Light/heat energy: , , The sun is Earth's main source of light and heat, Light bulbs are made-made objects that help us see , Heat keeps us warm , Chemical energy: Energy stored in food , Has chemical reactions, Chemicals stored in atoms and molecules , Burning of fossil fuels , Batteries store chemical energy, Mechanical energy: Both potential and kinetic, Stored energy in motion that does work , Hammering , Applies force to another object, applying force to cut something,

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