Which isotope has a relatively short half-life?

carbon-12

carbon-14

uranium-238

oxygen-16

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

Which fact represents evidence for the big bang theory?

Which of the following are correct values for the ideal gas laws constant r