| A | B |
|---|
| energy | the capacity to do work |
| physical change | a change of matter from one form to another without a change in chemical properties |
| chemical change | a change that occurs when one or more substances change into entirely new substances with different properties |
| evaporation | the change of a substance from a liquid to a gas |
| endothermic | describes a process in which heat is absorbed from the environment |
| exothermic | describes a process in which a system releases heat into the environment |
| law of conservation of energy | the law states that energy cannot be created or destroyed but can be changed from one form to another |
| heat | the energy transferred between objects that are at different temperatures |
| temperature | a measure of how hot (or cold) something is; specifically a measure of the average kinetic energy of the particles in an object |
| scientific method | a series of steps followed to solve problems |
| hypothesis | a theory or explanation that is based on observations and that can be tested |
| theory | an explanation for some phenomenon that is based on observations, experiments, and reasoning--tells why things work |
| law | a summary of many experimental results and observations- tells how things work |
| accuracy | how close a measurement is to the true value of the quantity measured |
| precision | the exactness of a measurement |
| significant figure | a prescribed decimal place that determines the amount of rounding off to be done based on the precision of the measurement |
