Question

Metal expand on heating and contract on​

Answer 1

Answer:

melting

Explanation:

this is your answer hope it helps you

Answer 2

Answer:

The expansion (or contraction) of any material is due to the kinetic energy of its atoms. When a material is heated, the increase in energy causes the atoms and molecules to move more and to take up more space— that is, to expand. This is true of even a solid such as a metal.