Earth and Human Activity

The diagram shows how nuclear power is transformed into electricity.

How does nuclear energy produce electricity?

• The heat from atoms fusing spins a turbine.

• Atoms in water break apart when they are boiled.

• Atoms in water fuse and cause water to boil.

• The heat from atoms splitting spins a turbine.

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NGSS.MS-PS3-4

Which renewable resource could produce more than all of the energy currently used by humans?

• biomass

• water

• solar

• wind

How do solar concentrators generate electricity?

• turn light energy into heat energy

• turn light energy into motion energy

• turn heat energy into motion energy

• turn heat energy into light energy

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Why are fossil fuels considered nonrenewable?

• They pollute air and water.

• They take a very long time to be replaced.

• They are burned to make electricity.

• They are made from once-living organisms.

What energy conversion does wind power use?

• motion energy to light energy

• motion energy to electrical energy

• light energy to chemical energy

• light energy to electrical energy

Nuclear energy is generated when __________.

• atoms are split apart

• heat makes steam

• heat spins a turbine

• atoms are fused together

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__________ is not a fossil fuel, but it is nonrenewable.

• Natural gas

• Coal

• Uranium

• Crude oil

What is an advantage of using renewable energy sources like the sun instead of nonrenewable energy sources?

• Existing power grids were constructed to depend more on renewable energy sources.

• Existing power lines connect people in remote areas to renewable energy sources.

• Renewable energy sources can be harvested at all times of day.

• Renewable energy sources cause less pollution to the environment.

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The pie chart shows U.S. energy consumption in 2015.

In 2015, the United States consumed the most energy from __________.

• hydroelectric

• natural gas

• petroleum

• biomass

This diagram shows the different energy sources used in the United States in history.

Which resource has decreased in use the most over time?

• other renewables

• natural gas

• nuclear

• coal