click below
click below
Normal Size Small Size show me how
Unit 1.2
Science
Term | Definition |
---|---|
Atoms | are the smallest unit of an element that maintains the properties of that element. |
Pure Substances | is a substance that has definite physical and chemical properties such as appearance, melting point, and reactivity. |
Heterogeneous | mixture is one that does not have a uniform composition. |
Homogeneous | If you add sugar to a cup of water, the sugar dissolves. Each part of the sugar-water, mixture has the same sweet taste. |
Compound | a substance made up of atoms of two or more different elements joined by chemical bonds |
Element | a substance that cannot be separated or broken down into simpler substances by chemical means |
Mixture | a substance made by mixing other substances together |
Solid | the state of matter in which the volume and shape of a substance are fixed |
Liquid | the state of matter that has a 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 a state from a gas directly to a solid. |