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chapter3 lesson4
science vocabulary
| Term | Definition |
|---|---|
| physical change | it alters the form or appearance of matter but does not change it into something else |
| chemical change | it creates 1 or more new substances |
| law of conservation of mass | the fact that matter is neither created or destroyed in any chemical or physical change |
| temperature | how hot or cold something is |
| thermal energy | the total energy of the motion of all of the particles in an object |
| endothermic change | energy is absored |
| exothermic change | energy is released |
| chemical energy | the energy stored in chemical bonds |