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9 Cards in this Set
- Front
- Back
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A hydroelectric power station uses two lakes.
As water flows from the top to the bottom lake it turns a turbine coupled to a generator that produces electricity.
What is the energy transformation that takes place as the water flows?
A Electrical energy to kinetic energy.
B Gravitational potential energy to kinetic energy.
C Kinetic energy to gravitational potential energy.
D Kinetic energy to heat energy. |
B
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Where does geothermal energy come from?
A Radioactive processes in nuclear power stations.
B Radioactive processes within the Earth.
C The decay of organic material.
D The movement of the tides. |
B
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Renewable energy sources can be used to generate electricity. However these sources are not always available.
Match words from the list with the numbers 1 to 4 in the table.
A hydroelectric scheme ……….
B solar cells ……….
C tidal barrage ……….
D wind farm ……….
Renewable energy source
Source is available to generate electricity …
1
only during the daylight
2
only when the weather is suitable
3
only during certain periods of the day and night
4
usually whenever it is needed
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A 4, B 1, C 3, D 2 |
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Wind energy, waves, tides, falling water and solar energy can all be used as energy sources to generate electricity.
(a) What do all these energy sources have in common?
A They are available at any time of the day or night.
B They are non-renewable energy sources.
C They do not affect wildlife.
D They do not cause any sort of pollution.
(b) Which of these energy sources is most appropriate to generate electricity to run a well in a remote African village?
A falling water B solar energy
C tides D waves
(c) Which of these energy sources is most likely to produce noise pollution when used to generate electricity?
A solar energy B tides
C waves D wind energy
(d) Which of these energy sources is least likely to be associated with damaging wildlife or the habitat of wildlife when used to generate electricity?
A falling water B tides
C waves D wind energy |
A.)D B.)B C.)D D.) D
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What does start-up time mean? |
Time taken from “turning on” the power station until electricity is generated
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What is the national grid made up of?
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Pylons and wires, step up and step down transformers
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What is the function of step up and step down transformers? |
Reduce and increase the current
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Why are step up and step down transformers required? |
To reduce energy loss as heat
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Why are combined heat and power stations (CHP’s) more efficient than “normal” power stations? |
The use waste heat energy usefully to heat local homes/businesses
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