Describe how electricity or other useful forms of energy may be obtained from:
–– chemical energy stored in fuel
–– water, including the energy stored in waves, in tides, and in water behind hydroelectric dams
–– geothermal resources
–– nuclear fission
–– heat and light from the Sun (solar cells and panels)
–– wind
Understand that the Sun is the source of energy for all our energy resources except geothermal, nuclear and tidal
Show an understanding that energy is released by nuclear fusion in the Sun
Give advantages and disadvantages of each method in terms of renew-ability, cost, reliability, scale and environmental impact
Show a qualitative understanding of efficiency
Recall and use the equations: efficiency = useful energy output/energy input × 100% efficiency = useful power output/power input × 100%
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