8th Grade Science - 8th Grade Science
Card 0 of 48
Select the option that is an example of a renewable energy source.
Select the option that is an example of a renewable energy source.
Renewable energy sources are sources of energy that are naturally replaced or energy sources that won't run out.
Wind is the only example of an energy source that won't run out and is the correct answer.
Renewable energy sources are sources of energy that are naturally replaced or energy sources that won't run out.
Wind is the only example of an energy source that won't run out and is the correct answer.
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Roughly, how old is the planet Earth?
Roughly, how old is the planet Earth?
Planet Earth is roughly 
Planet Earth is roughly
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What orbits the Earth?
What orbits the Earth?
The moon orbits the Earth.
The moon orbits the Earth.
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What orbits the Sun?
What orbits the Sun?
The Earth orbits the sun.
The Earth orbits the sun.
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Roughly, how old is the planet Earth?
Roughly, how old is the planet Earth?
Planet Earth is roughly
Planet Earth is roughly
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What orbits the Earth?
What orbits the Earth?
The moon orbits the Earth.
The moon orbits the Earth.
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What orbits the Sun?
What orbits the Sun?
The Earth orbits the sun.
The Earth orbits the sun.
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Select the option that is an example of a renewable energy source.
Select the option that is an example of a renewable energy source.
Renewable energy sources are sources of energy that are naturally replaced or energy sources that won't run out.
Wind is the only example of an energy source that won't run out and is the correct answer.
Renewable energy sources are sources of energy that are naturally replaced or energy sources that won't run out.
Wind is the only example of an energy source that won't run out and is the correct answer.
Compare your answer with the correct one above
Fill in the blank:
When a species becomes better suited to its environment, it's said that the species has .
Fill in the blank:
When a species becomes better suited to its environment, it's said that the species has .
Adaptation is the processes in which a species becomes better suited to its environment; thus, the correct answer is adapted.
When a species becomes better suited to its environment, it's said that the species has adapted.
Adaptation is the processes in which a species becomes better suited to its environment; thus, the correct answer is adapted.
When a species becomes better suited to its environment, it's said that the species has adapted.
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What is the process that enables organisms that are best suited for the environment to live and pass on their genetic traits.
What is the process that enables organisms that are best suited for the environment to live and pass on their genetic traits.
Natural Selection is the process that enables organisms that are best suited for the environment to live and pass on their genetic traits.
Natural Selection is the process that enables organisms that are best suited for the environment to live and pass on their genetic traits.
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What is characterized as a mistake or change in an organism's DNA?
What is characterized as a mistake or change in an organism's DNA?
A mutation is characterized as a mistake or change in an organism's DNA.
A mutation is characterized as a mistake or change in an organism's DNA.
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Which of the following is a cause of extinction?
Which of the following is a cause of extinction?
There are many causes of extinction. Agriculture, habitat fragmentation, and deforestations are all causes of extinction.
Agriculture causes extinction by emitting toxins into the environment.
Habitat fragmentation causes extinction by changing an animals habitat. Usually, habitat fragmentation is caused by development breaking apart an animal's habitat.
Deforestation causes extinction by taking away animals's habitats. Deforestation is when forests are cut down.
There are many causes of extinction. Agriculture, habitat fragmentation, and deforestations are all causes of extinction.
Agriculture causes extinction by emitting toxins into the environment.
Habitat fragmentation causes extinction by changing an animals habitat. Usually, habitat fragmentation is caused by development breaking apart an animal's habitat.
Deforestation causes extinction by taking away animals's habitats. Deforestation is when forests are cut down.
Compare your answer with the correct one above
Select the type of force that is being described:
A student pushing the teacher's desk across the room.
Select the type of force that is being described:
A student pushing the teacher's desk across the room.
There are many types of forces, but our answer choices include four types. In order to answer this question correctly, we need to be able to decipher between them.
Applied force is a force that is applied by a person to an object.
Gravity force is also known as the weight of the object. It's the force that allows a large object to attract another object towards itself.
Normal force is also known as supportive force. It is the force exerted upon an object that is in contact with another object, one object holds the other up.
Friction force is the force exerted by a surface as an object tries to moves across the surface.
Let's think about the scenario from the question. We have a student pushing a desk, which is an object, across the room. The student would have to apply some force to get the desk to move. Looking at the types of forces above, applied force fits this scenario best.
There are many types of forces, but our answer choices include four types. In order to answer this question correctly, we need to be able to decipher between them.
Applied force is a force that is applied by a person to an object.
Gravity force is also known as the weight of the object. It's the force that allows a large object to attract another object towards itself.
Normal force is also known as supportive force. It is the force exerted upon an object that is in contact with another object, one object holds the other up.
Friction force is the force exerted by a surface as an object tries to moves across the surface.
Let's think about the scenario from the question. We have a student pushing a desk, which is an object, across the room. The student would have to apply some force to get the desk to move. Looking at the types of forces above, applied force fits this scenario best.
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Select the type of force that is being described:
A person being kept on the ground.
Select the type of force that is being described:
A person being kept on the ground.
There are many types of forces, but our answer choices include four types. In order to answer this question correctly, we need to be able to decipher between them.
Applied force is a force that is applied by a person to an object.
Gravity force is also known as the weight of the object. It's the force that allows a large object to attract another object towards itself.
Normal force is also known as supportive force. It is the force exerted upon an object that is in contact with another object, one object holds the other up.
Friction force is the force exerted by a surface as an object tries to moves across the surface.
Let's think about the scenario from the question. What causes a person to be kept on the ground, rather than floating around? Gravity forces us towards the ground; thus, gravity force is the correct answer.
There are many types of forces, but our answer choices include four types. In order to answer this question correctly, we need to be able to decipher between them.
Applied force is a force that is applied by a person to an object.
Gravity force is also known as the weight of the object. It's the force that allows a large object to attract another object towards itself.
Normal force is also known as supportive force. It is the force exerted upon an object that is in contact with another object, one object holds the other up.
Friction force is the force exerted by a surface as an object tries to moves across the surface.
Let's think about the scenario from the question. What causes a person to be kept on the ground, rather than floating around? Gravity forces us towards the ground; thus, gravity force is the correct answer.
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Select the type of force that is being described:
A plate sitting on a table top.
Select the type of force that is being described:
A plate sitting on a table top.
There are many types of forces, but our answer choices include four types. In order to answer this question correctly, we need to be able to decipher between them.
Applied force is a force that is applied by a person to an object.
Gravity force is also known as the weight of the object. It's the force that allows a large object to attract another object towards itself.
Normal force is also known as supportive force. It is the force exerted upon an object that is in contact with another object, one object holds the other up.
Friction force is the force exerted by a surface as an object tries to moves across the surface.
Let's think about the scenario from the question. A plate is sitting on the table, they are in contact with one another and the table is keeping the plate from falling to the ground; thus, this is an example of normal force.
There are many types of forces, but our answer choices include four types. In order to answer this question correctly, we need to be able to decipher between them.
Applied force is a force that is applied by a person to an object.
Gravity force is also known as the weight of the object. It's the force that allows a large object to attract another object towards itself.
Normal force is also known as supportive force. It is the force exerted upon an object that is in contact with another object, one object holds the other up.
Friction force is the force exerted by a surface as an object tries to moves across the surface.
Let's think about the scenario from the question. A plate is sitting on the table, they are in contact with one another and the table is keeping the plate from falling to the ground; thus, this is an example of normal force.
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Select the type of force that is being described:
A marble rolling across the floor.
Select the type of force that is being described:
A marble rolling across the floor.
There are many types of forces, but our answer choices include four types. In order to answer this question correctly, we need to be able to decipher between them.
Applied force is a force that is applied by a person to an object.
Gravity force is also known as the weight of the object. It's the force that allows a large object to attract another object towards itself.
Normal force is also known as supportive force. It is the force exerted upon an object that is in contact with another object, one object holds the other up.
Friction force is the force exerted by a surface as an object tries to moves across the surface.
Let's think about the scenario from the question. We have a marble, an object, that is rolling across the floor, which is a surface. Based on the definitions of the types of forces above, friction force is the correct answer.
There are many types of forces, but our answer choices include four types. In order to answer this question correctly, we need to be able to decipher between them.
Applied force is a force that is applied by a person to an object.
Gravity force is also known as the weight of the object. It's the force that allows a large object to attract another object towards itself.
Normal force is also known as supportive force. It is the force exerted upon an object that is in contact with another object, one object holds the other up.
Friction force is the force exerted by a surface as an object tries to moves across the surface.
Let's think about the scenario from the question. We have a marble, an object, that is rolling across the floor, which is a surface. Based on the definitions of the types of forces above, friction force is the correct answer.
Compare your answer with the correct one above
What is the process that enables organisms that are best suited for the environment to live and pass on their genetic traits.
What is the process that enables organisms that are best suited for the environment to live and pass on their genetic traits.
Natural Selection is the process that enables organisms that are best suited for the environment to live and pass on their genetic traits.
Natural Selection is the process that enables organisms that are best suited for the environment to live and pass on their genetic traits.
Compare your answer with the correct one above
What is characterized as a mistake or change in an organism's DNA?
What is characterized as a mistake or change in an organism's DNA?
A mutation is characterized as a mistake or change in an organism's DNA.
A mutation is characterized as a mistake or change in an organism's DNA.
Compare your answer with the correct one above
Fill in the blank:
When a species becomes better suited to its environment, it's said that the species has .
Fill in the blank:
When a species becomes better suited to its environment, it's said that the species has .
Adaptation is the processes in which a species becomes better suited to its environment; thus, the correct answer is adapted.
When a species becomes better suited to its environment, it's said that the species has adapted.
Adaptation is the processes in which a species becomes better suited to its environment; thus, the correct answer is adapted.
When a species becomes better suited to its environment, it's said that the species has adapted.
Compare your answer with the correct one above
Which of the following is a cause of extinction?
Which of the following is a cause of extinction?
There are many causes of extinction. Agriculture, habitat fragmentation, and deforestations are all causes of extinction.
Agriculture causes extinction by emitting toxins into the environment.
Habitat fragmentation causes extinction by changing an animals habitat. Usually, habitat fragmentation is caused by development breaking apart an animal's habitat.
Deforestation causes extinction by taking away animals's habitats. Deforestation is when forests are cut down.
There are many causes of extinction. Agriculture, habitat fragmentation, and deforestations are all causes of extinction.
Agriculture causes extinction by emitting toxins into the environment.
Habitat fragmentation causes extinction by changing an animals habitat. Usually, habitat fragmentation is caused by development breaking apart an animal's habitat.
Deforestation causes extinction by taking away animals's habitats. Deforestation is when forests are cut down.
Compare your answer with the correct one above