Plate Tectonics WS

Eric Angat

Alfred Wegener proposed the Continental drift theory. He stated that continents were moving but could he not explain what makes them move. No one believed him.

Lauresia

GondwanalandPangaea

1. Who is Alfred Wegener?

Lauresia

Gondwanaland

Pangaea

Jurassic Cretaceous

Present day

2. What happened to the supercontinent Pangaea?

Seven continents

Lauresia became North America, Europe, and Asia

3. How did Alfred Wegener use FOSSILS to explain the Continental Drift theory?

Fossil A

Fossil A

Fossil B

Fossil BFossil B

Fossil B

http://wiki.answers.com/Q/What_are_the_continents_that_made_up_laurasia#slide=2

How did the animals cross lands if the lands were not connected?

4. How did Alfred Wegener use the CONTINENTS to explain the Continental Drift theory?

The continents fit together like a puzzle.

Climate in this region was similar.

5. How did Alfred Wegener use ROCKS to explain the Continental Drift theory?

The Appalachian mountains to the shores were used

to be part of Africa. And the rocks matched!

United States

AfricaAfrica

Appalachian Mountain

6. What causes the continents to move?

Continents move because of the convection current in the mantle.

Earth’s core

convection

These circular currents in the asthenosphere are called convection currents. Hot magma goes up and cooler magma goes down.

7. What is convection current?

8. What are the different types of plate boundaries?

• Rift valley in Africa• Sea floor spreading in

the Atlantic ocean• Volcanic activities

Trench, mountain ranges, volcanic activities, subduction zones

San Andreas fault, no volcanic activity

Horizontal Shear

divergent

convergent

Transform

This image shows San Andreas Lake and Crystal Springs reservoir from the air, looking SouthEast from HERE. The highway paralleling the lakes to the left is Interstate 280, ``the most beautiful urban highway in the United States''. (And it is indeed very scenic.)

Transform or Shear boundary

9. What type of boundary is the San Andreas fault?

10. Convergent - Oceanic-continental boundary forms_________________.

trenchvolcanoes

subduction

11. Convergent – Continental -continental boundary forms_________________.

Mountain range

subduction

Convergent Boundary

12. Convergent - Oceanic-oceanic boundary forms_________________.

subduction

trenchvolcanoes

Splitting Africa

Widening Atlantic Ocean

13. How is Earth affected by divergent boundaries?

Young Crust is nearer to the ridge.

Old Crust is farther from the ridge.

Rift Valley is a divergent boundary

14. What kind of boundary is a rift valley?

Most EARTHQUAKES happen anywhere around the Pacific Ring of Fire!

15. Where do most earthquakes happen?

16.What type of landform is created when two continental plates collide?

A.volcanoB.folded mountainC.trenchD.mid-ocean ridge

17. Which landform is not formed from a convergent boundary?

A.volcanoB.folded mountainC.trenchD.mid-ocean ridge

18. The mid-ocean ridge in the Atlantic ocean is what type of plate boundary?

A.convergentB.DivergentC.horizontal shearD.transform

19. When earthquakes happen, what is the location directly above the focus?

A.EpicenterB.fault

Ridge push

Rocks are melted and recycled into new rocks.

convection

Ridge push

Rocks are melted and recycled into new rocks.

Ridge

20. Lithospheric ridge push causes plates to undergo___.

A.Subduction and recycled into new rocks.

B.Division of plates.

21. What type of plate boundary causes the earthquakes in California?

A.Transform boundary or shear stressB. divergent boundary or rift

valley.

Matching type: What type of plate boundary is responsible for the following landforms.• convergent boundary • divergent boundary • Transform or Sliding boundary

 _______22. Island arc _______23. Volcanic mountain range_______24. Marianas trench _______25. Mountain range_______26. Mid ocean ridge_______27. San Andreas fault

convergent

convergent

convergent

convergent

divergent

transform