Conservation of Natural Resources

Clothes are often made from cotton, which is

grown from a plant. What kind of resource is

cotton?

• Chemical

• Renewable

• Nonrenewable

• mineral

Most energy resources used by humans are

nonrenewable. Which of the following is NOT a

nonrenewable energy resource?

• Natural gas

• coal

• oil

• wind

Which of the following best explains why trees

are called a renewable resources?

• If a tree is cut down, the animals that depended

  on the tree will help the tree grow back.

• Only humans use trees, so tree populations will

  never fall below the number that are needed.

• If a tree is cut down, a new tree can be planted

  in its place

• Only paper is made from trees, so the tree

  population will never run out.

Which of these is a nonrenewable resource?

• oxygen

• sugar

• aluminum

• cotton

Which of these is a renewable energy source?

• uranium

• natural gas

• ethanol

• coal

Terra's teacher wants her to design a car that can

be powered by a renewable resource. Which of

the following energy sources would Terra NOT

want to use?

• sunlight

• wind

• gasoline

• corn

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Sammy's dad had to cut down a dead tree in

their backyard. If Sammy's dad wants to save

wood, then the best thing he can do is

• use parts of the tree to build something instead

  of buying it new.

• put the pieces of the tree into the trash.

• set the tree on fire after it was cut down.

• let the tree lie on the ground in the backyard to

  break down into soil.

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Why are trees a natural resource?

• because they come from earth

• because they are used for many things

• because they are made by humans

• because they can never be replaced

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How is the atmosphere involved in the

greenhouse effect?

• It transforms light energy from the Sun into

  thermal energy that warms the surface of Earth.

• Gases magnify the heat of the Sun as it passes

  down through Earth's atmosphere.

• Gases in the atmosphere trap and redirect heat

  reflected from the surface of Earth.

• Heat from the surface of Earth is absorbed by

  gases and radiated into space.

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What is one benefit of using solar power?

• It removes the need for using any electricity.

• It is less expensive than any other form of

  power.

• It works everywhere, because energy from the

  Sun is always available.

• It results in burning of less fossil fuels that

  pollute the environment.

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