1. Earth’s Landforms What are Earth’s landforms?

2. Lesson Essential Question How was Earth shaped and reshaped over time?

3. Landform shapes of land shapes of land Major landforms= plains, mountains, hills (came to be through forces of nature) Major landforms= plains, mountains, hills (came to be through forces of nature)

4. Plate tectonics large slow moving slabs or plates large slow moving slabs or plates

5. Continental Drift Forces within Earth caused Pangaea to break up into continental plates and drift apart Forces within Earth caused Pangaea to break up into continental plates and drift apart

6. EARTH Major Plates Major Plates

7. Big Idea What has created physical patterns on Earth’s surface?

8. Plate tectonics theory Earth’s surface is made up of slow moving slabs or plates Earth’s surface is made up of slow moving slabs or plates Continents and ocean floors form the top of these plates=move and carry continents and ocean floors with them Continents and ocean floors form the top of these plates=move and carry continents and ocean floors with them

9. Pangaea Scientists believe long ago Earth was one large supercontinent known as Pangaea Scientists believe long ago Earth was one large supercontinent known as Pangaea

10. Pangaea Scientist claim forces within Earth caused Pangaea to break into continental plates and drift apart = continental drift

11. Before and After

12. Your Turn Think-Pair-Share Which theory do you support? Why Share Out!

13. Analyze the Diagram page 21 Which of the present-day continents was at one time joined to the east side of South America?

14. Earth Outer layer= surface=crust 10-25 miles thick

15. Mantle 1800 miles below the surface 1800 miles below the surface Hot rock like materials Hot rock like materials

16. Outer Core 1400 miles thick 1400 miles thick Iron and nickel in the liquid state Iron and nickel in the liquid state

17. Inner Core iron and nickel in the solid state iron and nickel in the solid state

18. Rocky Mountains extreme heat from core causes mantle to create pressure on crust extreme heat from core causes mantle to create pressure on crust forcing crust to rise forcing crust to rise pushing large blocks of rock upward pushing large blocks of rock upward mountains, plateaus mountains, plateaus

19. Rocky Mountains Oh, Beautiful… Oh, Beautiful…

20. Himalayas plates push together plates push together edges may crumble and fold edges may crumble and fold creating mountains (most highest) creating mountains (most highest)

21. Himalayas Breathtaking!

22. Cascade Mountains 2 plates collide 2 plates collide One moves up over the other One moves up over the other

23. Homework Take notes Shaping Earth’s Surface pages 23-24

24. How are volcanoes formed? When 2 of Earth’s plates push against each other, the edge of one slides beneath the other When 2 of Earth’s plates push against each other, the edge of one slides beneath the other Heat within the mantle melts= magma Heat within the mantle melts= magma

25. Volcanoes lava is the name of magma that has escaped onto the surface lava is the name of magma that has escaped onto the surface openings through which lava flows are volcanoes openings through which lava flows are volcanoes

26. Activating Strategy Write 1 haiku about volcanoes Write 1 haiku about volcanoes Write 1 haiku about ‘shaping Earth’s surface’ Write 1 haiku about ‘shaping Earth’s surface’

27. Haiku to twist out of shape (5) to twist out of shape (5) people can twist, wrench or bend (7 syllables) people can twist, wrench or bend (7 syllables) very twisty too (5syllables) very twisty too (5syllables)

28. Homework September 26 Questions 1-4 page 25 in complete sentences