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17 Cards in this Set
- Front
- Back
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Which statement about the oscillations of light waves is correct? a) They are parallel to the direction of energy transfer. b) They are perpendicular to the direction of energy transfer c) They rotate around the direction of energy transfer |
b) They are perpendicular to the direction of energy transfer. |
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Some types of waves are longitudinal. This means that the oscillations: a) Are perpendicular to the direction of of travel and energy transfer b) Are in the same direction as the direction of travel and energy transfer c) Rotate around the direction of travel and energy transfer. |
b) Are in the same direction as the direction of energy transfer |
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What is shown in the diagram? a) Reflection b) Refraction c) Diffraction |
a) Reflection |
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Name the non-renewable energy sources. |
Coal Oil Natural Gas Nuclear Fuels |
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Define the term 'non-renewable'. |
It will run out. It is not renewable. |
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Name 3 renewable energy sources. |
Wind Solar Hydroelectric Waves Tidal Geothermal Biofuels |
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Define the term 'renewable'. |
It will never run out. |
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How does a coal-powered power station work. |
1) The fossil fuel is burned. Chemical energy turned to heat (thermal) energy. 2) Heat energy heats water to produce steam 3) The steam turns a turbine, which turnsturns heat energy into kinetic energy 4)The turbines turn a generator which transfer kinetic energy to electrical energy |
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How do Nuclear power stations work? |
Nuclear fission produces the heat to make steam to drive turbines. However nuclear power stations have a difference in their boilers.//put picture |
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True or False. Nuclear Power Stations have the longest start up time out of the other power stations. |
True. |
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True or False. Natural Gas Power Stations have the longest start up time out of the other power stations. |
False |
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What are the advantages of Wind power. |
No pollution No permanent damage to the landscape Renewable source of energy Cheap to run |
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What are the disadvantages of wind power? |
Noise pollution Visual pollution Un-reliable - only works when there is wind HIgh initial costs |
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What do solar cells do? |
They generate electric currents directly from sunlight. |
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Why are solar cells best for watches and calculators. |
The device doesn't use much electricity |
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Give the advantages of solar energy/cells. |
No pollution Can provide energy in remote places. Quite reliable Once set up energy is free and running costs are low. |
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Give the disadvantages of solar energy/cells. |
Won't work at night Initial costs are high Not practical to connect them to the national grid |
