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train/2100 | Is sandstone a mineral or a rock? | [
"mineral",
"rock"
] | 1 | Sandstone has the following properties:
no fixed crystal structure
formed in layers
found in nature
not made by organisms
not a pure substance
solid | closed choice | grade7 | natural science | earth-science | Rocks and minerals | Identify rocks and minerals | Minerals are the building blocks of rocks. A rock can be made of one or more minerals.
Minerals and rocks have the following properties:
Property | Mineral | Rock
It is a solid. | Yes | Yes
It is formed in nature. | Yes | Yes
It is not made by organisms. | Yes | Yes
It is a pure substance. | Yes | No
It has a fixed cry... | The properties of sandstone match the properties of a rock. So, sandstone is a rock. |
train/2101 | Which of the following could Rick's test show? | [
"if at least 20% of the park would be shaded by trees in each design",
"which design would have the least traffic noise in the concert area",
"which design would have the greatest distance between the concert area and the road"
] | 2 | People can use the engineering-design process to develop solutions to problems. One step in the process is testing if a potential solution meets the requirements of the design.
The passage below describes how the engineering-design process was used to test a solution to a problem. Read the passage. Then answer the ques... | closed choice | grade8 | natural science | science-and-engineering-practices | Engineering practices | Evaluate tests of engineering-design solutions | People can use the engineering-design process to develop solutions to problems. One step in the process is testing if a potential solution meets the requirements of the design. How can you determine what a test can show? You need to figure out what was tested and what was measured.
Imagine an engineer needs to design a... | |
train/2102 | What is the name of the colony shown? | [
"South Carolina",
"Pennsylvania",
"Virginia",
"Massachusetts"
] | 0 | closed choice | grade5 | social science | us-history | English colonies in North America | Identify the Thirteen Colonies | The colony is South Carolina. | ||
train/2103 | In this experiment, which were part of a control group? | [
"the roses that were not sprayed",
"the roses sprayed with garlic juice"
] | 0 | The passage below describes an experiment.
Mia grew roses for a flower shop. One day, she noticed tumor-like growths on her rose stems. She could tell that the plants had crown gall disease, which is caused by a type of bacteria. She knew that allicin, a chemical in garlic, can kill bacteria. Mia wondered if spraying ... | closed choice | grade8 | 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, Mia investigated whether spraying roses with garlic juice affects how many crown gall tumors form. The roses that were not sprayed did not get garlic juice. So, they were part of a control group. |
train/2104 | Based on the table, in which story does the main character travel through time by accident? | [
"in both The Time Machine and A Connecticut Yankee in King Arthur's Court",
"only in A Connecticut Yankee in King Arthur's Court"
] | 1 | This table compares three stories about time travel. | closed choice | grade6 | language science | writing-strategies | Visual elements | Read graphic organizers | A graphic organizer is a chart or picture that shows how ideas, facts, or topics are related to one another.
When you read, look for graphic organizers included in the text. You can use these images to find key information. You can also create your own graphic organizers with information that you've read. Doing this ca... | In a table, each cell gives information related to its row and column. This table compares three stories about time travel.
Look in the Plot column to find the story about a character who travels through time accidentally. Follow that row left to see what's in the Story column. A Connecticut Yankee in King Arthur's Cou... |
train/2105 | What is the capital of South Carolina? | [
"Charleston",
"Columbia",
"Frankfort",
"Baton Rouge"
] | 1 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the Southeast | Columbia is the capital of South Carolina. | ||
train/2106 | Which property matches this object? | [
"bouncy",
"blue"
] | 0 | Select the better answer. | closed choice | grade2 | natural science | physics | Materials | Identify properties of an object | An object has different properties. A property of an object can tell you how it looks, feels, tastes, or smells. | Look at the object.
Think about each property.
Blue is a color.
This color is blue. The rubber ball is not blue.
A bouncy object will bounce back from the floor if you drop it. The rubber ball is bouncy. |
train/2107 | Which state is highlighted? | [
"Missouri",
"Ohio",
"Iowa",
"Illinois"
] | 3 | closed choice | grade5 | social science | geography | States | Identify states of the Midwest | This state is Illinois. | ||
train/2108 | What is the capital of Oklahoma? | [
"Jackson",
"Oklahoma City",
"Fargo",
"Charleston"
] | 1 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the Southeast | Oklahoma City is the capital of Oklahoma. | ||
train/2109 | 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 1.",
"The magnitude of the magnetic force is greater in Pair 2.",
"The magnitude 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 | grade7 | natural science | physics | Velocity, acceleration, and forces | Compare magnitudes of magnetic forces | Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart. These pulls and pushes between magnets are called magnetic forces.
The strength of a force is called its magnitude. The greater the magnitude of the magnetic force between two magnets,... | The magnets in Pair 1 attract. The magnets in Pair 2 repel. But whether the magnets attract or repel affects only the direction of the magnetic force. It does not affect the magnitude of the magnetic force.
Distance affects the magnitude of the magnetic force. When there is a smaller distance between magnets, the magni... |
train/2110 | Which of the following could Kevin'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/2111 | What is the name of the colony shown? | [
"South Carolina",
"Wisconsin",
"Florida",
"Maryland"
] | 0 | closed choice | grade5 | social science | us-history | English colonies in North America | Identify the Thirteen Colonies | The colony is South Carolina. | ||
train/2112 | Which solution has a higher concentration of yellow particles? | [
"Solution A",
"Solution B",
"neither; their concentrations are the same"
] | 2 | 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/2113 | Which property matches this object? | [
"fuzzy",
"shiny"
] | 0 | 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 fuzzy object is covered in soft hair. The boots are fuzzy.
A shiny object reflects a lot of light. You can usually see your reflection in a shiny object. The boots are not shiny. |
train/2114 | What can Wyatt and Gabe trade to each get what they want? | [
"Gabe can trade his almonds for Wyatt's tomatoes.",
"Wyatt can trade his tomatoes for Gabe's broccoli.",
"Gabe can trade his broccoli for Wyatt's oranges.",
"Wyatt can trade his tomatoes for Gabe's carrots."
] | 1 | Trade happens when people agree to exchange goods and services. People give up something to get something else. Sometimes people barter, or directly exchange one good or service for another.
Wyatt and Gabe open their lunch boxes in the school cafeteria. Neither Wyatt nor Gabe 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.
Wyatt wants broccoli. Gabe 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/2115 | Is rhyolite a mineral or a rock? | [
"rock",
"mineral"
] | 0 | Rhyolite has the following properties:
not made by organisms
solid
no fixed crystal structure
found in nature
light-colored
not a pure substance | closed choice | grade8 | natural science | earth-science | Rocks and minerals | Identify rocks and minerals | Minerals are the building blocks of rocks. A rock can be made of one or more minerals.
Minerals and rocks have the following properties:
Property | Mineral | Rock
It is a solid. | Yes | Yes
It is formed in nature. | Yes | Yes
It is not made by organisms. | Yes | Yes
It is a pure substance. | Yes | No
It has a fixed cry... | The properties of rhyolite match the properties of a rock. So, rhyolite is a rock. |
train/2116 | Which material is this ring made of? | [
"metal",
"concrete"
] | 0 | closed choice | grade2 | 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 ring.
The ring is made of metal.
Rings can be made of many different types of metal, including silver, gold, platinum, and titanium. This ring is made of gold. | |
train/2117 | Identify the question that Levi's experiment can best answer. | [
"Does temperature affect how much bacteria can grow in liquid?",
"Do more bacteria grow in liquid with cinnamon than in liquid without cinnamon?"
] | 1 | The passage below describes an experiment. Read the passage and then follow the instructions below.
Levi mixed bacteria into a nutrient-rich liquid where the bacteria could grow. He poured four ounces of the mixture into each of ten glass flasks. In five of the ten flasks, he also added one teaspoon of cinnamon. He al... | closed choice | grade8 | natural science | science-and-engineering-practices | Designing experiments | Identify the experimental question | Experiments can be designed to answer specific questions. How can you identify the questions that a certain experiment can answer? In order to do this, you need to figure out what was tested and what was measured during the experiment.
Imagine an experiment with two groups of daffodil plants. One group of plants was gr... | |
train/2118 | Will these magnets attract or repel each other? | [
"repel",
"attract"
] | 1 | Two magnets are placed as shown. | closed choice | grade5 | natural science | physics | Magnets | Identify magnets that attract or repel | Magnets can pull or push on other magnets without touching them. When magnets attract, they pull together. When magnets repel, they push apart. These pulls and pushes are called magnetic forces.
Magnetic forces are strongest at the magnets' poles, or ends. Every magnet has two poles: a north pole (N) and a south pole (... | To predict if these magnets will attract or repel, look at which poles are closest to each other.
The north pole of one magnet is closest to the south pole of the other magnet. Opposite poles attract. So, these magnets will attract each other. |
train/2119 | Which i in row A? | [
"the fast-food restaurant",
"the theater",
"the pond",
"the fire department"
] | 2 | closed choice | grade3 | social science | geography | Geography | Use a letter-number grid | A grid is made up of lines of squares. They are organized in rows and columns. A grid can help you use a map.
A row is a line of squares that goes from side to side. Rows are marked with letters.
A column is a line of squares that goes up and down. Columns are marked with numbers. | The pond is in row A. | |
train/2120 | What is the name of the colony shown? | [
"North Carolina",
"Pennsylvania",
"Connecticut",
"Alabama"
] | 0 | closed choice | grade8 | social science | us-history | Colonial America | Identify the Thirteen Colonies | The colony is North Carolina. | ||
train/2121 | Which statement describes the Taklamakan Desert ecosystem? | [
"It has warm summers and mild winters.",
"It has dry, thin soil."
] | 1 | Figure: Taklamakan Desert.
The Taklamakan Desert is a cold desert ecosystem in northwestern China. Towns in this desert were stops along the Silk Road, a historical trade route between China and eastern Europe. | closed choice | grade8 | natural science | biology | Ecosystems | Describe ecosystems | An environment includes all of the biotic, or living, and abiotic, or nonliving, things in an area. An ecosystem is created by the relationships that form among the biotic and abiotic parts of an environment.
There are many different types of terrestrial, or land-based, ecosystems. Here are some ways in which terrestri... | A cold desert is a type of ecosystem. Cold deserts have the following features: a small amount of rain or snow, dry, thin soil, and long, cold winters. So, the following statements describe the Taklamakan Desert ecosystem: a small amount of rain or snow, dry, thin soil, and long, cold winters. It has dry, thin soil. It... |
train/2122 | Which animal is also adapted for flight? | [
"Cape vulture",
"quokka"
] | 0 | Great blue herons fly long distances each year to find food. They have wings instead of arms. Herons are adapted for flight.
Figure: great blue heron. | closed choice | grade4 | 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 great blue heron.
The great blue heron has large, powerful wings. It is adapted for flight. Long, powerful wings help the great blue heron travel long distances by air.
Now look at each animal. Figure out which animal has a similar adaptation.
The Cape vulture has large, powerful wings. It is... |
train/2123 | Complete the statement.
Hydrogen chloride is (). | [
"an elementary substance",
"a compound"
] | 1 | The model below represents a molecule of hydrogen chloride. Hydrogen chloride is part of the liquid in your stomach that helps digest food. | 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 hydrogen chloride is an elementary substance or a compound.
In this model, each ball is labeled with H for hydrogen or Cl for chlorine. So, the model shows you that hydrogen chloride is made of two chemical elements bonded together.
Substan... |
train/2124 | What is the capital of Washington? | [
"Olympia",
"Huntington",
"Seattle",
"Laramie"
] | 0 | closed choice | grade4 | social science | geography | State capitals | Identify the 50 state capitals | Olympia is the capital of Washington. | ||
train/2125 | What is the probability that a pea plant produced by this cross will have round peas? | [
"4/4",
"1/4",
"2/4",
"0/4",
"3/4"
] | 2 | In a group of pea plants, some individuals have round peas and others have wrinkled peas. In this group, the gene for the pea shape trait has two alleles. The allele for wrinkled peas (e) is recessive to the allele for round peas (E).
This Punnett square shows a cross between two pea plants. | closed choice | grade8 | natural science | biology | Genes to traits | Use Punnett squares to calculate probabilities of offspring types | Offspring phenotypes: dominant or recessive?
How do you determine an organism's phenotype for a trait? Look at the combination of alleles in the organism's genotype for the gene that affects that trait. Some alleles have types called dominant and recessive. These two types can cause different versions of the trait to a... | |
train/2126 | During this time, thermal energy was transferred from () to (). | [
"the surroundings . . . each greenhouse",
"each greenhouse . . . the surroundings"
] | 0 | 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/2127 | Will these magnets attract or repel each other? | [
"attract",
"repel"
] | 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 south pole of one magnet is closest to the north pole of the other magnet. Opposite poles attract. So, these magnets will attract each other. |
train/2128 | Is magnetite a mineral or a rock? | [
"mineral",
"rock"
] | 0 | Magnetite has the following properties:
fixed crystal structure
not made by organisms
metallic luster
naturally occurring
pure substance
solid | closed choice | grade8 | natural science | earth-science | Rocks and minerals | Identify rocks and minerals | Minerals are the building blocks of rocks. A rock can be made of one or more minerals.
Minerals and rocks have the following properties:
Property | Mineral | Rock
It is a solid. | Yes | Yes
It is formed in nature. | Yes | Yes
It is not made by organisms. | Yes | Yes
It is a pure substance. | Yes | No
It has a fixed cry... | Magnetite has all the properties of a mineral. So, magnetite is a mineral. |
train/2129 | What is the expected ratio of offspring that have myotonia congenita to offspring that do not have myotonia congenita? Choose the most likely ratio. | [
"3:1",
"4:0",
"2:2",
"0:4",
"1:3"
] | 2 | This passage describes the myotonia congenita trait in goats:
Myotonia congenita is a condition that causes temporary muscle stiffness. When goats with myotonia congenita attempt to run from a resting position, their leg muscles often stiffen, causing them to fall over. Because of this behavior, these goats are referre... | 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 that do or do not have myotonia congenita, consider whether each phenotype is the dominant or recessive allele's version of the myotonia congenita trait. The question tells you that the m allele, which is for not having myotonia congenita, is recessi... |
train/2130 | Select the organism in the same genus as the bobcat. | [
"Macropus rufus",
"Ardea purpurea",
"Lynx pardinus"
] | 2 | This organism is a bobcat. Its scientific name is Lynx rufus. | closed choice | grade6 | natural science | biology | Classification and scientific names | Use scientific names to classify organisms | Scientists use scientific names to identify organisms. Scientific names are made of two words.
The first word in an organism's scientific name tells you the organism's genus. A genus is a group of organisms that share many traits.
A genus is made up of one or more species. A species is a group of very similar organisms... | A bobcat's scientific name is Lynx rufus. The first word of its scientific name is Lynx.
Macropus rufus and Lynx rufus are not in the same genus.
These organisms are not in the same genus, but part of their scientific names is the same. Macropus rufus and Lynx rufus have the same species name within their genus, rufus.... |
train/2131 | Which country is highlighted? | [
"the Marshall Islands",
"Papua New Guinea",
"Vanuatu",
"Solomon Islands"
] | 3 | closed choice | grade6 | social science | geography | Oceania: geography | Identify and select countries of Oceania | This country is Solomon Islands. | ||
train/2132 | Which of these cities is marked on the map? | [
"Washington, D.C.",
"Pittsburgh",
"Boston",
"New York City"
] | 3 | closed choice | grade4 | social science | geography | Cities | Cities of the Northeast | The city is New York City, New York. Pittsburgh, Boston, and Washington, D.C., are marked with gray circles on the map below. | ||
train/2133 | 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 B",
"sample A"
] | 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 A has more mass than each particle 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 kinetic energy, sample A mus... |
train/2134 | Will these magnets attract or repel each other? | [
"attract",
"repel"
] | 1 | Two magnets are placed as shown. | closed choice | grade4 | natural science | physics | Magnets | Identify magnets that attract or repel | Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart.
Whether a magnet attracts or repels other magnets depends on the positions of its poles, or ends. Every magnet has two poles: north and south.
Here are some examples of magnets. The no... | To predict if these magnets will attract or repel, look at which poles are closest to each other.
Both poles of each magnet line up with both poles of the other magnet. The north pole of each magnet is closest to the north pole of the other magnet. Like poles repel. So, these magnets will repel each other. |
train/2135 | Identify the question that Grayson's experiment can best answer. | [
"Does the type of flour used in the muffins affect the number of muffins that turn brown after 30 minutes in the oven?",
"Do muffins made with white flour have larger volumes than muffins made with whole wheat flour?"
] | 1 | The passage below describes an experiment. Read the passage and then follow the instructions below.
Grayson made six batches of muffins over the course of one day. He used whole wheat flour in three of the batches and white flour in the other three batches. He divided the batter into muffin tins, using two ounces of b... | 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/2136 | 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, 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,... | Distance affects the magnitude of the magnetic force. When there is a smaller distance between magnets, the magnitude of the magnetic force between them is greater.
There is a smaller distance between the magnets in Pair 2 than in Pair 1. So, the magnitude of the magnetic force is greater in Pair 2 than in Pair 1. |
train/2137 | What is the capital of Nevada? | [
"Reno",
"Carson City",
"Baton Rouge",
"Jefferson City"
] | 1 | closed choice | grade5 | social science | geography | State capitals | Identify the 50 state capitals | Carson City is the capital of Nevada. | ||
train/2138 | Will these magnets attract or repel each other? | [
"repel",
"attract"
] | 0 | 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 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/2139 | Which animal's mouth is also adapted to tear through meat? | [
"nutria",
"Eurasian lynx"
] | 1 | Cheetahs are carnivores, or meat eaters. They eat large mammals like antelope. The 's mouth is adapted to tear through meat.
Figure: cheetah. | closed choice | grade5 | natural science | biology | Adaptations | Animal adaptations: beaks, mouths, and necks | An adaptation is an inherited trait that helps an organism survive or reproduce. Adaptations can include both body parts and behaviors.
The shape of an animal's mouth is one example of an adaptation. Animals' mouths can be adapted in different ways. For example, a large mouth with sharp teeth might help an animal tear ... | Look at the picture of the cheetah.
The cheetah has a large mouth and sharp teeth. Its mouth is adapted to tear through meat. The cheetah uses its large mouth to grab its prey. It uses its sharp teeth to cut up the meat of the prey into pieces it can swallow.
Now look at each animal. Figure out which animal has a simil... |
train/2140 | What is the name of the colony shown? | [
"Delaware",
"Illinois",
"Maryland",
"New Jersey"
] | 2 | closed choice | grade8 | social science | us-history | Colonial America | Identify the Thirteen Colonies | The colony is Maryland. | ||
train/2141 | Which statement describes the Kaeng Krachan National Park ecosystem? | [
"It has many different types of organisms.",
"It has mostly small plants."
] | 0 | Figure: Kaeng Krachan National Park.
Kaeng Krachan National Park is a tropical rain forest ecosystem in western Thailand. It is Thailand's largest national park and has many animals, including elephants. | closed choice | grade5 | 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 statements describe the Kaeng Krachan National Park ecosystem: year-round rain and warm temper... |
train/2142 | Which country is highlighted? | [
"Solomon Islands",
"Nauru",
"Vanuatu",
"Fiji"
] | 2 | closed choice | grade8 | 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/2143 | What is the capital of Wyoming? | [
"Cheyenne",
"Boston",
"Laramie",
"Olympia"
] | 0 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the West | Cheyenne is the capital of Wyoming. | ||
train/2144 | 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 and shapes. | closed choice | grade7 | natural science | physics | Velocity, acceleration, and forces | Compare magnitudes of magnetic forces | Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart. These pulls and pushes between magnets are called magnetic forces.
The strength of a force is called its magnitude. The greater the magnitude of the magnetic force between two magnets,... | The magnets in Pair 1 attract. The magnets in Pair 2 repel. But whether the magnets attract or repel affects only the direction of the magnetic force. It does not affect the magnitude of the magnetic force.
Magnet sizes affect the magnitude of the magnetic force. Imagine magnets that are the same shape and made of the ... |
train/2145 | Which rhetorical appeal is primarily used in this ad? | [
"pathos (emotion)",
"ethos (character)",
"logos (reason)"
] | 1 | closed choice | grade12 | language science | writing-strategies | Persuasive strategies | Identify appeals to ethos, pathos, and logos in advertisements | The purpose of an advertisement is to persuade people to do something. To accomplish this purpose, advertisements use three types of persuasive strategies, or appeals.
Appeals to ethos, or character, show the writer or speaker as trustworthy, authoritative, or sharing important values with the audience. An ad that appe... | The ad appeals to ethos, or character, by referencing an endorsement from a respected organization. | |
train/2146 | Select the organism in the same genus as the fire clownfish. | [
"Amphiprion frenatus",
"Halichoeres hortulanus",
"Alopias pelagicus"
] | 0 | This organism is a fire clownfish. Its scientific name is Amphiprion melanopus. | 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 fire clownfish's scientific name is Amphiprion melanopus. The first word of its scientific name is Amphiprion.
Alopias pelagicus is in the genus Alopias. The first word of its scientific name is Alopias. So, Alopias pelagicus and Amphiprion melanopus are not in the same genus.
Amphiprion frenatus is in the genus Amph... |
train/2147 | What evidence of a drought does this picture show? | [
"The ground is dry and cracked.",
"It is about to start raining."
] | 0 | This picture was taken during a drought. A drought happens when an area gets less rain or snow than usual. | closed choice | grade2 | natural science | earth-science | Earth events | Find evidence of changes to Earth's surface | Evidence is information that tells you something happened.
How do you look for evidence of a change to Earth's surface?
There are many ways to find evidence of a change to Earth's surface. One way is to look at a picture that was taken after the change.
Here are some examples of what the evidence for different changes ... | |
train/2148 | Based on the time line, which event happens after James Marshall discovers gold and before gold becomes harder to find? | [
"Many people move to California.",
"Silver is discovered in Nevada."
] | 0 | This time line shows important events during the California Gold Rush. | closed choice | grade5 | language science | writing-strategies | Visual elements | Read graphic organizers | A graphic organizer is a chart or picture that shows how ideas, facts, or topics are related to one another.
When you read, look for graphic organizers included in the text. You can use these images to find key information. You can also create your own graphic organizers with information that you've read. Doing this ca... | A time line shows the order of events by placing them along a line. This time line shows important events during the California Gold Rush.
Look at how the events are ordered on the time line. Events that happened earlier are shown to the left. Events that happened later are shown to the right. Many people move to Calif... |
train/2149 | Which of these states is farthest south? | [
"Michigan",
"Utah",
"Rhode Island",
"North Dakota"
] | 1 | 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. Utah is farthest south. | |
train/2150 | What is the name of the colony shown? | [
"New York",
"Delaware",
"South Carolina",
"Maryland"
] | 3 | closed choice | grade7 | social science | us-history | Colonial America | Identify the Thirteen Colonies | The colony is Maryland. | ||
train/2151 | Which statement describes the Serengeti National Park ecosystem? | [
"It has soil that is poor in nutrients.",
"It has soil that is rich in nutrients."
] | 0 | Figure: Serengeti National Park.
Serengeti National Park is a savanna grassland ecosystem in Tanzania, a country in eastern Africa. Many types of animals migrate through the park each year. | 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 savanna grassland is a type of ecosystem. Savanna grasslands have the following features: warm summers and warm winters, a rainy season and a dry season, and soil that is poor in nutrients. So, the following statements describe the Serengeti National Park ecosystem: warm summers and warm winters, a rainy season and a... |
train/2152 | Which statement best describes the average monthly precipitation in New Orleans? | [
"The wettest months of the year are June, July, and August.",
"October is the wettest month.",
"June, July, and August are the driest months of the year."
] | 0 | 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. Precipitation, or rain and snow, is one type of climate data. Scientists collect data over many years. They can use this data to calculate the average precipitation for each month. The average precipitation can be used to describe the climate of a location.
A... | To describe the average precipitation trends in New Orleans, look at the graph.
Choice "Jun" is incorrect.
Choice "Jul" is incorrect.
Choice "Aug" is incorrect.
Choice "Oct" is incorrect.
Choice "October is the wettest month." is incorrect.
Every other month has a higher average precipitation than October. So, October ... |
train/2153 | What is the capital of Hawaii? | [
"Salt Lake City",
"Phoenix",
"Helena",
"Honolulu"
] | 3 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the West | Honolulu is the capital of Hawaii. | ||
train/2154 | During this time, thermal energy was transferred from () to (). | [
"the surroundings . . . each vial",
"each vial . . . the surroundings"
] | 0 | Scientists in a laboratory were working with insulin, a protein often used to treat diabetes. They left two identical vials of insulin in different places. This table shows how the temperature of each vial changed over 15minutes. | 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 vial increased, which means that the thermal energy of each vial increased. So, thermal energy was transferred from the surroundings to each vial. |
train/2155 | Which part of the soybean plant do we usually eat? | [
"the seeds",
"the leaves",
"the fruit"
] | 0 | People use soybean plants for food. We usually eat the part of this plant that can grow into a new plant. | closed choice | grade4 | natural science | biology | Plants | Classify fruits and vegetables as plant parts | The fruits and vegetables we eat are parts of plants! Plants are made up of different structures. The different structures carry out important functions.
The roots take in water and nutrients from the soil. They also hold the plant in place in the soil.
The stem supports the plant. It carries food, water, and nutrients... | The part of the soybean plant we usually eat is the seeds. They can grow into a new plant. |
train/2156 | During this time, thermal energy was transferred from () to (). | [
"the surroundings . . . each refrigerator",
"each refrigerator . . . the surroundings"
] | 0 | 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/2157 | Compare the average kinetic energies of the particles in each sample. Which sample has the higher temperature? | [
"sample B",
"neither; the samples have the same temperature",
"sample A"
] | 1 | The diagrams below show two pure samples of gas in identical closed, rigid containers. Each colored ball represents one gas particle. Both samples have the same number of particles. | closed choice | 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 the two samples has the same mass, and the particles in both samples have the same average speed. So, the particles in both samples have the same average kinetic energy.
Because the particles in both samples have the same average kinetic energy, the samples must have the same temperature. |
train/2158 | What can Chloe and Justin trade to each get what they want? | [
"Justin can trade his broccoli for Chloe's oranges.",
"Chloe can trade her tomatoes for Justin's carrots.",
"Chloe can trade her tomatoes for Justin's broccoli.",
"Justin can trade his almonds for Chloe's tomatoes."
] | 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.
Chloe and Justin open their lunch boxes in the school cafeteria. Neither Chloe nor Justin got everything that they wanted. The ta... | closed choice | grade7 | social science | economics | Basic economic principles | Trade and specialization | Look at the table and images.
Chloe wants broccoli. Justin 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/2159 | What is the capital of Ohio? | [
"Cleveland",
"Jefferson City",
"Madison",
"Columbus"
] | 3 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the Midwest | Columbus is the capital of Ohio. | ||
train/2160 | Will these magnets attract or repel each other? | [
"attract",
"repel"
] | 0 | Two magnets are placed as shown. | closed choice | grade5 | natural science | physics | Magnets | Identify magnets that attract or repel | Magnets can pull or push on other magnets without touching them. When magnets attract, they pull together. When magnets repel, they push apart. These pulls and pushes are called magnetic forces.
Magnetic forces are strongest at the magnets' poles, or ends. Every magnet has two poles: a north pole (N) and a south pole (... | To predict if these magnets will attract or repel, look at which poles are closest to each other.
The south pole of one magnet is closest to the north pole of the other magnet. Opposite poles attract. So, these magnets will attract each other. |
train/2161 | Look at the models of molecules below. Select the elementary substance. | [
"chloroform",
"fluorine",
"propane"
] | 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/2162 | What is the capital of Missouri? | [
"Austin",
"Los Angeles",
"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/2163 | What is the capital of Kansas? | [
"Wichita",
"Lansing",
"Kansas City",
"Topeka"
] | 3 | closed choice | grade5 | social science | geography | State capitals | Identify state capitals of the Midwest | Topeka is the capital of Kansas. | ||
train/2164 | Based on the time line, who does Tybalt fight with first? | [
"Mercutio",
"Romeo"
] | 0 | This time line shows events from Romeo and Juliet by William Shakespeare. | closed choice | grade5 | language science | writing-strategies | Visual elements | Read graphic organizers | A graphic organizer is a chart or picture that shows how ideas, facts, or topics are related to one another.
When you read, look for graphic organizers included in the text. You can use these images to find key information. You can also create your own graphic organizers with information that you've read. Doing this ca... | A time line shows the order of events by placing them along a line. This time line shows events from Romeo and Juliet by William Shakespeare.
Look at how the events are ordered on the time line. Events that happen earlier are shown to the left. Events that happen later are shown to the right. Tybalt fights with Mercuti... |
train/2165 | 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 | 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,... | Distance affects the magnitude of the magnetic force. When there is a smaller distance between magnets, the magnitude of the magnetic force between them is greater.
There is a smaller distance between the magnets in Pair 2 than in Pair 1. So, the magnitude of the magnetic force is greater in Pair 2 than in Pair 1. |
train/2166 | Which property matches this object? | [
"slippery",
"sticky"
] | 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 slippery object is hard to hold onto or stand on. The melted marshmallow is not slippery.
A sticky object can attach or stick to other things. The melted marshmallow is sticky. |
train/2167 | Which country is highlighted? | [
"Tonga",
"Kiribati",
"Palau",
"Tuvalu"
] | 3 | closed choice | grade8 | social science | geography | Oceania: geography | Identify and select countries of Oceania | This country is Tuvalu. | ||
train/2168 | Which solution has a higher concentration of yellow particles? | [
"neither; their concentrations are the same",
"Solution B",
"Solution A"
] | 2 | The diagram below is a model of two solutions. Each yellow 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 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/2169 | Which term matches the picture? | [
"cocoon",
"chrysalis"
] | 1 | Read the text.
Butterflies and moths are easily mistaken for each other, but one distinction between them often appears during their pupal stage. When most butterfly caterpillars reach full size, they attach themselves to a leaf or other object and shed their skin a final time, forming a chrysalis, a hard, shell-like s... | closed choice | grade8 | language science | word-study | Domain-specific vocabulary | Determine the meaning of domain-specific words with pictures | A chrysalis is a hard, protective shell-like skin that forms around a butterfly pupa. It often hangs from a silk disk and blends into the environment around it. | |
train/2170 | Will these magnets attract or repel each other? | [
"repel",
"attract"
] | 1 | Two magnets are placed as shown. | closed choice | grade4 | natural science | physics | Magnets | Identify magnets that attract or repel | Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart.
Whether a magnet attracts or repels other magnets depends on the positions of its poles, or ends. Every magnet has two poles: north and south.
Here are some examples of magnets. The no... | To predict if these magnets will attract or repel, look at which poles are closest to each other.
The north pole of one magnet is closest to the south pole of the other magnet. Opposite poles attract. So, these magnets will attract each other. |
train/2171 | 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 | 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/2172 | Which of these continents does the equator intersect? | [
"Europe",
"North America",
"South America"
] | 2 | closed choice | grade4 | social science | geography | Maps | Use lines of latitude and longitude | Lines of latitude and lines of longitude are imaginary lines drawn on some globes and maps. They can help you find places on globes and maps.
Lines of latitude show how far north or south a place is. We use units called degrees to describe how far a place is from the equator. The equator is the line located at 0° latit... | The equator is the line at 0° latitude. It intersects South America. It does not intersect North America or Europe. | |
train/2173 | What is the capital of Washington? | [
"Seattle",
"Olympia",
"Lincoln",
"Spokane"
] | 1 | closed choice | grade3 | social science | geography | State capitals | Identify state capitals of the West | Olympia is the capital of Washington. | ||
train/2174 | Will these magnets attract or repel each other? | [
"repel",
"attract"
] | 1 | Two magnets are placed as shown. | closed choice | grade5 | natural science | physics | Magnets | Identify magnets that attract or repel | Magnets can pull or push on other magnets without touching them. When magnets attract, they pull together. When magnets repel, they push apart. These pulls and pushes are called magnetic forces.
Magnetic forces are strongest at the magnets' poles, or ends. Every magnet has two poles: a north pole (N) and a south pole (... | To predict if these magnets will attract or repel, look at which poles are closest to each other.
The north pole of one magnet is closest to the south pole of the other magnet. Opposite poles attract. So, these magnets will attract each other. |
train/2175 | Which property do these three objects have in common? | [
"fragile",
"bouncy",
"bumpy"
] | 0 | Select the best answer. | closed choice | grade3 | natural science | physics | Materials | Compare properties of objects | An object has different properties. A property of an object can tell you how it looks, feels, tastes, or smells. Properties can also tell you how an object will behave when something happens to it.
Different objects can have properties in common. You can use these properties to put objects into groups. | Look at each object.
For each object, decide if it has that property.
A fragile object will break into pieces if you drop it. All three objects are fragile.
A bouncy object will bounce back from the floor if you drop it. None of the objects are bouncy.
A bumpy object is covered in lumps and bumps. The glass bottle and ... |
train/2176 | 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/2177 | 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 | 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/2178 | Select the chemical formula for this molecule. | [
"HI2",
"HI",
"HeI",
"He2I2"
] | 1 | 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 ... | H is the symbol for hydrogen. I is the symbol for iodine. This ball-and-stick model shows a molecule with one hydrogen atom and one iodine atom.
The chemical formula will contain the symbols H and I. There is one hydrogen atom, so H will not have a subscript. There is one iodine atom, so I will not have a subscript.
Th... | |
train/2179 | Which of these states is farthest east? | [
"North Dakota",
"Colorado",
"California",
"Kentucky"
] | 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 east arrow is pointing. Kentucky is farthest east. | |
train/2180 | Look at the models of molecules below. Select the elementary substance. | [
"fluorine",
"benzene",
"dichloromethane"
] | 0 | closed choice | grade6 | natural science | chemistry | Atoms and molecules | Identify elementary substances and compounds using models | There are more than 100 different chemical elements, or types of atoms. Chemical elements make up all of the substances around you.
A substance may be composed of one chemical element or multiple chemical elements. Substances that are composed of only one chemical element are elementary substances. Substances that are ... | ||
train/2181 | Which ocean is highlighted? | [
"the Indian Ocean",
"the Atlantic Ocean",
"the Arctic Ocean",
"the Southern Ocean"
] | 2 | closed choice | grade7 | social science | geography | Physical Geography | Oceans and continents | Oceans are huge bodies of salt water. The world has five oceans. All of the oceans are connected, making one world ocean. | This is the Arctic Ocean. | |
train/2182 | Complete the sentence.
The word "antebellum" means (). | [
"before the feast",
"after the long peace",
"after the election",
"before the war"
] | 3 | The time period in United States history between 1820 and 1861 is often called the antebellum period. During the antebellum period, the North and South became more divided. In the following questions, you learn more about the changes that happened during the antebellum period.
The following table shows other words that... | closed choice | grade8 | social science | us-history | The Antebellum period | Causes of the Civil War: Missouri Compromise to Bleeding Kansas | Look at the underlined parts of the table.
All the words that use the root "ante" mean to come before something else. So, the root ante means "before."
All the words that use the root "bellum" mean to fight or cause war.So, the root bellum means "war."
So, the word "antebellum" means "before the war." The antebellum pe... | |
train/2183 | Which of these states is farthest west? | [
"Maine",
"Connecticut",
"Illinois",
"Alabama"
] | 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 west arrow is pointing. Illinois is farthest west. | |
train/2184 | Which term matches the picture? | [
"phloem",
"xylem"
] | 1 | Read the text.
The stem of a plant contains different types of tissue. Two of these types are xylem and phloem. Xylem tissue carries water and nutrients from the roots of the plant to the leaves. Xylem moves materials in only one direction, up the plant's stem. Phloem tissue carries nutrients from the leaves to other p... | closed choice | grade6 | language science | vocabulary | Context clues | Determine the meaning of domain-specific words with pictures | Xylem moves water and nutrients from the roots of plants to the leaves. The materials in xylem move in only one direction. | |
train/2185 | Which property do these three objects have in common? | [
"rough",
"slippery",
"flexible"
] | 0 | Select the best answer. | closed choice | grade3 | natural science | physics | Materials | Compare properties of objects | An object has different properties. A property of an object can tell you how it looks, feels, tastes, or smells. Properties can also tell you how an object will behave when something happens to it.
Different objects can have properties in common. You can use these properties to put objects into groups. | Look at each object.
For each object, decide if it has that property.
A slippery object is hard to hold onto or stand on. The log and the velcro are not slippery.
A rough object feels scratchy when you touch it. All three objects are rough.
A flexible object can be folded or bent without breaking easily. The velcro is ... |
train/2186 | Complete the text to describe the diagram.
Solute particles moved in both directions across the permeable membrane. But more solute particles moved across the membrane (). When there was an equal concentration on both sides, the particles reached equilibrium. | [
"to the right than to the left",
"to the left than to the right"
] | 1 | The diagram below shows a solution with one solute. Each solute particle is represented by a purple ball. The solution fills a closed container that is divided in half by a membrane. The membrane, represented by a dotted line, is permeable to the solute particles.
The diagram shows how the solution can change over time... | closed choice | grade6 | natural science | chemistry | Solutions | Diffusion across membranes | In a solution, solute particles move and spread throughout the solvent. The diagram below shows how a solution can change over time. Solute particles move from the area where they are at a higher concentration to the area where they are at a lower concentration. This movement happens through the process of diffusion.
A... | Look at the diagram again. It shows you how the solution changed during the process of diffusion.
Before the solute particles reached equilibrium, there were 5 solute particles on the left side of the membrane and 7 solute particles on the right side of the membrane.
When the solute particles reached equilibrium, there... |
train/2187 | Which is this organism's scientific name? | [
"Acrochordus granulatus",
"marine file snake"
] | 0 | This organism is Acrochordus granulatus. It is also called a marine file snake. | 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,... | Acrochordus granulatus is written in italics. The first word is capitalized, and the second word is not.
So, Acrochordus granulatus is the scientific name. |
train/2188 | What is the name of the colony shown? | [
"New Hampshire",
"Massachusetts",
"Connecticut",
"Wisconsin"
] | 1 | closed choice | grade4 | 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/2189 | Is a slide a solid or a liquid? | [
"a solid",
"a liquid"
] | 0 | 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 slide is a solid. A solid has a size and shape of its own.
A slide has a size and shape of its own, even when you sit on it. | |
train/2190 | Complete the sentence.
The word "antebellum" means (). | [
"before the war",
"before the feast",
"after the long peace",
"after the election"
] | 0 | The time period in United States history between 1820 and 1861 is often called the antebellum period. During the antebellum period, the North and South became more divided. In the following questions, you learn more about the changes that happened during the antebellum period.
The following table shows other words that... | closed choice | grade8 | social science | us-history | The Antebellum period | Causes of the Civil War: Missouri Compromise to Bleeding Kansas | Look at the underlined parts of the table.
All the words that use the root "ante" mean to come before something else. So, the root ante means "before."
All the words that use the root "bellum" mean to fight or cause war.So, the root bellum means "war."
So, the word "antebellum" means "before the war." The antebellum pe... | |
train/2191 | Which country is highlighted? | [
"Barbados",
"Saint Lucia",
"Saint Vincent and the Grenadines",
"the Dominican Republic"
] | 0 | closed choice | grade8 | social science | geography | The Americas: geography | Identify and select countries of the Caribbean | This country is Barbados. | ||
train/2192 | Is the following statement about our solar system true or false?
Three-quarters of the planets are larger than Venus. | [
"true",
"false"
] | 1 | Use the data to answer the question below. | true-or false | grade6 | natural science | earth-science | Astronomy | Analyze data to compare properties of planets | A planet's volume tells you the size of the planet.
The primary composition of a planet is what the planet is made mainly of. In our solar system, planets are made mainly of rock, gas, or ice. | The table tells you that there are five planets larger than Venus: Earth, Jupiter, Saturn, Uranus, and Neptune. There are eight planets total. Five-eighths is less than three-quarters. So, five-eighths of the planets are larger than Venus. |
train/2193 | Does this passage describe the weather or the climate? | [
"weather",
"climate"
] | 0 | Figure: Grand Canyon.
The Grand Canyon is a steep, wide canyon that receives many visitors each year. On August 7, 1981, the temperature on the canyon floor reached 120°F!
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.
The Grand Canyon is a steep, wide canyon that receives many visitors each year. On August 7, 1981, the temperature on the canyon floor reached 120°F!
The underlined part of the passage tells you about the temperature in the Grand Canyon on a specific day in 1981. This passage describes the a... |
train/2194 | 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 shapes. | closed choice | grade7 | natural science | physics | Velocity, acceleration, and forces | Compare magnitudes of magnetic forces | Magnets can pull or push on each other without touching. When magnets attract, they pull together. When magnets repel, they push apart. These pulls and pushes between magnets are called magnetic forces.
The strength of a force is called its magnitude. The greater the magnitude of the magnetic force between two magnets,... | The magnets in Pair 2 attract. The magnets in Pair 1 repel. But whether the magnets attract or repel affects only the direction of the magnetic force. It does not affect the magnitude of the magnetic force.
Distance affects the magnitude of the magnetic force. When there is a greater distance between magnets, the magni... |
train/2195 | 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."
] | 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 | 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,... | Distance affects the magnitude of the magnetic force. When there is a greater distance between magnets, the magnitude of the magnetic force between them is smaller.
There is a greater distance between the magnets in Pair 1 than in Pair 2. So, the magnitude of the magnetic force is smaller in Pair 1 than in Pair 2. |
train/2196 | Which better describes the Lost City ecosystem? | [
"It has no sunlight. It also has organisms that crawl or stick to the ground.",
"It has shallow water. It also has organisms that crawl or stick to the ground."
] | 0 | Figure: Lost City.
Lost City is a deep sea ecosystem in the mid-Atlantic Ocean. | 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 | The deep sea is a type of ecosystem. Deep sea ecosystems have the following features: water at the bottom of the ocean, no sunlight, and organisms that crawl or stick to the ground. So, Lost City has no sunlight. It also has organisms that crawl or stick to the ground. |
train/2197 | Look at the models of molecules below. Select the elementary substance. | [
"benzene",
"chloromethane",
"hydrogen"
] | 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/2198 | Which country is highlighted? | [
"Grenada",
"Saint Vincent and the Grenadines",
"Trinidad and Tobago",
"Haiti"
] | 0 | closed choice | grade6 | social science | geography | The Americas: geography | Identify and select countries of the Caribbean | This country is Grenada. | ||
train/2199 | What is the capital of North Dakota? | [
"Madison",
"Indianapolis",
"Des Moines",
"Bismarck"
] | 3 | closed choice | grade4 | social science | geography | State capitals | Identify state capitals of the Midwest | Bismarck is the capital of North Dakota. |
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