<span>Not all solids melt when they are heated. Some may undergo chemical changes as a result of heating. For example paper burns rather than melts</span>
It oxidized cu since it gains electons.
A population is all the organisms of a single species in a given area
<span>C. Cooking rice because it needs heat to be cooked. D. A chemical cold pack it's obvious if it generates cold then it needs heat
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