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Across 3. Renewable energy does not pollute the ______ that we breath 4. An energy source that is not used up is called _____ energy 8. Type of renewable energy comes from tapping heat generated inside the Earth 10. Machine used to convert mechanical energy into electrical energy

Down 1. Hydroelectric power comes from the energy of falling _______ 2. In HEP, falling water rotates a _____ which rotates a generator. 5. Spinning windmill blazed turn a turbine to create ________ 6. Type of renewable energy comes from burning plants such as wood and wood waste, agricultural waste and residue. 7. The mixture of gases produced by the breakdown of organic matter in the absence of oxygen. 9. The source of solar power.