What is the main source of energy that drives the cycling of matte in the geosphere?

A. The sun

B. Heat from Earths’s interior

C. Tectonic plates colliding

D. Volcanoes

It is a mixture. simply put, a compound must be pure, that is, of only one chemical structure and composition. a mixture is made of different chemical substances (i.e. elements, molecules, compounds) that are not chemically bonded to each other, but instead physically grouped together, as in the case of gasoline (a homogeneous solution).