read works from last week (hydroelectric power (The sun is a renewable…
read works from last week
The sun is a renewable energy.other renewable sources of energy include water, the wind, biomass fouls, geothermal energy, and hydrogen.
solar energy is the indirect source of water power. recall that in the water cycle, energy from the sun that heats water on the earth surface, forming water vapor.
wind can be used to turn a turbine and generate electricity
hydroelectric power is electricity produced by flowing water. a dam across a river blocks the flow of water, creating a body of water called a reservoir.
wood was probably the fist fuel ever used for heat and light. wood belongs to a group called biomass fuels, wich are mad from living things.
harnessing the sun's energy
the warmth you feel is the sun's soler energy
solar power plants
one way to capture the sun's energy involves giant mirrors.in solar power plants, the row of mirrors focuses the sun's rays to heat a tank of water. the water boils, creating steam, which can be used to generate electricity.
solar energy can be converted directly into electricity in solar cells.
passive solar energy
solar energy can be used to heat building with passive solar systems.
active solar heating
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tapping earth's energy
below earth's surface are pockets of hot liquid rock called magma. in same places, magma is very close to the surface.
the promise of hydrogen
it burns cleanly,it creates no smog or acid rain.