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Questions on Energy Sources

Q11. The tides can be used to generate electricity. A dam is built across a river estuary, as shown below.

(a) The water is higher on one side of the dam than on the other. As the water begins to flow through the dam it turns a turbine. The turbine generates electricity. Describe the useful energy changes which take place in this process.

2 marks

(b) Explain why tides are classified as a renewable energy source.

1 mark

(c) Give one way, other than from the tides, of generating electricity by using the sea.

1 mark

(d) Apart from cost, give one advantage and one disadvantage of an oil-fired power station compared with a tidal power station.

2 marks

Maximum 6 marks