Plate boundaries 8-3.6 Chapter 6, lesson 3 Page 198-205.
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Transcript of Plate boundaries 8-3.6 Chapter 6, lesson 3 Page 198-205.
![Page 1: Plate boundaries 8-3.6 Chapter 6, lesson 3 Page 198-205.](https://reader035.fdocuments.in/reader035/viewer/2022072010/56649dd25503460f94ac930e/html5/thumbnails/1.jpg)
Plate boundaries
8-3.6Chapter 6, lesson 3
Page 198-205
![Page 2: Plate boundaries 8-3.6 Chapter 6, lesson 3 Page 198-205.](https://reader035.fdocuments.in/reader035/viewer/2022072010/56649dd25503460f94ac930e/html5/thumbnails/2.jpg)
Divergent boundary
• Where 2 plates are moving apart• Most are located along mid-ocean ridge (sea
floor spreading)• New crust forms b/c magma pushes up &
hardens between separating plates
![Page 3: Plate boundaries 8-3.6 Chapter 6, lesson 3 Page 198-205.](https://reader035.fdocuments.in/reader035/viewer/2022072010/56649dd25503460f94ac930e/html5/thumbnails/3.jpg)
Convergent boundary
• Where 2 plates come together & collide• Activity depends on the types of crust that meet• More dense oceanic plate slides under less dense
continental plate or another oceanic plate -subduction zone , some crust is destroyed
• 2 continental plates converge, both plates buckle & push up into mountain ranges
![Page 4: Plate boundaries 8-3.6 Chapter 6, lesson 3 Page 198-205.](https://reader035.fdocuments.in/reader035/viewer/2022072010/56649dd25503460f94ac930e/html5/thumbnails/4.jpg)
Transform boundary
• Where 2 plates slide past each other• Crust is neither created nor destroyed• Earthquakes occur frequently along this type
of boundary
![Page 5: Plate boundaries 8-3.6 Chapter 6, lesson 3 Page 198-205.](https://reader035.fdocuments.in/reader035/viewer/2022072010/56649dd25503460f94ac930e/html5/thumbnails/5.jpg)
![Page 6: Plate boundaries 8-3.6 Chapter 6, lesson 3 Page 198-205.](https://reader035.fdocuments.in/reader035/viewer/2022072010/56649dd25503460f94ac930e/html5/thumbnails/6.jpg)
Changes of Landforms over Geologic Time
• Plates move @ very slow rates- from about 1 to 10 cm per year
• At 1 time- continents joined together in one large landmass called Pangaea
• As plates continued to move & split apart, oceans were formed, landmasses collided 7 split apart until Earth’s landmasses came to be in the positions they are in now
![Page 7: Plate boundaries 8-3.6 Chapter 6, lesson 3 Page 198-205.](https://reader035.fdocuments.in/reader035/viewer/2022072010/56649dd25503460f94ac930e/html5/thumbnails/7.jpg)
Evidence
• Evidence of these landmasses, collisions, & splits comes from fossils, landform shape, features, rock structures, & climate changes
• Landmasses changes can occur at hot spots within the lithospheric plates
• Hot spot- area of volcanic activity in the middle of a tectonic plate
• Earth’s landmasses will continue to move & change during the geologic time of the future