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unit 7 - Coggle Diagram
unit 7
nrg we use
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nrg from the wind
the sun heats the air, and it moves, windmills use the motion to generate power
renewable, but unreliable
nrg from waves
waves are formed by friction of wind and water, so it can generate nrg
nrg from water
when water falls down, it has a lot of gpe, and it can be converted to electrical nrg
nrg from biomass
burning wood, feces, etc gives u nrg
fossil fuels
coal, gas, oil can be burned to turn into nrg
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