Question

why does a solid expand when it is heated​

Answer 1

Answer:

When a solid is heated, its atoms vibrate faster about their fixed points. The relative increase in the size of solids when heated is therefore small. ... Liquids expand for the same reason, but because the bonds between separate molecules are usually less tight they expand more than solids.

Explanation:

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Answer 2

Answer:

expands

Explanation:

as when its atoms in the molecules get heated so what happens is that the molecules try to expand and move freely as the heat makes them move so when on heating they will not have space so they will expand