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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 |