What is Energy?
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What is Energy?
Different Kinds of Energy
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What is Energy?
•The ability to make things move
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Can you make things move?
•Then you have energy…
•…but there are seven different kinds of energy…
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Chemical Energy
•What holds atoms in molecules together
•Can be released by chemical reactions like burning wood
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Electrical Energy
•The movement of electrons through matter
•Electricity is a form of electrical energy
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Heat Energy
•The random motion, or vibration, of atoms in matter
•The faster the atoms vibrate the more heat energy they have
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Light Energy
•The energy carried by light
•Yes, whenever you are looking at light, you are looking at energy
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Mechanical Energy
•The energy of moving things
•When you ride a bike you use mechanical energy
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Nuclear Energy
•Holds protons and neutrons together in an atom’s nucleus
•Powers the sun and nuclear power plants
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Sound Energy
•Vibrates air molecules•The air molecules move tiny bones in your ear
•The message of sound then moves to your brain
•Can also vibrate objects
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Energy can be changed from one form to another
•Chemical energy in gasoline is changed to heat energy and then to mechanical energy in a car
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