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Types of Plate Boundaries. The earth’s crust A. Is one continuous layer of rock with no breaks B. Can be classified into two types (continental & oceanic)

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Presentation on theme: "Types of Plate Boundaries. The earth’s crust A. Is one continuous layer of rock with no breaks B. Can be classified into two types (continental & oceanic)"— Presentation transcript:

1 Types of Plate Boundaries

2 The earth’s crust A. Is one continuous layer of rock with no breaks B. Can be classified into two types (continental & oceanic) C. Is split into smaller pieces called plates D. Both B and C

3 The earth’s crust A. Is one continuous rock B. Can be classified into two types (continental & oceanic) C. Is split into smaller pieces called plates D. Both B and C

4 The Earth’s plates A. Move quickly around the surface of the earth B. Sometimes run into each other C. Never move D. Never touch

5 The Earth’s plates A. Move quickly around the surface of the earth B. Sometimes run into each other C. Never move D. Never touch

6 Why do plates move? A. Magma circulating in the mantle moves them around B. Explosions from undersea volcanoes propel the plates apart C. The plates repel and attract each other because they are magnetic

7 Why do plates move? A. Magma circulating in the mantle moves them around B. Explosions from undersea volcanoes propel the plates apart C. The plates repel and attract each other because they are magnetic

8 Mantle Convection Differences in temperature cause material to circulate

9 Plates are Pushed & Pulled

10 Draw this plate boundary

11 What type of plate boundary is this? A. Convergent Plate Boundary B. Divergent Plate Boundary C. Transform Plate Boundary D. Bivergent Plate Boundary

12 What type of plate boundary is this? A. Convergent Plate Boundary B. Divergent Plate Boundary C. Transform Plate Boundary D. Bivergent Plate Boundary

13 What happens at a divergent boundary? A. Two plates move together B. Two plates move past each other C. Two plates move apart D. nothing

14 What happens at a divergent boundary? A. Two plates move together B. Two plates move past each other C. Two plates move apart D. nothing

15 Divergent Plate Boundary Starts on land as a rift valley Ends up as a mid-ocean ridge (after millions of years)

16 Divergent Boundary Formation

17

18

19 Divergent Boundaries Locations: Mid-Atlantic Ridge (Middle of Atlantic Ocean) East African Rift Zone

20 What type of plate boundary is this?

21 A. Convergent Plate Boundary B. Divergent Plate Boundary C. Transform Plate Boundary D. Bivergent Plate Boundary

22 What type of plate boundary is this? A. Convergent Plate Boundary B. Divergent Plate Boundary C. Transform Plate Boundary D. Bivergent Plate Boundary

23 What happens at a convergent boundary? A. Two plates move together B. Two plates move past each other C. Two plates move apart D. nothing

24 What happens at a convergent boundary? A. Two plates move together B. Two plates move past each other C. Two plates move apart D. nothing

25 How many types of convergent boundaries are there? A. 1 B. 2 C. 3 D. 4

26 How many types of convergent boundaries are there? A. 1 B. 2 C. 3 D. 4

27 Converging Oceanic/Continental An oceanic plate and a continental plate meet The denser oceanic plate sinks underneath the continental plate Called subduction Produces volcanoes on the continental plate

28 Draw this Oceanic/ Continental Convergent Boundary

29 Converging Oceanic/Continental Locations –Washington and Oregon (Cascade Mountains) –Andes Mountains (South America)

30 Converging Oceanic/Oceanic Two oceanic plates meet The oceanic plate with older crust is colder so it is –A. Less Dense –B. Denser –C. Thicker –D. Hotter

31 Converging Oceanic/Oceanic Two oceanic plates meet The oceanic plate with older crust is colder so it is –A. Less Dense –B. Denser –C. Thicker –D. hotter

32 Converging Oceanic/Oceanic It subducts underneath the less dense plate Volcanoes form on the upper plate

33 Converging Oceanic/Oceanic Locations: –Japan –The Philippines

34 Converging Continent/Continent Two continental plates with the same density meet True or False: –Subduction can occur? FALSE! –Volcanoes can form? FALSE! –Mountains form? TRUE!

35 Converging Continent/Continent

36 Locations: –Himalayas (between India and China)

37 India Collides with Asia

38 Draw this plate boundary

39 What type of plate boundary is this? A. Convergent Plate Boundary B. Divergent Plate Boundary C. Transform Plate Boundary D. Bivergent Plate Boundary

40 What type of plate boundary is this? A. Convergent Plate Boundary B. Divergent Plate Boundary C. Transform Plate Boundary D. Bivergent Plate Boundary

41 What happens at a TRANSFORM boundary? A. Two plates move together B. Two plates move past each other C. Two plates move apart D. nothing

42 What happens at a TRANSFORM boundary? A. Two plates move together B. Two plates move past each other C. Two plates move apart D. nothing

43 Transform Boundary Locations: –California (San Andreas Fault)

44 Hot Spots Occur in the middle of plates (not a plate boundary) Very hot area of mantle (Mantle plume) melts through the crust Stationary (never move) As plate moves, mantle plume will melt several holes in the crust, forming a chain of volcanoes

45 Hot Spots Which of these chains of volcanoes is caused by a hot spot? –A. Japan –B. Hawaii –C. The Andes in South America –D. The Cascades in North America

46 Hot Spots Which of these chains of volcanoes is caused by a hot spot? –A. Japan –B. Hawaii –C. The Andes in South America –D. The Cascades in North America The rest are convergent boundaries

47 Hot Spots

48 Seamounts and Plate Movement

49 Hot Spot Locations HawaiiWyoming (Yellowstone National Park)


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