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8th Energy Resources
8th grade unit vocabulary about various energy resources
| Term | Definition |
|---|---|
| Renewable Resources | any natural resource (such as wood or solar energy) that can be replenished naturally with the passage of time |
| Nonrenewable resources | Minerals, fossil fuels, uranium and other materials present in essentially fixed amounts (within human time scales) in our environment. |
| Geothermal energy | Hot rocks underground heat water to produce steam. We drill holes down to the hot region, steam comes up, is purified and used to drive turbines, which drive electric generators |
| Fossil Fuels | Coal, Oil & Gas, they have been formed from the fossilized remains of prehistoric plants and animals. |
| Solar Power | harvesting the sun's energy to make electricity |
| Transfer of Energy | Energy can change forms: light, chemical, mechanical, etc. |
| Photovoltaic cells | convert light directly into electricity (other name solar cells) |
| Solar cells | convert light directly into electricity (other name photovoltaic cells) |
| Solar Reflectors | mirrors used to concentrate solar energy for industrial use and for the generation of electric energy |
| Nuclear Energy | generated using Uranium, produces huge amounts of energy from small amounts of fuel |
| Wind Energy | harvested by building a tall tower, with a large propellor that generates electricity. Wind is caused by the uneven heating of the atmosphere. |
| Hydroelectricity | Water is allowed to flow through tunnels in the dam, to turn turbines and thus drive generators |
| Biomass | Plant and animal waste is used to produce fuels such as methanol, natural gas and oil. |
| Tidal energy | a huge dame (called a Barrage) is built across a river estuary. When the tide goes in and out, the water flows through the tunnels in the dam and turns turbines that produce electricity |
| 1st Law of thermodynamics | the total amount of energy in the universe is constant. all of the energy has to end up somewhere, either in the original form or in a different from. the amount of energy in a system, the amount lost as waste heat, and the efficiency of the system. |
Created by:
clupton
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