Question

Do gases, liquides or solides contract the most when they are cold and why?

Answer 1

Answer:

All states of matter expand when heated and contract when cooled. Gases expand most when heated and solids the least because gas particles are already far apart and are much freer to move.

Explanation:

Molecules within gases are further apart and weakly attracted to each other. Heat causes the molecules to move faster, (heat energy is converted to kinetic energy ) which means that the volume of a gas increases more than the volume of a solid or liquid.

Answer 2

Answer:

As well, gases have no fixed shape or size. (Remember that they always take the shape and size of their container.) If you put gases in a flexible container such as a balloon, however, you can see that they expand and contract much more than solids when the temperature changes.