| A | B |
|---|
| Liquid, Solid and Gas | States of matter |
| Element | Material made up of only one kind of matter. |
| Chemical Symbol | One or two letters that stand for the name of an element. |
| Compound | Matter made up of two or more elements that are joined together. |
| Substances | Category of all elements and compounds. |
| Chemical Formula | Letters and numbers that show the kind and number of each element in a compound. |
| Gas | Matter that has no definite shape or volume. |
| Liquid | Matter that has a definite volume but no definite shape. |
| Solid | Matter that has a definite shape and a definite volume. |
| Atom | The smallest part of an element that has the properties of that element. |
| Energy | Ability to cause change |
| Heat energy | Causes the changes in the states of matter |
| Evaporation | Change of state from a liquid to a gas. |
| Melting | Change of state from a solid to a liquid. |
| Boiling | Rapid change of state from a liquid to a gas. |
| Condensation | Change of stater from a gas to a liquid. |
| Freezing | Change of state from a liquid to a solid. |
