Physics 1b

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  • Created by: kelz0209
  • Created on: 09-04-14 11:57
Name three different renewable energy sources.
Wind/waves/tide/hydroelectric/solar/geothermal/food/biofuels.
1 of 14
Explain how pumped storage systems work.
'Spare' night-time electricity is used to pump water up to a resevoir. This can then be released quickly when extra electricity is needed.
2 of 14
Give two ways in which using coal as an energy source causes problems.
Releases greenhouse gases/contributes to global warming/causes acid rain/coal mining damages landscape.
3 of 14
Describe the major problems with using nuclear fuel to generate electricity.
Nuclear fission results in the production of nuclear waste-difficult and expensive to dispose of safely/nuclear power plant has high set-up/decommissioning costs and a long set-up/nuclear power plants-risk of nuclear catastrophe.
4 of 14
Explain what is meant by biofuels.
Organic matter that can be burnt to release energy.
5 of 14
Geothermal energy can be described as a renewable energy source. Describe what is meant by geothermal energy.
Heat energy from inside the earth.
6 of 14
Describe what 'renewable energy' means.
The source of energy will never run out.
7 of 14
Give two disadvantages of using geothermal energy to generate electricity.
There are a few sustainable locations for geothermal power plants, since they can only be built in volcanic areas with hot rocks close to the surface. The cost to set up a geothermal power plant is high relative to the energy available.
8 of 14
Old coal-fired power station output=2MW(million watts).Electricity generating company plans to replace it with wind turbines+its maximum output=4000W each.Calculate minimum number of wind turbines needed to replace the old power station.
2000000/4000=500
9 of 14
Suggest why more wind turbines than this might be needed in reality.
If the wind isn't blowing strongly, the turbines will not generate as much as 4000W each
10 of 14
Give two reasons why some people might oppose the wind farm developement.
They might think it would spoil the view(visual pollution)/ cause noise pollution/ kill or disturb local wildlife.
11 of 14
The wind turbines will need to be connected to the National Grid. Explain why the National Grid uses step-up transformers.
Step up transformers step up the voltage of the electricity supply, allowing the electricity to be transmitted at high voltages(and low currents) to reduce the amount of energy lost as heat.
12 of 14
Inhabitants of a remote island don't have the resources to build a nuclear power plant-no fossil fuels.Islanders considered using wind,solar+hydroelectric power to generate electricity.Name two other renewable energy sources they could use.
Wave/tidal/geothermal/biofuels.
13 of 14
The islanders decide that both solar and hydroelectric power could reliably generate enough electricity for all their needs. Suggest two other factors they should consider when deciding which method of electricity to use.
Set-up time/set-up costs/running costs/impact on environment/social impact.
14 of 14

Other cards in this set

Card 2

Front

Explain how pumped storage systems work.

Back

'Spare' night-time electricity is used to pump water up to a resevoir. This can then be released quickly when extra electricity is needed.

Card 3

Front

Give two ways in which using coal as an energy source causes problems.

Back

Preview of the front of card 3

Card 4

Front

Describe the major problems with using nuclear fuel to generate electricity.

Back

Preview of the front of card 4

Card 5

Front

Explain what is meant by biofuels.

Back

Preview of the front of card 5
View more cards

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