UNIT 9: ENERGY AND THE ENVIRONMENT
Main vocabulary:
-Energy source: everything in nature that can be used to produce energy.
-Energy: something has energy if it can make something move or change position.
-Environment: everything in the world around us.
-Fossil fuels: coal, petroleum and natural gas.
-Non-renewable energy: energy that will run out one day (like coal).
-Renewable energy: energy that will never run out (like wind).
-Forms of energy: light, electrical, mechanical, chemical and thermal.
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