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Sources of Energy
6th Grade Science Sources of Energy
| Question | Answer |
|---|---|
| Energy resources that can be recycled or replaced by natural processes in less than about 100 years are considered _____. | renewable |
| Energy from the sun is (renewable/non-renewable) and it doesn't cause _____. | pollution |
| Enough energy from the _____ reaches Earth in an _____ to supply all the energy in the world uses and one year. | sun hour |
| Energy from the sun is called _____. | solar energy |
| Solar calculators are powered by solar cells, which collect light and change it into _____. | electricity |
| Nonpolluting, _____ and abundant solar energy sounds wonderful. | renewable |
| Solar energy has some serious drawbacks. Solar cells can't work at _____. | night |
| Different parts of the Earth receive _____ amounts of solar energy. | different |
| Some scientists think that the best solution to energy problems might be to use _____ _____ and _____ in combination with other energy resources. | fossil fuels ? |
| Today, windmills are used to generate _____ worldwide. | electricity |
| In the U.S., regions of the Northeast, the _____, the Great Plains, and the _____ have been identified as having wind conditions best suited to using wind power. | Midwest West |
| Wind is _____. It does not harm the _____ or produce waste. | non-polluting environment |
| Only a few regions of the world have _____ strong enough to generate electricity. | winds |
| The production of electricity using water is called _____ _____. | hydroelectric power |
| The river water that backs up behind a dam creates a _____ or large reserve of water. | reservoir |
| Hydroelectric power doesn't cause pollution and it is _____. | renewable |
| Hydroelectric power as an energy source has its problems. When dams are built, the reservoir located behind the dam can fill with _____. | sediiment |
| Land above the dam flooded and wildlife _____ are disturbed. | habitats |
| Power plants have already been _____ near most rivers. | built |
| The heat from magma and hot rock that surrounds it is called _____ _____. | geothermal energy. |
| People in Iceland and California use the _____ _____ and steam from geysers to heat their homes. | hot water |
| Geothermal energy has disadvantages. It can release hot, salty water at Earth's surface, which can be harmful to nearby _____ and _____. | plants animals |
| Only a few places have _____ near the Earth's surface. | magma |
| Nuclear energy is produced by splitting the _____ of certain elements. | nuclei |
| The most commonly used fuel in nuclear power plants is _____. | uranium |
| Nuclear energy also produces highly _____ nuclear waste. | radioactive |
| This waste contains materials that can cause _____ or have other harmful effects on living things. | cancer |
| Because of potential problems in storing nuclear waste, nuclear energy has seen limited use in the _____ _____. | United States |
| _____% of the world's energy is supplied by fossil fuels. | 90 |
Created by:
blakelyk
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