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24 Cards in this Set
- Front
- Back
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Pure Substances
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matter that always has exactly the same composition
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Element
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substance that cannot be broken down into simpler substances
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Atom
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smallest particle of an element
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Compound
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substance that is made from two or more simpler substances and can be broken down into those simpler substances
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Heterogeneous Mixture
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the parts of the mixture are noticeably different from one another
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Homogeneous Mixture
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the substances are so evenly distributed that it is difficult to distinguish one substance in the mixture from another
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Solution
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when substances dissolve and form a homogeneous mixture
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Suspension
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heterogeneous mixture that separates into layers over time
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Colloid
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contains some particles that are intermediate in size between the small particles in a solution and the larger particles in a suspension
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Physical Property
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any characteristic of a material that can be observed and measured without changing the composition of the substances in the material
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Viscosity
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the tendency of a liquid to keep from flowing
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Conductivity
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material's ability to allow heat to flow
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Malleability
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ability of a solid to be hammered without shattering
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Ductility
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ability to be drawn into a wire
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Melting Point
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the temperature at which a solid changes to a liquid
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Boiling Point
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the temperature at which a substance boils
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Filtration
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process that separates materials based on the size of their particles
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Distillation
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process that separates the substances in a solution based on their boiling points.
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Physical Change
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occurs when some of the properties of a material change, but the substances in the material remain the same.
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Chemical Property
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any ability to produce a change in the composition of matter
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Flammability
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material's ability to burn in the presence of oxygen
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Reactivity
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property that describes how readily a substance combines chemically with other substances
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Chemical Change
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occurs when a substance reacts and forms one or more new substances
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Precipitate
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any solid that forms and separates from a liquid mixture
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