In terms of energy, how would you classify the following chemical reaction?
2cu + o2 +315 > 2cuo a. endothermic
b. exothermic
c. both endothermic and exothermic
d. neither endothermic nor exothermic

some think that theories become laws, but theories and laws have separate and distinct roles in the scientific method. a law is a description of an observed phenomenon in the natural world that hold true every time it is tested. it doesn't explain why something is true; it just states that it is true.

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where’s the list ? the question is incomplete