| Term | Definition |
|---|
| matter | anything that has mass and takes up space. |
| properties | characteristics used to identify or describe a substance. |
| physical properties | characteristics of a substance that can be observed without changing the substance into something else. |
| chemical properties | characteristics of a substance that are observed when it reacts or changes to produce one or more new substances. |
| density | the relationship between mass and volume or the amount of mass in a given volume. |
| compound | a substance where two elements are chemically combined. |
| element | a substance that contains only one kind of atom. The smallest unit of matter. |
| volume | the amount of space matter takes up. |
| mass | the amount of matter in an object. |
| solid | phase of matter with a definite shape and volume. |
| liquid | phase of matter with a definite volume but not a definate shape. Spreads to fill the bottom of a container. |
| gas | phase of matter with no definate shape or volume. It fills its container. |
| energy | the abiltiy to do work or cause change. |
| plasma | an ionized gas formed when heat energy is applied to a gas. |
| chemical change | caused as the result of a chemical reaction; a new substance is produced. |
| mixture | two or more substances mixed together but not chemically combined. |
| physical change | A change that alters the form or appearance of a substance but does not make the material into another substance. |
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