What is one reason matter is able to move around within the earth

One of the reason that matter is able to move around within the earth is THE INTERACTION BETWEEN MATTER AND ENERGY.
The major source of energy on the earth is the sun. The heat energy from the sun is used to drive many chemical reactions on the earth. When the heat energy of the sun heat up a matter, it increases its temperature and causes the particles in the matter to move with greater motion until phase change occur. For instance, when the sun heat up water in the ocean, the particles of the water move about with great energy until they escape into the atmosphere in form of vapour.