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Unit 1.2
Science
Term | Definition |
---|---|
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 up of atoms of two or more different elements joined by chemical bonds |
Mixture | A mixture contains two or more substances that are not chemically combined. |
Pure Substance | A sample of matter, either an element or a single compound, that has definite chemical and physical properties |
Heterogeneous | Describe something that does not have a uniform structure or composition throughout |
Homogeneous | Describe something that has a uniform structure or composition throughout |
Solid | A 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 gas |
Deposition | The change of state a gas directly to a solid |