oil - Formed from ancient animals which gained energy from eating plants, i.e. photosynthesis, coal - Formed from ancient forests which got energy via photosynthesis, nuclear - Happens due to fission in unstable atoms, gas - Formed from ancient animals which gained energy from eating, i.e. photosynthesis, solar - Either heat or light waves, wind - Sun heats surfaces which create air currents, hydroelectric power - Solar energy causes evaporation, tidal - Caused by gravitational forces, biofuels - Photosynthesis transforms solar energy into chemical, geothermal - Caused by nuclear fission in atoms of rocks,

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