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23 Cards in this Set
- Front
- Back
Pure Substance |
Or simply substance, is matter that always has exactly the same |
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Element |
Is The Substance that cannot be broken down into simpler substances |
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Atom |
Is the smallest particle of an element |
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Compound |
Is a substance that is made from two or more simpler substances and can be broken down into those simpler substances. The simpler substances are either elements or other compounds. |
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Heterogeneous Mixture |
Is when the parts of the mixture are noticeably different from one another. ( "Different" and "kind" ) |
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Homogeneous Mixture |
Is when the substances are so evenly distributed that it is difficult to distinguish one substance in the mixture from another. ( "Same" and "kind" ) *Appears to be same |
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Solution |
Is when substances dissolve and form a homogeneous mixture. |
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Suspension |
Is a heterogeneous mixture that separates into layers over time. |
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Colloid |
Contains some particles that are intermediate in size between the small particles in a solution and the larger particles in a suspension. Like solutions, colloid do not separate into layers and you can not use filter to separate the parts. Colloids do scatter light like a suspension. |
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Physical Property |
Is any characteristics of a material that can be observed or measured without changing the composition of the substance in the material. |
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Viscosity |
Is the tendency of a liquid to keep from flowing - it's resistance to flowing. The greater the viscosity, the slower the liquid moves. |
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Conductivity |
Is the ability of a material to allow heat to flow. |
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Chemical Change |
Occurs when a substance reacts and forms one or more new substances. |
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Precipitate |
Is any solid that forms and Separates from a liquid mixture. |
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Malleability |
Is the ability of a solid to be hammered without shattering. |
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Melting Point |
Is the temperature at which a substance changes from solid to liquid. |
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Boiling Point |
Is the temperature at which a substance boils. |
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Hardness |
Is the ability of a material to be scratched, cut, or curved by or do the same to another material. |
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Density |
Is the ratio of the mass of a substance to its volume. |
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Physical Change |
Occurs when some of the properties of the material change, but the substance in the material remain the same. (Without change) |
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Chemical Property |
Is any ability to produce a change in the composition of the matter. |
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Flammability |
Is a materials ability to burn in the presence of oxygen. |
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Reactivity |
Is the properties that describes how readily with other substances. |