Resources and Human Impact on Earth Note

What is the source of geothermal energy?

• sunlight heating surface waters

• the splitting of atoms to release energy

• natural underground reservoirs of steam and hot water

• very hot minerals deep underground

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The greenhouse gas carbon dioxide helps to

• deflect harmful radiation from space

• increase precipitation in arid areas

• form clouds in the atmosphere

• maintain warmth near Earth's surface

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The advantages of solar energy include the fact that it is

• nonrenewable

• non-polluting

• expensive

• absent at night

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The fuel for nuclear fission in nuclear reactors is

• petroleum

• carbon

• hydrogen

• uranium

What type of resources can be renewed in months or years?

• expendable

• recyclable

• nonrenewable

• renewable

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Which of the following is NOT an advantage of solar energy?

• it is cheap to install

• it is renewable

• it is non-polluting

• it can directly heat water

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What is a drawback of wind energy?

• carbon production

• birds deaths

• water pollution

• earthquakes

How does a hydroelectric plant produce energy?

• fluid is extracted from deep mines

• atoms are split by neutrons

• falling water turns a turbine

• methane deposits are burned

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The pictures show a forest before and after deforestation, a process where many trees are cut down.

Which of the following best explains why trees are called a renewable resources?

• If a tree is cut down, a new tree can be planted in its place.

• 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.

• Only paper is made from trees, so the tree population will never run out.

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Which of the following is a nonrenewable resource?

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