Topic 1b - energy resources (3. hydroelectricity, waves tides)

Question 1

what are hydroelectric power stations

Answer 1

generating electricity using hydroelectric power stations usually requires the flooding of a valley by building a big dam.
kinetic energy store of falling water.

Question 2

advantages of hydroelectric power station

Answer 2

no pollution, can provide an immediate response to an increased demand for electricity, no problem of reliability except when there is a drought, initial costs are high but no fuel costs and ,animal running costs

Question 3

disadvantages of hydroelctric

Answer 3

although there is no pollution, the flooding leads to rotting of vegetation and possible loss of habitat

Question 4

what is wave power

Answer 4

to generate electricity using water waves. need loads of small wave-powered turbines located around the coast. As waves come in it provides an up and down motion which can be used to drive a generator.

Question 5

advantages of wave power

Answer 5

no pollution, initial costs are high but no fuel costs and minimal running costs

Question 6

disadvantages of wave power

Answer 6

disturbing marine habitats, hazard to boats, unreliable as waves tend to die out

Question 7

what are tidal barrages

Answer 7

tidal barrages are big dams with turbines in them. as the tide comes in it fills up the estuaries. the water is then allowed out at a controlled speed.

Question 8

advantages of tidal barrages

Answer 8

no pollution, reliable

Question 9

disadvantages of tidal barrages

Answer 9

initial costs are high, free access of boats, depending on the tide height thats how much electricity is produced