| A | B |
|---|
| physical change | any change that alters the form or appearance of matter but does not make any substance in the matter into a different substance |
| chemical change | a change in matter that produces one or more new substances |
| law of conservation of mass | states that matter is neither created nor destroyed during a chemical or physical change |
| energy | the ability to do work or cause change |
| temperature | a measure of the average energy of random motion of particles of matter |
| thermal energy | the total energy of all the particles in an object |
| endothermic change | a change in which energy is taken in |
| exothermic change | a change that releases energy |
