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Renewable Energy
Sources
| Question | Answer |
|---|---|
| What is wind power? | involves putting lots of wind turbines in exposed places e.g. coasts. each turbine has its own generator inside it , the electricity is generated directly from the wind turning the blades which turn the generator |
| what are advantages of wind power? | - no pollution - no permanent damage to the landscape - no fuel costs |
| what are the disadvantages of wind power? | - spoil the view (you need 1500 wind turbines) - very noisy - no power when the wind stops - initial cost is expensive |
| what are solar cells/panels? | they generate electric currents directly from sunlight |
| What are advantages of solar panels? | - no pollution - reliable source in sunny countries - no running costs |
| what are disadvantages of solar panels? | - not a reliable source in cloudy countries - only work in the daytime - initial costs are high |
| what is hydroelectric power? | uses falling rainwater and allowed through turbines |
| what are advantages of hydroelectric power? | - no fuel costs - reliable especially in great Britain - can provide an immediate response to an increased demand for electricty |
| what are the disadvantages of hydroelectric power? | - requires flooding of a valley by building a big dam - loss of habitat for some species - very unsightly - initial costs are high |
| what is pumped storage? | spare night time electricity is used to pump water up to a higher reservoir this then can be quickly released during periods of high demand. a way of storing energy which has already been generated |
| what is wave power? | lots of wave powered turbines around the coast. as waves come in to the shore they provide and up and down motion which can be used to drive a generator |
| what are advantages of wave power? | - no pollution - fairly reliable - no fuel costs |
| what are the disadvantages of wave power? | - spoil the view - hazard to boats - initial costs are high |
| what are tidal barrages? | big dams built across river estuaries with turbines in them. as the tide comes in it fills up the estuary and drives the turbines. |
| what are the advantages of tidal barrages? | - no pollution - fairly reliable good at storing energy ready for periods of high demand - no fuel costs |
| what are the disadvantages of tidal barrages? | - spoil the view - initial costs are high - alter the habitat of wildlife |
| what is geothermal power? | heat from underground, only possible in volcanic areas. steam and hot water rise to the surface and are used to drive a generator |
| what are advantages of geothermal power? | - no environmental problems |
| what are disadvantages of geothermal power? | - aren't many suitable locations - cost is high |
| what are bio fuels? | made from plants and waste, they are burnt to heat up water |
Created by:
rv1
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