| A | B |
| Liquid | Matter with a definite volume but no definite shape |
| Neutrons | Particles with no electrical charge, found within the nucleus of an atom |
| Density | The amount of matter per unit volume |
| Protons | Particles with positive electrical charges found within the nucleus of an atom |
| Solutions | A kind of mixture in which one substance is dissolved into another |
| Chemistry | The scientific study of what substances are made of and how they can change when they combine with other substances |
| Properties | Qualities of matter such as color, shape, odor, and hardness |
| Mass | The amount of matter in something |
| Solid | Matter with a definite shape and volume |
| Physics | The scientific study of energy and how it interacts with matter |
| Electrons | Particles with negative electrical charges, surrounding the nucleus of an atom |
| Mixture | A substance that is made when two or more elements mix together but do not join chemically |
| Compound | A substance that is made when two or more elements join chemically |
| Gas | Matter without a definite shape or a definite volume |