| A | B |
|---|
| energy | capacity to do work or produce heat |
| kinetic energy | energy of motion |
| potential energy | energy possessed by objects because of their position |
| joule | SI unit of energy |
| law of conservation of energy | energy is neither created nor destroyed |
| calorimeter | measures movement of heat into or out of a substance |
| Kelvin | SI unit of temperature |
| absolute zero | motion of particles of matter ceases |
| matter | anything that has mass and volume |
| solid | holds a particular shape and has a definite volume |
| liquid | does not hold its own shape but does occupe a definite volume |
| gas | has no definite shape or volume |
| physical properties | characteristics of a substance that can be observed without altering the identity of the substance |
| chemical properties | characteristics of a substance that cannot be observed without altering the substance |
| physical change | change that occurs without altering the substance |
| chemical change | change that alters the substance |
| law of conservation of matter | matter is neither created nor destroyed in any process |
| element | substance that cannot be separated into simpler substances by a chemical change |
| compound | two or more elements combine in a chemical reaction |
| pure substance | has a unique set of chemical and physical properties |
| mixture | blend of two or more pure substances |
| heterogeneous | mixture that has visibly different parts |
| homogeneous | mixture that does not contain visibly different parts |
| distillation | method of separation of a mixture that takes advantage of different boiling points of substances |
| chromatography | method of separating pigments in a substance |
| crystallization | method of producing solids of a high purity |
