| A | B |
|---|
| Volume | The amount of space an object takes up. |
| Atom | The smallest particle that is still matter. |
| Molecule | Two or more atoms joined together. |
| Nucleus | The center of an atom that contains protons and neutrons. |
| Element | Matter made up of only one kind of matter. |
| Periodic Table | A chart that scientists use to organize the elements. |
| Matter | Anything that has mass and takes up space. |
| Physical Change | When the form of a substance changes but the substance still has the same chemical makeup. |
| Density | The measure of how closely packed an object's atoms are. |
| Mixture | A combination of two or more different substances. |
| Solution | A mixture in which all the parts are mixed evenly. |
| Combustibility | A measure of how easily a substance will burn. |
| Reactivity | The ability of a substance to go through a chemical change. |
