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chapter 3 lesson 4
Term | Definition |
---|---|
physical change | alters the form or appearance of matter but does not turn any substance in the matter into a different substance |
chemical change | a change of matter that produces one or more new substances is a chemical change or chemical reaction |
law of conversation of mass | the fact that matter is not created or destroyed in any chemical or physical change |
temperature | the measure of how hot or cold something is |
thermal energy | the total energy of the motion of all the particles in an object |
endrothermic change | a change in which energy is obsorbed |
exothermic change | releases energy |
chemical energy | the energy stored in the chemical bonds between atoms is a form of energy |