Solids have a definite shape and volume true or false?

All atoms and molecules are always in motion.

The average kinetic energy of an atom or molecule in any material is proportional to the temperature. This is true whether the material is solid, liquid or gas.

Caveat:

It is sometimes said that motion ceases at absolute zero in temperature. That is almost true, but there is something called quantum zero point motion that is present even at zero temperature and that complicated the question to a level that is beyond the current discussion.