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Unit 1 Matter and Energy Part 2

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Term
Definition
Pure Substances   A material that is composed of only one type of particle, whether it be an atom or molecule.  
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Physical Change   A change from one state (solid, liquid, gas, or plasma) to another without a change in chemical composition.  
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Chemical Change   A process where chemical bonds are broken and new bonds are formed between different atoms.  
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Conservation of Energy   A principle stating that energy cannot be created nor destroyed, but can be altered from one form to another.  
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Conservation of Matter   A fundamental principle of classical physics that matter cannot be created or destroyed in an isolated system, but can only change form.  
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Heat Flow   The amount of heat transferred.  
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Reactivity   The tendency of a substance to undergo chemical reaction, either by itself or with other materials, and to release energy.  
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Conbustibility   A measure of how easily a substance will set on fire.  
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Precipitate   To cause (a substance) to be deposited in solid form from a solution.  
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Potential Energy   The energy of a particle or system of particles derived from position, or condition, rather than motion. (stored energy)  
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Kinetic Energy   The energy possessed by a body because of its motion, equal to one half the mass of the body times the square of its speed. (energy in motion)  
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Chemical Reaction   Interaction of two or more chemicals that produces one or more new chemical compounds, or alters the properties of the original substances.  
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Heat   The form of energy that flows between two samples of matter due to their difference in temperature.  
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Substances   A particular kind of matter with uniform properties.  
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Homogeneous   Uniform in structure or composition throughout.  
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Heterogeneous   Consisting of dissimilar elements or parts; not homogeneous.  
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Created by: lcrowe
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