What makes the plates of the crust move?

 Continental Drift  Pangea  Mid-Ocean Ridge  Convection  Theory of plate tectonics

 Earth’s continents were once joined in a single landmass and gradually moved, or drifted apart.  Alfred Wegener first proposed the theory of continental drift.

 Fossils: Discoveries of organisms on different continents suggest they were once together.  Climate: Fossils such as, tropical plants, are found on continents that are not tropical.  Geology: Finding of rocks found on other continents shows that the continents were once together

 What is the theory of Continental Drift?  What was the scientist name that came up with the theory of Continental Drift?  What are the 3 evidences of continental drift?

Pangaea

 Continents had once been joined in a huge supercontinent called Pangea.  Pangea started to splitting apart about 200 million years ago.  What scientist came up with the pangea theory?  Alfred Wagner

 Underwater mountain ranges.  The mid-ocean ridge is the longest chain of mountains.  Hess proposed that the ocean floors move, carrying the continents along with them. The movement begins at the mid-ocean ridge.

 Energy transfer by the movement of a material.  Example: Boling water, the water at the bottom of the pot heats up, becoming less dense, and rises. At the surface, it cools, becomes denser, and sinks, only to be heated and rise again.

 PG. 14 IN SCIENCE BOOK