1. Bellwork Clear everything off your desk except: ILL
Pen or Pencil (P/P)
Flip to the Vocabulary/Notes Section
Label the next entry as “Continental Drift”
Wait Patiently & Quietly (P&Q)

2. Continental Drift Vocabulary

3. Continental Drift
Alfred Wegener’s hypothesis that the continents were once joined together and have broken or drifted apart
Evidence:
Fossils
Climate
Geology

4. Pangaea
The supercontinent hypothesized by Wegener
Means “all lands”

5. Mid-Ocean Ridges
Huge underwater mountain ranges in the middle of the oceans

6. Convection Current
When the hot, soft rock of the asthenosphere rises, cools and then sinks in a continuous motion

7. Plate Tectonics
Result of Wegener’s hypothesis that the lithosphere is made up of huge plates that move over Earth’s surface

8. Plate Boundary Place where the edges of two plates meet Three types:
Divergent
Convergent
Transform

9. Divergent Boundary Where two plates move apart
Usually found under the ocean

11. Convergent Boundary
Where two plates push together

12. Transform Boundary
Where two plates scrape past each other

20. Rift Valley Formed when two plates move apart at a divergent boundary
Molten rock rise to the surface to form new crust