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Energy Transformations
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What is the Law of Conservation of Energy?
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Law of Conservation of Energy
Energy cannot be created or destroyed. It may be transformed from one form into another, but the total amount of energy never changes.
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What type of Energy Transformation is happening in the following pictures?
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Potential to Kinetic as the water from behind the dam falls over the dam.
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Potential to Kinetic as the rubber band is stretched, and then released.
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Potential to Kinetic as the book falls off of the shelf.
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Kinetic to Potential as someone lifts the book and then places it on the shelf.
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Kinetic to Potential as the ball stops due to friction
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Mechanical energy transformations may involve other kinds of energy!
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What happens when the books hit the floor?
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We also get HEAT and SOUND energy!
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We can get ELECTRICAL Energy if the water flowing over a dam powers a generator.
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Green plants turn SOLAR ENERGY into CHEMICAL ENERGY (food).
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How do animals transform CHEMICAL ENERGY into MECHANICAL ENERGY?
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They transfer CHEMICAL ENERGY from their food into MECHANICAL ENERGY, so that they are able to move.
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Carbon-based fuels come from the bodies of plants or animals.
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CHEMICAL ENERGY can be transformed into HEAT ENERGY when the fuels are burned.
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HEAT ENERGY from fuels can be transformed to ELECTRICAL ENERGY at a power plant.
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In an electric circuit, the ELECTRICAL ENERGY can be transformed into many different types of energy such as mechanical, sound, light, and heat.
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