2. Daily Review #4 9. Put in order of age: Gondwana, Pangaea, South America 10. Sketch the layers of the Earth and label the asthenosphere, lithosphere, outer core, inner core, mantle and crust 11. Describe the 4 different pieces of evidence to support continental drift 12. How does convection cause a plate to move? 13. Look at the west coast of North America on your plate tectonics map. What do you think it will look like in 5 million years? Why? End 2 minutes End

3. Plate Tectonics Movement ◦ cm/yr ◦ Measured by GPS Interact at boundaries – 3 types ◦ Collide ◦ Separate ◦ Slide past Earthquakes can occur at all

4. Convergent Boundary Plates collide Continental- continental ◦ Create mountains ◦ Examples Examples http://indiandefence.com/threads/atlantis-was-indus-valley-plateu.45878/

5. Convergent Boundaries Subduction Zone and Trench Occurs at ◦ Oceanic-oceanic ◦ Oceanic-continental Subduction ◦ More dense plate sinks  Oceanic  Older plate ◦ Creates a trenchtrench Melts to produce magma ◦ Plate recycled Some magma rises to form volcano

6. Explosive Volcanoes Common near convergent boundaries Rare Destructive Produce clouds of ◦ Debris ◦ Ash ◦ Gas Examples ◦ NW U.S. NW U.S. ◦ Pompeii Pompeii ◦ Krakatoa Krakatoa

8. Pyroclastic Flows Explosive eruption Produced in small amounts of time, large amounts of material Lahar Faster than a hurricane Temperatures greater than 700 deg. Celsius Deadly