The coldest atmospheric layer is the user: the hottest atmosphere is the

In 1915 the german geologist and meteorologist alfred wegener first proposed the theory of continental drift, which states that parts of the earth's crust slowly drift atop a liquid core. the fossil record supports and gives credibility to the theories of continental drift and plate tectonics.

An earthquake’s epicenter can be determined from arrival time data recorded on a(

Plzz on what physical process is responsible for the creation of volcanoes, earthquakes and ocean trenches at the plate margins?