Thermal Energy Unit

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Atom

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Smallest particle of matter.

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Element

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A pure substance made of only one kind of atom.

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Compound

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A substance formed by the chemical combination of more than one element.

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Mixture

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A combination of two or more substances that are physically mixed (no new properties).

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Mass

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The amount of matter in an object.

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Solid

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A form of matter that has a definite shape and volume.

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Liquid

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A state of matter that has no definite shape but has a definite volume.

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Gas

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A state of matter with no definite shape or volume.

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Energy Transfer

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Movement of the same energy from one place or object to another.

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Conservation of Energy

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Energy cannot be created or destroyed.