What happens in a chemical change that does not occur in a physical change?

How can you use chemical equations to predict the products of the reaction you can carry out?

Arollercoaster car at the top of a hill has potential energy kinetic energy chemical energy light energy

Rocks, as they are compressed, begin forming mountains above the earth's surface when two continental plates converge. the continental crust increases in depth as the mountains grow above. the himalayan mountains formed at a convergent plate boundary in this manner. the rocks are smashed together causing them to due to the intense heat and pressure from the colliding plates and eventually forming rock. a) melt; igneous b) layer; sedimentary c) recrystallize; metamorphic d) melt into the earth's interior; metamorphic