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thermal energy

the total energy of all of the particles in an object

chemical change

a change in matter that produces one or more new substances

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

law of conservation of mass

matter is not created or destroyed in any 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

endothermic change

a change in which energy is taken in

exothermic change

a change in which energy is released

physical

a substance that undergoes a ______ change is still the same substance after the change

examples of physical changes

dissolving, bending, crushing, breaking, chopping

chemical

a ________ change produces new substances with properties different from those of the original substances

examples of chemical changes

combustion, electrolysis, oxidation, tarnishing

energy

every chemical or physical change in matter includes a change in ________

temperature

________ is related to the amount of thermal energy an object has

thermal energy

temperature is related to the amount of ________ an object has

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