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Sol 5.7 d and e changing earth
- 1. Has our Earth alwayslooked the same?
- 2. Darn you Scrat!!! •http://www.youtube.com/watch?v=cb9e35ty CE4
- 3. This is whatour Earth looks like today
- 4. Our continents wereone HUGE continent called Pangaea
- 5. What happened tothe continents?
- 6. Driftin’ . .. The slow movement of the continents is called continental drift! The idea of continental drift is that, gradually and over millions of years, the continents are moving around the surface of the Earth. Millions of years from now, the Earth will appear differently because the continents will be in different places!
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- 8. • The crustis not one large sheet • The crust is made up of many different pieces, or PLATES, tectonic plates
- 9. There are TWOdifferent types of crust. – Continental Crust • Crust UNDER the continents • Thicker than the crust under the ocean – Ocean Crust • Crust UNDER the ocean • Thinner than the crust under the continents • Heavier than continental crust The Crust
- 10. Granite Rock The Crust BasaltRock Continental Crust Oceanic Crust
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- 13. Tectonic Plates • Sometimes,plates PUSH together • Sometimes, plates PULL APART • Sometimes, plates SLIDE PAST each other • Boundaries are where two plates meet
- 14. Convergent Boundaries Convergent Boundariesare where plates come together or COLLIDE
- 15. Which is heavier-continental plates or plates under the ocean? Plates under the ocean! So, what do you think will happen if a continental plate and an oceanic plate collide? Let’s Review
- 16. Let’s Review • Theoceanic plate will SINK because it is heavier! VOLCANOES AND TRENCHES WILL FORM!
- 17. Where plates collideyou can get: Mountains Volcanoes Earthquakes Trenches Tectonic Plates
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- 19. Himalayas Mount Everest isthe highest mountain in the world!
- 20. Mariana Trench The Mariana’sTrench is the deepest part in the Ocean!
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- 22. Divergent Boundaries Divergent Boundariesare where plates move away from each other or DIVIDE
- 23. What do youthink will happen if two plates MOVE APART?
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- 25. Sliding Boundary Where twoplates SLIDE past each other!
- 26. What happens .. . • . . . When those two tectonic plates slide past each other?? • They are pushing and pushing . . . Pressure is building and building . . . .until finally . . . . BOOM! • The pressure releases, the plates slide . . . And you get an EARTHQUAKE!!!!
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- 31. San Andreas Fault inCalifornia
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