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14 Cards in this Set
- Front
- Back
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element
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substance that can not be decomposed into 2 or more other substances by means of chemimcal change
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matter
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anything that takes up space
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substance
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any particular variety of matter that always has the same properties and compostion regardless of how and where a sample of it is obtained
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compounds
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substances that can be decomposed into other substances by a chemical change
a compound must contain of 2 or more different elements chemically combined in definite proportinons by mass |
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mixtures
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are not substances but are composed of 2 or more substances. they have a variable composition
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physical properties
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characteristics of a substance that can change with out the substance becoming a different substance
(boiling point, color, dnsity, melting point, odor phase, tampereature, volume) |
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physical change
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change in the form of a substance but not in its chemical nature
(cutting, dissolving, dying, heating/cooling, phase changes) |
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chemical properties
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the ability of a substance to change to a different substance
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chemical change
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the change of a substance into either substances through a reorganzation of the atoms
(chemical reaction, burning, digesting, rusting, fermenting) |
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exothermic
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releases heat (hot)
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endothermic
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absorbs heat (cold)
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Temperature
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measurement of the average kinetic energy of the particle in a substance
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Heat
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the flow of energy from a object with a higher temperature to a lower temperature
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specific heat
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the amount of heat energy required to raise the temperature of one gram of a substance by one degree of Celsius
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