Mod+2+-+Jess+L

EARTH DEFFS

Divergent plates-magma rises and pushes plates apart

convergent plates- a plate collides or dives under another

transform-2 plates grind against each other

lithosphere-plates that make up the Earths outer shell

divergent boundaries- where new crust is generated as the plates pull away from each other

convergent boundaries- where crust is destroyed as one plate dives under each other

transform boundaries where crust is neither produced or destroyed as the plates slide horizontally past each other

plate boundary zone- broad belts in which boundaries are not well defined and the effects of plate interaction are unclear

NORTH AMERICAN PLATE

North American plate is 2/3 land mass of both United States and Canada

African Plate

African plate is about 1/2 land mass with a divergent plate boundaries on the west edge running up the red sea



"plate tectonics." // www.nationalgeographic.com //. Seth Stein, Northwestern University; USGS Earthquake Hazard Program; Global Volcanism Program, Smithsonian Institution, Web. 11 Nov. 2009. .