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Published byBruce Arnold Robinson Modified over 9 years ago
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Sci. 5 – 2 Energy Conversions Pages 124- 130
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A. Energy Conversions- a change from one form of energy to another
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B.Any form of energy can be converted into any other form of energy.
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C. Often Potential energy and kinetic energy convert back and forth like in a trampoline or a pendulum’s swing.
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D. Light energy from the sun is used in photosynthesis to make sugar and oxygen in plants and food.
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E. During photosynthesis plants convert light energy into chemical energy.
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F. Electrical energy is easily converted into other forms of energy.
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1) Hair dryer- sound, thermal, and kinetic
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2) Alarm clock- light and sound
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3) Light bulb- light and thermal
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G. Machines can transfer energy and convert energy into a more useful form.
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H. In a battery, chemical energy is converted into electrical energy.
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I.Energy Efficiency- a comparison of the amount of energy before a conversion with the amount of USEFUL energy after a conversion. J. Energy input is ALWAYS greater than energy output.
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