| A | B |
|---|
| physical change | A type of change that involves the physical properties of a substance |
| chemical change | Process by which substances are changed into different substances with different properties |
| phase change | A change of the state of matter (solid, liquid, gas, plasma) |
| solid | a state of matter in which particles are tightly packed, usually in a regular pattern |
| liquid | a state of matter in which particles are loosely packed and able to slide past one another |
| gas | a state of matter in which particles are randomly organized and move about to fill their container |
| plasma | the most common state of matter in the Universe, the state of matter stars are made of |
| temperature | a measure of the average kinetic energy (heat) of a substance |
| compound | a substance consisting of atoms of two or more different elements joined by chemical bonds into a molecule. The elements cannot be separated by physical means. |
| Law of Conservation of Mass | states that matter cannot be created nor destroyed |
| mass | a measure of the amount of matter present |
| reactants | the substances that react in a chemical reaction (chemical change) |
| products | the end result of a chemical reaction (chemical change) |
| matter | anything that has mass and takes up space |
| chemical property | A property of matter that describes a substance's ability to participate in chemical reactions. A characteristic that cannot be observed without altering the substance. |
| physical property | A characteristic of a pure substance that can be observed without changing it into another substance |
| chemical reaction | A change in which one or more substances are converted into new substances. |
