5953776
Description
Flashcards by Smart Energy Florida, updated more than 1 year ago
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Created by Smart Energy Florida
over 8 years ago
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| Question | Answer |
| Why do we say fossil fuels are "nonrenewable"? | Because they draw on finite resources that will eventually dwindle, becoming too expensive or too environmentally damaging to retrieve. |
| Solar and wind energy are... | Renewable energy resources. |
| Why do we call some energy resources "renewable"? | Because they are constantly replenished and will never run out. |
| Which are the five most commonly used renewable energy sources? | - Biomass - Hydropower - Geothermal - Wind - Solar |
| What is biomass? | Biomass is organic material that comes from plants and animals |
| How does biomass work? | When biomass is burned, the chemical energy in it is released as heat. Also biomass can be converted to liquid biofuels and biogas. |
| What is the source of hydroelectric power? | Water. |
| What does hydropower include? | Tidal power, wave power, and ocean thermal energy conversion. |
| What is geothermal energy? | Is heat from within the earth that can be recovered as steam or as hot water. |
| Where is geothermal energy generated? | In the Earth's core. |
| What is wind energy? | Is the process by which the wind is used to generate mechanical power or electricity. |
| How does a turbine work? | The wind turns the blades, which spin a shaft, which connects to a generator and makes electricity. |
| How solar energy can be converted into electricity? | In two ways: - With solar cells - By concentrating solar energy to heat a fluid |
| What is said to be the future of modern energy supply? | Solar and smart. |
| What do smart grids will be able to do? | They will control and monitor power generation, store, distribute and consume electricity. |
| Why does renewable energy play an important role in reducing pollution? | Because they do not directly emit greenhouse gases. |
| What are greenhouse gases? | Many chemical compounds found in the earth’s atmosphere that absorb infrared radiation and trap its heat in the atmosphere. |
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