mason got everything that they wanted. The tabl... | closed choice | grade7 | social science | economics | Basic economic principles | Trade and specialization | Look at the table and images.
Alvin wants broccoli. Mason 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/5679 | Which continent is highlighted? | [
"Africa",
"Asia",
"Europe",
"South America"
] | 1 | closed choice | grade5 | social science | geography | Oceans and continents | Identify oceans and continents | A continent is one of the major land masses on the earth. Most people say there are seven continents. | This continent is Asia. | |
train/5680 | What is the capital of Indiana? | [
"Lansing",
"Indianapolis",
"Springfield",
"Fort Wayne"
] | 1 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the Midwest | Indianapolis is the capital of Indiana. | ||
train/5681 | In this food chain, the Arctic fox is a consumer. Why? | [
"It eats another organism.",
"It makes its own food."
] | 0 | This diagram shows a food chain from Baffin Island, a tundra ecosystem in Canada. | 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 Arctic fox is a consumer because it eats another organism. The Arctic fox in this food chain eats the Arctic hare. |
train/5682 | Based on the timeline, which statement is true? | [
"The Revolutionary War lasted about eight years.",
"The Declaration of Independence was signed after the Revolutionary War ended.",
"The Declaration of Independence was signed before the Revolutionary War began."
] | 0 | Look at the timeline of events from the Revolutionary War. Then answer the question below. | closed choice | grade8 | social science | us-history | The American Revolution | The Revolutionary War: struggle for independence | ||
train/5683 | Select the fish below. | [
"eastern newt",
"tokay gecko",
"gray tree frog",
"hammerhead shark"
] | 3 | Fish live underwater. They have fins, not limbs.
Fish are cold-blooded. The body temperature of cold-blooded animals depends on their environment.
A salmon is an example of a fish. | 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 gray tree frog is an amphibian. It has moist skin and begins its life in water.
There are many kinds of tree frogs. Most tree frogs are very small. They can walk on thin branches.
An eastern newt is an amphibian. It has moist skin and begins its life in water.
Some newts live in water. Other newts live on land but la... |
train/5684 | Which property do these three objects have in common? | [
"hard",
"blue",
"sticky"
] | 2 | Select the best answer. | closed choice | grade3 | natural science | physics | Materials | Compare properties of objects | An object has different properties. A property of an object can tell you how it looks, feels, tastes, or smells. Properties can also tell you how an object will behave when something happens to it.
Different objects can have properties in common. You can use these properties to put objects into groups. | Look at each object.
For each object, decide if it has that property.
A sticky object can attach or stick to other things. All three objects are sticky.
A hard object does not change shape when pressed or squeezed. The bubble gum and the tape are not hard.
Blue is a color.
This color is blue. The caramel corn and the b... |
train/5685 | Which property do these four objects have in common? | [
"rough",
"hard",
"salty"
] | 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.
A rough object feels scratchy when you touch it. The potato chips are rough, but the ocean water is not.
A hard object does not change shape when pressed or squeezed. The pretzel is hard, but the ocean water and the fries are not.
Potato chips have a... |
train/5686 | Does this passage describe the weather or the climate? | [
"weather",
"climate"
] | 0 | Figure: Mount Washington.
Mount Washington is a tall mountain in New Hampshire. On April 12, 1934, a wind speed of 231 miles per hour was recorded on the mountain.
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.
Mount Washington is a tall mountain in New Hampshire. On April 12, 1934, a wind speed of 231 miles per hour was recorded on the mountain.
The underlined part of the passage tells you about the wind speed on Mount Washington on April 12, 1934. This passage describes the atmosphere at a certai... |
train/5687 | Which better describes the tide pool ecosystems in Paparoa National Park? | [
"It has daily flooding and draining of seawater. It also has many different types of organisms.",
"It has daily flooding and draining of seawater. It also has water that is poor in nutrients."
] | 0 | Figure: Paparoa National Park.
Paparoa National Park is in New Zealand, a country in the southwestern Pacific Ocean. The park 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 Paparoa National Park have daily flooding and draining of seawater. They also have many d... |
train/5688 | What is the capital of South Carolina? | [
"Charleston",
"Columbia",
"Lansing",
"Los Angeles"
] | 1 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the Southeast | Columbia is the capital of South Carolina. | ||
train/5689 | Which solution has a higher concentration of blue particles? | [
"Solution B",
"Solution A",
"neither; their concentrations are the same"
] | 2 | 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/5690 | Which country is highlighted? | [
"the Dominican Republic",
"Grenada",
"Antigua and Barbuda",
"Dominica"
] | 3 | closed choice | grade8 | social science | geography | The Americas: geography | Identify and select countries of the Caribbean | This country is Dominica. | ||
train/5691 | Which of these states is farthest east? | [
"Wyoming",
"Iowa",
"Arkansas",
"Vermont"
] | 3 | closed choice | grade4 | social science | geography | Maps | Read a map: cardinal directions | Maps have four cardinal directions, or main directions. Those directions are north, south, east, and west.
A compass rose is a set of arrows that point to the cardinal directions. A compass rose usually shows only the first letter of each cardinal direction.
The north arrow points to the North Pole. On most maps, north... | To find the answer, look at the compass rose. Look at which way the east arrow is pointing. Vermont is farthest east. | |
train/5692 | Which better describes the tide pool ecosystems in Olympic National Park? | [
"It has daily flooding and draining of seawater. It also has water that is poor in nutrients.",
"It has daily flooding and draining of seawater. It also has many different types of organisms."
] | 1 | Figure: Olympic National Park.
Olympic National Park is in western Washington State. The park is on the coast of the Pacific Ocean. 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 Olympic National Park have daily flooding and draining of seawater. They also have many d... |
train/5693 | Compare the average kinetic energies of the particles in each sample. Which sample has the higher temperature? | [
"sample A",
"neither; the samples have the same temperature",
"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 | 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 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/5694 | What is the capital of Washington? | [
"Spokane",
"Seattle",
"Olympia",
"Denver"
] | 2 | closed choice | grade4 | social science | geography | State capitals | Identify the 50 state capitals | Olympia is the capital of Washington. | ||
train/5695 | Which is this organism's common name? | [
"Aldabra giant tortoise",
"Aldabrachelys gigantea"
] | 0 | This organism is Aldabrachelys gigantea. It is also called an Aldabra giant tortoise. | 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,... | Aldabrachelys gigantea is written in italics. The first word is capitalized, and the second word is not. So, it is the scientific name.
Aldabrachelys gigantea is the organism's scientific name. So, you know that Aldabra giant tortoise is the common name. |
train/5696 | What is the capital of California? | [
"Lincoln",
"Sacramento",
"Spokane",
"Juneau"
] | 1 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the West | Sacramento is the capital of California. | ||
train/5697 | 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/5698 | 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."
] | 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 | 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.
Both magnet sizes and distance affect the magnitude of the magnetic force. The sizes of the magnets in Pair 1 are... |
train/5699 | Which of the following was a dependent variable in this experiment? | [
"the temperature where the dough was left to rise",
"the size of each dough ball"
] | 1 | The passage below describes an experiment. Read the passage and think about the variables that are described.
Elena was learning to bake bread at home. Her first few batches of dough did not rise, or expand, as much as they should have. Elena's mother noted that the kitchen was cold and suggested that the dough might ... | 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... |
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