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Lecture: 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 que... | 0A | |
Lecture: 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. Doin... | 1B | |
Lecture: 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
Question: Which better describes ... | 1B | |
Question: What is the capital of Michigan?
Choices:
A. Detroit
B. Lansing
C. Des Moines
D. Lincoln
Answer with the letter. | 1B | |
Lecture: 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 oth... | 0A | |
Lecture: 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... | 2C | |
Lecture: 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 ani... | 1B | |
Lecture: An object has different properties. A property of an object can tell you how it looks, feels, tastes, or smells.
Different objects can have the same properties. You can use these properties to put objects into groups.
Question: Which property do these two objects have in common?
Hint: Select the better answer.... | 0A | |
Question: What is the capital of Maryland?
Choices:
A. Annapolis
B. Athens
C. Davenport
D. Dallas
Answer with the letter. | 0A | |
Lecture: An adaptation is an inherited trait that helps an organism survive or reproduce. Adaptations can include both body parts and behaviors.
The shape of a bird's beak is one example of an adaptation. Birds' beaks can be adapted in different ways. For example, a sharp hooked beak might help a bird tear through meat... | 1B | |
Lecture: 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
Question: Which better describes ... | 0A | |
Lecture: 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 ma... | 2C | |
Lecture: 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.
Questio... | 1B | |
Lecture: 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.
The food chain begins with the producer. A producer can change matter that is not food into food. Many producers use carbon dioxide, water, and sunlight to make ... | 1B | |
Question: Which country is highlighted?
Choices:
A. New Zealand
B. Papua New Guinea
C. Solomon Islands
D. Australia
Answer with the letter. | 3D | |
Lecture: 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 ... | 0A | |
Lecture: 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.
Question: Select the bird below.
Hint: Birds have feathers, two wings, and a bea... | 1B | |
Lecture: A continent is one of the seven largest areas of land on earth.
Question: Which continent is highlighted?
Choices:
A. South America
B. Antarctica
C. Africa
D. Asia
Answer with the letter. | 1B | |
Lecture: A material is a type of matter. Wood, glass, metal, and plastic are common materials.
Question: Which material is this aluminum foil made of?
Choices:
A. plastic
B. metal
Answer with the letter. | 1B | |
Question: What is the name of the colony shown?
Choices:
A. Connecticut
B. North Carolina
C. Maryland
D. Indiana
Answer with the letter. | 1B | |
Question: Which state is highlighted?
Choices:
A. Oregon
B. California
C. Montana
D. Nevada
Answer with the letter. | 2C | |
Lecture: 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 ... | 0A | |
Question: What is the capital of Vermont?
Choices:
A. Olympia
B. Concord
C. Burlington
D. Montpelier
Answer with the letter. | 3D | |
Lecture: 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.
Q... | 1B | |
Lecture: 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 th... | 0A | |
Lecture: 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 magnet... | 1B | |
Lecture: 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 sou... | 0A | |
Question: What can Perry and Antonio trade to each get what they want?
Hint: 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.
Perry and Antonio open their lunch boxes in the scho... | 2C | |
Lecture: 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 notatio... | 0A | |
Lecture: 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 ... | 2C | |
Lecture: 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... | 2C | |
Lecture: 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 magnet... | 0A | |
Lecture: 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 sou... | 0A | |
Question: What is the capital of Oklahoma?
Choices:
A. Little Rock
B. Tulsa
C. Oklahoma City
D. Trenton
Answer with the letter. | 2C | |
Lecture: 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 plan... | 0A | |
Question: What is the name of the colony shown?
Choices:
A. West Virginia
B. Virginia
C. Delaware
D. North Carolina
Answer with the letter. | 1B | |
Lecture: 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 plan... | 1B | |
Lecture: An organism's genes contain information about its proteins. Each gene encodes, or contains the instructions for making, one protein or a group of proteins.
A permanent change in a gene is called a mutation. Because a mutation changes a gene, the mutation may change the structure of the protein encoded by that ... | 1B | |
Lecture: Scientists record climate data from places around the world. Temperature is one type of climate data. Scientists collect data over many years. They can use this data to calculate the average temperature for each month. The average temperature can be used to describe the climate of a location.
A line graph can ... | 1B | |
Lecture: 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 ... | 1B | |
Lecture: 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 oth... | 1B | |
Lecture: 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. ... | 1B | |
Lecture: 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... | 0A | |
Lecture: 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... | 2C | |
Lecture: An adaptation is an inherited trait that helps an organism survive or reproduce. Adaptations can include both body parts and behaviors.
The shape of a bird's beak is one example of an adaptation. Birds' beaks can be adapted in different ways. For example, a sharp hooked beak might help a bird tear through meat... | 0A | |
Question: What is the capital of Pennsylvania?
Choices:
A. Pittsburgh
B. Philadelphia
C. Harrisburg
D. Montpelier
Answer with the letter. | 2C | |
Lecture: Many plants have flowers. These plants can use their flowers to reproduce, or make new plants like themselves. How do plants use their flowers to reproduce?
First, the male part of the flower makes pollen, and the female part makes eggs. Animals, wind, or water can move pollen. Pollination is what happens when... | 1B | |
Question: What is the capital of Maryland?
Choices:
A. Jefferson City
B. Albany
C. Annapolis
D. Dover
Answer with the letter. | 2C | |
Lecture: 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 ma... | 1B | |
Lecture: An organism's genes contain information about its proteins. Each gene encodes, or contains the instructions for making, one protein or a group of proteins.
A permanent change in a gene is called a mutation. Because a mutation changes a gene, the mutation may change the structure of the protein encoded by that ... | 1B | |
Lecture: 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... | 1B | |
Lecture: 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 som... | 1B | |
Question: Which country is highlighted?
Choices:
A. Samoa
B. Papua New Guinea
C. New Zealand
D. Australia
Answer with the letter. | 2C | |
Lecture: 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 ma... | 0A | |
Lecture: Oceans are huge bodies of salt water. The world has five oceans. All of the oceans are connected, making one world ocean.
Question: Which ocean is highlighted?
Choices:
A. the Atlantic Ocean
B. the Pacific Ocean
C. the Arctic Ocean
D. the Southern Ocean
Answer with the letter. | 0A | |
Lecture: 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 plan... | 0A | |
Question: What is the capital of Rhode Island?
Choices:
A. Augusta
B. Newport
C. Trenton
D. Providence
Answer with the letter. | 3D | |
Lecture: 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... | 0A | |
Lecture: A continent is one of the major land masses on the earth. Most people say there are seven continents.
Question: Which continent is highlighted?
Choices:
A. Europe
B. South America
C. North America
D. Antarctica
Answer with the letter. | 2C | |
Lecture: 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.
Question: Which property matches this object?
Hint: Select the better answer.
Choices:
A. scratchy
B. yellow
Answ... | 1B | |
Lecture: 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 ... | 1B | |
Question: What is the name of the colony shown?
Choices:
A. Maryland
B. New Hampshire
C. South Carolina
D. Georgia
Answer with the letter. | 0A | |
Lecture: 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. Groupin... | 1B | |
Lecture: An object has different properties. A property of an object can tell you how it looks, feels, tastes, or smells.
Different objects can have the same properties. You can use these properties to put objects into groups.
Question: Which property do these two objects have in common?
Hint: Select the better answer.... | 1B | |
Lecture: 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 ... | 0A | |
Lecture: 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 t... | 1B | |
Lecture: An adaptation is an inherited trait that helps an organism survive or reproduce. Adaptations can include both body parts and behaviors.
The shape of an animal's feet is one example of an adaptation. Animals' feet can be adapted in different ways. For example, webbed feet might help an animal swim. Feet with th... | 1B | |
Question: What is the capital of Nevada?
Choices:
A. Carson City
B. Trenton
C. Las Vegas
D. Salem
Answer with the letter. | 0A | |
Question: What can Patty and Tisha trade to each get what they want?
Hint: 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.
Patty and Tisha open their lunch boxes in the school c... | 1B | |
Lecture: 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 decrease... | 0A | |
Lecture: 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 ... | 1B | |
Lecture: 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.
Question: Is the following statement about our solar system true or false?
50% of the planets are made mainly of gas.
... | 0A | |
Question: According to the text, what evidence of a volcanic eruption did the captain observe?
Hint: Before sunrise on November 14, 1963, the crew of the fishing boat Isleifur II had just finished putting their lines in the ocean off the southern coast of Iceland. As the crew waited to have breakfast, a strong smell of... | 1B | |
Lecture: 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 t... | 0A | |
Lecture: 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 lo... | 2C | |
Lecture: 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 t... | 4E | |
Question: Which country is highlighted?
Choices:
A. Nauru
B. New Zealand
C. Kiribati
D. Australia
Answer with the letter. | 3D | |
Question: What is the capital of Kentucky?
Choices:
A. Atlanta
B. Frankfort
C. Carson City
D. Nashville
Answer with the letter. | 1B | |
Lecture: 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.
Q... | 0A | |
Question: What is the capital of Connecticut?
Choices:
A. Providence
B. Albany
C. Hartford
D. Bridgeport
Answer with the letter. | 2C | |
Lecture: 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 oth... | 2C | |
Lecture: 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 ... | 1B | |
Question: What is the capital of New Hampshire?
Choices:
A. Newport
B. Concord
C. Boston
D. Albany
Answer with the letter. | 1B | |
Lecture: A continent is one of the major land masses on the earth. Most people say there are seven continents.
Question: Which continent is highlighted?
Choices:
A. Africa
B. North America
C. Europe
D. Australia
Answer with the letter. | 3D | |
Question: What is the capital of Kansas?
Choices:
A. Frankfort
B. Des Moines
C. Topeka
D. Jefferson City
Answer with the letter. | 2C | |
Question: What is the capital of Pennsylvania?
Choices:
A. Pittsburgh
B. Harrisburg
C. Hartford
D. Nashville
Answer with the letter. | 1B | |
Lecture: 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.
Question: Is the following statement about our solar system true or false?
There are twice as many ice planets as rock... | 0A | |
Lecture: 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 notatio... | 0A | |
Lecture: 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... | 1B | |
Question: What can Lexi and Cindy trade to each get what they want?
Hint: 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.
Lexi and Cindy open their lunch boxes in the school caf... | 0A | |
Question: Which term matches the picture?
Hint: Read the text.
When you think of muscles, you might think of the ones in your legs or arms that you use to help you move. These types of muscles are called striated muscles. If you look at them under a microscope, the cells appear rectangular and striped. There are other ... | 1B | |
Lecture: 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.
Question: Is the following statement about our solar system true or false?
The volume of Mars is more than three times... | 1B | |
Lecture: 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... | 0A | |
Question: Which state is highlighted?
Choices:
A. California
B. New Mexico
C. Hawaii
D. Nevada
Answer with the letter. | 0A | |
Lecture: 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 th... | 0A | |
Lecture: 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 ... | 0A | |
Lecture: 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 th... | 1B | |
Question: What is the capital of Oregon?
Choices:
A. Phoenix
B. Portland
C. Columbus
D. Salem
Answer with the letter. | 3D | |
Question: Which country is highlighted?
Choices:
A. Solomon Islands
B. Nauru
C. Vanuatu
D. Fiji
Answer with the letter. | 2C | |
Lecture: 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.
Question: Which i in column 1... | 0A |
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