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15 Cards in this Set
- Front
- Back
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States of matter |
Different forms of matter, in which observable properties are different (ex: gas, liquid, solid) |
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Gas |
(Vapor) has no fixed volume or shape however can conform to the shape of the container. Molecules move fast and are far apart. |
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Liquid |
Has distinct volume independent of its container, but no specific shape. Molecules move fast but are packed closely together. |
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Solid |
Has both a definite shape and volume. Molecules still move fast, however do not have much space to move freely. |
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Pure substance |
(Or just substance) matter that has distinct properties and a composition that doesn't vary from sample to sample. (Ex: water and table salt *sodium chloride*) |
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Elements |
Substances that cant be decomposed into smaller substances. Each element is composed of only one kind of atom (118 known elements) *all substances are either elements or compounds* |
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Compounds |
Are substances composed of two or more elements. They contain two or more kinds of atoms (ex: water *hydrogen and oxygen*) |
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Mixture |
Combinations of two or more substances in which each substance retains its chemical identity. |
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Homogeneous mixtures |
Mixtures that are uniform in composition. (also called a Solution *example: salt or sugar dissolved in water) |
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Heterogenous Mixture |
A mixture that does not have the same composition, properties, and appearance throughout. (Example: rocks, wood *they vary in appearance and texture*) |
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Physical properties |
Characteristics that can be observed without changing the identity and composition of the substance (example: color, odor, density, melting point, boiling point, hardness) |
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Chemical properties |
Describe the way a substance may change or react to form other substances. (Example: flammability) |
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Intensive properties |
Characteristics that do not depend on the amount of substance. (Example: temperature, melting point) |
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Extensive properties |
Characteristics that depend on the amount of the sample. (Example: mass and volume) |
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Filtration |
A form of separating mixtures |
