Millions of years ago the Earth looked much different than it looks today.

All seven continents (North America, South America, Asia, Africa, Europe, Australia and Antarctica) were one gigantic continent which scientists call Pangaea. Continental drift, the process by which the continents broke apart and spread out across the Earth into the positions we know today, is caused by the movements of the pates. Which layer of Earth is broken up into these giant moving plates?

Asthenosphere

Lithosphere

Inner Core

Mantle

Mantle