| A | B |
| matter | Anything that takes up space and has mass. |
| volume | The amount of space an object takes up. |
| mass | The measure of how much matter an object contains. |
| property | something about an object that can be observed such as size, shape, color, or sound. |
| states of matter | Solid, liquid, gas, and plasma. |
| atom | A small particle that makes up matter. |
| A solid | keeps a certain shape because it's particles (atoms) stay close together. |
| Particles in liquids | are farther apart. |
| Liquids change shape | because the particles can move around each other. |
| Gas | takes the shape of the container. |
| The particles in gases | are far apart and move around freely. |
| Physical Change | a change in size, shape, state or appearance of matter. |
| Evaporate | To change from liquid state to gas. |
| Water vapor | Water in the form of gas. |
| Condense | To change from a gas to a liquid state. |
| Chemical change | a change that causes matter to become a new kind of matter. |