Hydroelectric and Tides

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How is electricity produced in a hydroelectric power station?
Water is held back behind a dam. When it is released, it passes through turbines that turns a generator, generating electricity
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Give two environmental problems caused by hydroelectric power stations
Reservoirs look ugly when dried up/Rotting vegetation releases methane and carbon dioxide/Loss of habitat for species and land for humans due to flooding
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Where are hydroelectric schemes normally used and why?
Remote areas because it's useful when generating electricity on a small scale
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Explain how surplus energy is stored using pumped storage
At night, water from a lower reservoir is pumped back up to the upper reservoir
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Explain how tidal barrages can be used to generate electricity?
These are big dams built river estuaries with turbines in them. The turbines are connected to generators, generating electricity. The tides fill up the estuary, turning the turbines
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Give two advantages of using tidal barrages
Fairly reliable and cause no atmospheric pollution
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Give two disadvantages of using tidal barrages
Prevent free access to boats and wildlife/Spoil the view/Don't work when the water level is the same either side of the barrage
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Other cards in this set

Card 2

Front

Give two environmental problems caused by hydroelectric power stations

Back

Reservoirs look ugly when dried up/Rotting vegetation releases methane and carbon dioxide/Loss of habitat for species and land for humans due to flooding

Card 3

Front

Where are hydroelectric schemes normally used and why?

Back

Preview of the front of card 3

Card 4

Front

Explain how surplus energy is stored using pumped storage

Back

Preview of the front of card 4

Card 5

Front

Explain how tidal barrages can be used to generate electricity?

Back

Preview of the front of card 5
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