| A | B |
| Atom | small particle that is a building block of matter |
| Compound | substance containing atoms of two or more different elements chemically bonded together |
| Dissolve | to form a solution by mixing evenly |
| Element | substance that consists of just one type of atom |
| Heterogeneous Mixture | type of mixture in which the individual substances are not evenly mixed |
| Homogeneous Mixture | type of mixture in which the individual substances are evenly mixed |
| Matter | anything that has mass and takes up space |
| Mixture | matter that can vary in composition |
| Substances | matter with a composition that is always the same |
| Unique | having nothing else like it |
| Bond | force between atoms or groups of atoms |
| Density | mass per unit volume of a substance |
| Mass | amount of matter in an object |
| Physical Property | characteristic of matter that you can observe or measure without changing the identity of the matter |
| Property | characteristic used to describe something |
| Solubility | ability of one substance to dissolve in another |
| Physical Change | change in size, shape, form, or state of matter in which the matter’s identity stays the same |
| Chemical Change | change in matter in which the substances that make up the matter change into other substances with new physical and chemical properties |
| Chemical Property | characteristic of matter that can be observed as it changes to a different type of matter |
| Concentration | amount of substance in a certain volume |