1. Aim: How do the plates of the Earth move?
Do Now:
Complete the reading “Plate Movement: Towards, Away and Side-by-Side” from the back top bin.
Then, answer the questions on the front and back.

2. This is what Wegener was missing with continental drift!
I. Causes of Plate Motion
Convection currents within the mantle push and pull the plates
This is what Wegener was missing with continental drift!
(ESRT p.10)

3. Why does warmer material rise?
Convection occurs when warm material rises and cool material sinks.
Why does warmer material rise?
Warmer materials rise due to their lower density.

4. II. Types of Plate Boundaries
1. Divergent boundaries form where two plates move apart (spreading).

5. • Oceanic ridges are found on either side of the rift valley created by the diverging plates.

6. • Seafloor spreading produces new oceanic crust at divergent plate boundaries

7. Which type of crust sinks under the other and why?
2. Convergent boundaries form where two plates come together.
Which type of crust sinks under the other and why?
Oceanic crust sinks since it is more dense.

8. trenches mark the subduction zones on the surface.
Subduction zones are where one plate is forced down into the mantle beneath a second plate.
trenches mark the subduction zones on the surface.
Subduction zone

9. A. Oceanic Crust vs. Continental Crust
Oceanic crust sinks beneath the continental.
• Continental Volcanoes form from the rising magma. (example: Andes Mountains)

10. B. Oceanic Crust – Oceanic Crust
One of the two plates sinks under the other.
• Volcanic Islands grow out of the ocean (example: Aleutian Islands)

11. C. Continental Crust – Continental Crust
• The two plates collide and the continents being carried are forced upward.
• Mountain ranges form from the uplift of these continents (example: Himalayan Mountains)

12. 3. Transform fault boundaries form where two plates grind/slide past
each other.
They move parallel

13. Faults and fractures
Shallow earthquakes occur
- cuts and cracks.

14. San Andreas fault, California

15. Closure 1: Boundary Type Movement (arrows and words) Features
Create and Complete the chart using your notes to help you.
Boundary Type
Movement (arrows and words)
Features
Convergent
Divergent
Transform

16. Closure 2:
Answer the following questions in your Review book using your notes and page 5 of the ESRT.
Page
#1-11
4 3

17. ESRT PAGE 5