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Unit 1.2
Science
Term | Definition |
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Atom | the smallest unit of an element that maintains the properties of that element |
Element | a substance that cannot be separated or broken down into simpler substances by chemical means |
Compound | a substance made of atoms of two or more different elements joind by a chemical bond |
Mixture | a combination of two or more substances that are not chemically combined |
Pure Substance | a sample of matter, either a single element or a single compound, that has definite chemical or physical properties |
Heterogeneous | describes something that does not have a uniform structure or composition throughtout |
Homogeneous | describes something that has a uniform structure or composition throughtout |
Solid | the state of matter in which the volume and shape of a substance are fixed |
Liquid | the state of matter that has a definite volume but not a definite shape |
Gas | a form of matter that does not have a definite volume or shape |
Freezing | the change of state from a liquid to a solid |
Melting | the change of state from a solid to a liquid |
Evaporation | the change of state from a liquid to a gas that usually occurs at the surface of a liquid over a wide range of temperatures |
Boiling | the change of state from a liquid to a gas that occurs at a specific temperature |
Condensation | the change of state from a gas to a liquid |
Sublimation | the change of state from a solid directly to a gas |
Deposition | the change of state from a gas directly to a solid |