Presentation on theme: "+ Plate Tectonics. + Aim & Learning Target Aim: How can we describe what causes the movement of the plates? Learning Target: I can describe what causes."— Presentation transcript:
2.Continental Examples: Great Rift Valley, Africa
B. Convergent Plate Boundaries – Where 2 plates come together or collide. 1.Oceanic-Continental – Subduction Zone Example: Nazca (oceanic) subducts under South American (continental)
2.Oceanic – Oceanic: Trenches Example: Trenches and island arcs of Japan and Alleutian Islands (Alaska)
3. Continental – Continental – Example: Indian/Australian Plate Colliding with Eurasian Plate forming the Himalaya Mountains
+ C. Transform Plate Boundaries – 2 plates that “slip” past one another. Ex: San Andreas Fault
+ Pulse check What type of plate boundary is found between the indian australian plate and the antarctic plate? Divergent
+ Pulse check What causes the Mid Atlantic Ridge? Divergent plate boundcary between South American and African Plate.
+ What’s the driving force beneath plate tectonics?
Convection Currents Hot, LESS dense material from deep within Earth’s mantle rises. When this material cools near the surface, it becomes MORE dense and sinks. The resulting convective flow of this material in the mantle CARRIES/MOVES lithospheric plates across the surface of Earth.
+ Pulse check What else moves in these convection currents? Water & Air