renewable resources Flashcards
renewable resources
resources that don’t run out and can be reused
Solar cells
converts solar energy directly into electrical energy
solar energy is not available all the time
hydroelectricity
generated by falling water in places where water can be trapped in high reservoirs
wind turbines
generates electricity when wind is the correct speed
tidal power
generate electricity when turbines in huge dams across a river turn as the tide flows in and out
Bio-fuels
made from animal or plant waste
carbon neutral
why are bio-fuels carbon neutral
because when they burn they release the same amount of CO2 that the plant had absorbed from the atmosphere previously
Why can bio-fuels be considered not carbon-neutral
energy is needed to grow and harvest
how else can electricity be generated
from waves or from hot rocks underground
