When mendeleev started his work on organizing the elements, about how many had
been discovered?
about 10
well over 100
about 60
the same as today

In an energy pyramid, which level has the most available 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

What type of organic molecule comprises the majority of a potato?