| A | B |
|---|
| substance | element or compound that cannot be broken down into simpler components and maintain the properties of the original substance |
| element | substance with atoms that are all alike |
| compound | substance formed from two or more elements in which the exact combination and proportion of elements is always the same |
| heterogeneous mixture | mixture, such as mixed nuts or a dry soup mix, in which different materials are unevenly distributed and are easily identified |
| homogeneous mixture | solid, liquid, or gas that contains two or more substances blended evenly throughout |
| solution | homogeneous mixture that remains constantly and uniformly mixed and has particles that are so small they cannot be seen with a microscope |
| colloid | heterogeneous mixture whose particles never settle |
| Tyndall effect | scattering of a light beam as it passes through a colloid |
| suspension | heterogeneous mixture containing a liquid in which visible particles settle |
| physical property | any characteristic of a material, such as size or shape, that you can observe or attempt to observe without changing the identity of the material |
| physical change | any change in size, shape, or state of matter in which the identity of the substance remains the same |
| distillation | process that can separate two substances in a mixture by evaporating a liquid and recondensing its vapor |
| chemical property | any characteristic of a substance, such as flammability, that indicates whether it can undergo a certain chemical change |
| chemical change | change of one substance into a new substance |
| law of conservation of mass | states that the mass of all substances present before a chemical change equals the mass of all the substances remaining after the change |
