Post on 19-Jan-2016
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KS4 Renewable energy
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Energy resources
Renewable SourceSun
Sun
Sun
Moon
Wind
Solar
Wave
Tidal
Hydroelectric
Biomass
Geothermal
Sun
Sun
Stored heat energy in the Earth
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Mind map
windwave
solar
hydroelectricbiomass
tidal
geothermal
nuclear
fossil fuels
Stored heat energy in the Earth
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Solar energy
Solar cells are expensive/cheap to make. Even though they only provide energy at low power / high power, sometimes they are the best solution to providing energy. Satellites in space use solar cells as a source of energy.
Solar power stations can use concave/convex mirrors to focus energy on a boiler. This produces the steam to turn a turbine, which in turn drives a generator and then produces electricity.
Solar cells contain toxic/harmless chemicals that if ‘dumped’ can poison habitats.
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Solar power
Advantages DisadvantagesUnreliable – why?
Few areas suitable
Low power energy source
Toxic chemicals in solar cells can
damage habitats
Renewable
No acid rain
No global warming
Cheap to run once built
Expensive to build
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Wind
Unlike fossil fuels and solar energy, there is no need for a b____ in a wind turbine. The wind turns the turbine d_____ - no s____ is required.
Wind energy is very l so you need many wind turbines to meet the same energy requirements as a fuel-burning power station.
You need to find an a large a___ of land, away from settlements because of the n___, and it obviously has to be w___!
oilerirectly team
ow power
reaoise
indy
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Wind power
Advantages DisadvantagesUnreliable
Few areas suitable
Low power energy source
Noisy and unsightly
Renewable
No acid rain
No global warming
Cheap to run once built
Expensive to build
Large area required
Kills migratory birds
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Wave
The S__ produces the w___ and the wind causes w____. Waves can be used to turn t_______ directly and generate electricity.
Wave energy is r________. No air pollution is produced such as sulphur dioxide or nitrogen oxides that cause acid rain. It is also cheap to run once built.
The problems are that it is expensive to set up. There are few areas suitable, it can kill flora and fauna and the energy you get is very l .
un indaves
urbines
enewable
ow power
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Tidal
The M___ causes the t____. This causes the level of the sea to rise and fall. This movement of the sea can be used to turn turbines directly and generate e________.
Tidal energy is r________ and non-polluting. It is cheap to run once built.
oon ides
lectricity
enewable
The problems are that it is to set up. There are few areas suitable, it can kill flora and fauna and the energy you get is very l . ow power
expensive
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Biomass
This is where you burn organic/inorganic matter, be it plant or animal. The reason it is classed as renewable/non-renewable is that you can reproduce this matter relatively quickly. For example, you can just grow some more plants.
However you do require a large area/small area of land.
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Geothermal
Cold water pumped
down
Warm water comes back up
and used to turn turbines
Water heated by hot rocks
Advantages?
Disadvantages?
Renewable
No acid rain or greenhouse effect
Cheap once built
Few areas suitable
Expensive to build
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Hydroelectricity
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Hydroelectricity
Advantages DisadvantagesDestroys habitats
Few areas suitable
Unsightly
Renewable
No acid rain
No global warming
Cheap to run once built Expensive to build
Large area requiredSome systems pump water back up at night with the surplus electricity – energy efficient.
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What is the energy source for tidal energy?
A. The Sun
B. A supernova
C. The Moon
D. Radioactive rocks
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What is the energy change for falling water?
A. Kinetic gravitational
B. Gravitational kinetic
C. Kinetic electrical
D. Heat Kinetic
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Which of the following is not renewable?
A. Wind
B. Biomass
C. Nuclear
D. Hydroelectric
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What is an environmental problem associated with hydroelectricity?
A. Acid rain
B. Greenhouse effect
C. Destroys habitats
D. Radioactive waste