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Energy Vocabulary

Across
To preserve energy.
Energy made by heat inside the Earth's crust
Radiant energy emmited by the sun
Organic matter used as a fuel, especially in a power station for the generation of electricity
Resource of economic value that can't be readily replaces by natural means on a level equal to its consumption.
Down
Substance of economic value that can be replaced or replenished in the same amount or less as it takes to draw the supply down.
Energy derived from the movement of water
Natural fuels such as coal or gas, formed in the geological past from the remains of living organisms.
Electrical energy obtained from harnessing wind power
Energy released during nuclear fission or fusion especially when used to generate electricity
Property of objects which can be transferred to other objects or converted into different forms