vocab PS Ch 15 Section 1
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| substance | type of matter with fixed composition
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| element | substance made from all the same type of atom
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| compound | substance in which the atoms of two or more elements are combined in a fixed proportion
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| mixture | made up of two or more substances which can be separated by physical means
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| heterogeneous mixture | different materials can be easily distinguished
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| homogeneous mixture | two or more materials blended evenly throughout
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| solution | homogeneous mixture with particles so small they can not be seen with a microscope and will not settle out
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| colloid | mixture with particles larger than those in solutions (big enough to scatter light) but will not settle out
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| suspension | mixture with particles large enough to scatter light and the particles will settle out upon standing
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| Tyndall effect | scattering of light by colloidal particles
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