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| a flow of electricity through a wire |
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| a form of energy that can be converted to other forms of energy, such as heat, light, and sound |
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| a form of energy; example: machines work when converted by heat to motion (train) |
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| a material that contains energy (stored) |
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| a place where energy comes from, such as batteries, food, fuels, and the Sun |
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| a regular, repeating pattern; ocean and sound waves |
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| a source of stored chemical energy |
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| an object that is changing position; how energy is carried from one place to another |
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| energy STORED in a substance |
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| energy source that keeps things alive (stored energy) |
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| energy that is stored (as chemicals) until it is needed |
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fast back-and-forth movement;
when objects vibrate they produce sound |
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| most of the energy we use comes in two forms: light, heat; most important: light |
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| move from one place to another |
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| the ability to make things happen! energy can take a number of forms and can be converted from one form to another |
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| the preserved remains of plants that lived long ago and changed into oil, coal, and natural gas (stored energy) |
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