TLW identify convergent divergent and transform plate boundaries

TLW identify convergent, divergent, and transform plate boundaries For the purpose of understanding the different landforms formed by these plate boundaries As measured by naming the three types of plate boundaries correctly

Plate Tectonics Why do we have earthquakes?

Is the earth’s crust solid? • No, the earth’s crust is broken into many plates.

Do the plates move? • At one time, there was only one continent called Pangaea. • Yes, the plates move slowly over time.

Why do they move? Heat from the inner earth creates convection currents that move the magma.

Driving Forces of Plate Tectonics

Divergent Boundary Two Tectonic Plates That Separate

Divergent Boundary Sea-floor spreading Magma rises up and new crust is formed

Divergent Boundary Mid-Atlantic Ridge Indian Ridge

Divergent Boundary

Divergent Boundary Iceland Rift Valley

Divergent Boundary Rift Valley in Africa

The East African Rift Valley is land that has sunken by divergent boundary (Land Subsidence = sinking land)

Transform Boundary Two tectonic plates slide past each other.

Transform Boundary

Transform Boundary

Convergent Boundaries Two tectonic plates collide.

Ocean-Continent Convergent Boundary Rising magma forms new crust in the form of mountains and volcanoes Sea Trench rge e nv ate o c r pl n s n w e e i o t o i v d t ea Melting of la. H d c p e u z o eeold crust b wd u u T q S s

Andes Mountains Visualizing Physical Geography Copyright © 2008 John Wiley and Sons Publishers Inc.

Ocean-Ocean Convergent Boundary Aleutian Trench Old crust is melted and recycled.

Aleutian Islands 21

Continent-Continent Convergent Boundary No new crust is formed or created

TLW identify convergent, divergent, and transform plate boundaries For the purpose of understanding the different landforms formed by these plate boundaries As measured by naming the three types of plate boundaries correctly