| A | B |
| Atom | The smallest part of an element that still has the properties of that element. |
| Boiling | The rapid change of state from a liquid to a gas. |
| Chemical Change | A change that creates a different kind of matter. |
| Chemical Formula | A group of symbols that shows the kind and number of each element in a compound. |
| Chemical Property | A characteristic of a substance that can only be seen when the substance changes and a new substance is formed. |
| Chemical Reaction | The process in which substances are changed into another substances. |
| Compound | Matter made up of two or more elements. |
| Condensation | The change from a gas to a liquid. |
| Element | Matter made up of only one kind of atom. |
| Evaporate | To change from a liquid to a gas. |
| Freezing | The change from a liquid to a solid. |
| Gas | The state of matter that has no definite shape of volume. |
| Liquid | The state of matter that has no definite shape but a definite volume. |
| Matter | Anything that has mass and takes up space. |
| Melting | The change of state from a solid to a liquid. |
| Mixture | Matter that is made up of two or more substance that can be separated by physical means. |
| Physical Change | A change in the size, shape or state of matter in which no new matter is formed. |
| Physical Property | A characteristic of a material or object that can be seen or measured without changing the material into a new substance. |
| Property | A characteristic that describes matter. |
| States of Matter | Any of the three forms that matter may ordinarily take: solid, liquid and gas. |
| Volume | The amount of space that matter takes up. |