During which period of the paleozoic era did the largest mass extinction occur

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.

As water is cooled from 4 c to 0 c its density

By locating production facilities abroad, multinational corporations must pay more for labor true or false