When a hydrogen atom covalently bonds to another atom, how many electrons associated with this hydrogen atom become involved in such a bond?

How does a hydroelectric power plant converts energy into energy.

What is the relationship of air masses and the temperature of oceans?

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