Question

When most of the solids, liquids, and gases are cooled, they______.

Answer 1

1. The ascending order of kinetic energy of the molecule of the state of matter is like least in solid, intermediate in liquid, and highest in a gaseous state.
2. As the matter gets cooled, the kinetic energy of the molecules decreases.
3. As a result, the molecular distance decreases, and molecules come closer.
4. Hence, the matter gets a contract on cooling.

So, when most of the solids, liquids, and gases are cooled, they contract.