1. Restless EarthGCSE Geography Lesson Focus: Why is Africa being torn apart? Lesson Focus: Why is Africa being torn apart? By the end of this lesson, you should be able to: - describe how Africa is splitting apart - explain why Africa is splitting apart By the end of this lesson, you should be able to: - describe how Africa is splitting apart - explain why Africa is splitting apart © Teachable and james yeoman. Some rights reserved. http://teachable.net/res.asp?r=8262

2. Restless EarthGCSE Geography The Great Rift Valley © Teachable and james yeoman. Some rights reserved. http://teachable.net/res.asp?r=8262

3. Restless EarthGCSE Geography © Teachable and james yeoman. Some rights reserved. http://teachable.net/res.asp?r=8262

4. 1) away from each other. The molten 2) apart creating new crust as it does. When this process happens within a continent it 3) break and separate. This Great Rift Valley is a constructive plate 4) magma rising from deep within the mantle, pushing up the 5) level but occupied by lakes at several locations. The Red 6) slowly moving 7) collect, eventually forming a sea. In East Africa, the plate has 8) crust. The pressure is forcing the African continent to 9) is called rifting. As the Great Rift Valley expands, water will 10) margin where the plates are 11) rock continues to push the crust 12) not been completely rifted and the rift valley is still above sea Sequencing Task Beneath East Africa is a hot spot, a plume of hot... Sequencing Task Beneath East Africa is a hot spot, a plume of hot...... Sea is a more developed rift. © Teachable and james yeoman. Some rights reserved. http://teachable.net/res.asp?r=8262

5. Sequencing Task Beneath East Africa is a hot spot, a plume of hot...... Sea is a more developed rift. 4. magma rising from deep within the mantle, pushing up the 8. crust. The pressure is forcing the African continent to 3. break and separate. This Great Rift Valley is a constructive plate 10. margin where the plates are 6. slowly moving 1. away from each other. The molten 11. rock continues to push the crust 2. apart creating new crust as it does. When this process happens within a continent it 9. is called rifting. As the Great Rift Valley expands, water will 7. collect, eventually forming a sea. In East Africa, the plate has 12. not been completely rifted and the rift valley is still above sea 5. level but occupied by lakes at several locations. The Red 4. magma rising from deep within the mantle, pushing up the 8. crust. The pressure is forcing the African continent to 3. break and separate. This Great Rift Valley is a constructive plate 10. margin where the plates are 6. slowly moving 1. away from each other. The molten 11. rock continues to push the crust 2. apart creating new crust as it does. When this process happens within a continent it 9. is called rifting. As the Great Rift Valley expands, water will 7. collect, eventually forming a sea. In East Africa, the plate has 12. not been completely rifted and the rift valley is still above sea 5. level but occupied by lakes at several locations. The Red © Teachable and james yeoman. Some rights reserved. http://teachable.net/res.asp?r=8262

6. A cross-section of the Great R _ _ T valley in E _ _ T Africa which has been annotated to show how it has formed. Hot M _ _ _ A is rising through the thinning C_ _ _ T As the plates move apart the land S _ _ _ _ _ _ S (sinks) creating a valley Over time, the valley fills with W _ _ _ R, forming lakes, and over time, new S _ _ S and oceans Steep R _ _ _ _ S form on the sides of the rift valley, including some V_ _ _ _ _ _ _ S where magma reaches the surface Scientists believe that a H _ T spot in the M_ _ _ _ E below has opened up the rift valley on the surface The crust is separated into two different plates which are moving A _ _ _ T © Teachable and james yeoman. Some rights reserved. http://teachable.net/res.asp?r=8262

7. A cross-section of the Great RIFT valley in EAST Africa which has been annotated to show how it has formed. Hot MAGMA is rising through the thinning CRUST As the plates move apart the land SUBSIDES (sinks) creating a valley Over time, the valley fills with WATER, forming lakes, and over time, new SEAS and oceans Steep RIDGES form on the sides of the rift valley, including some VOLCANOES where magma reaches the surface Scientists believe that a HOT spot in the MANTLE below has opened up the rift valley on the surface The crust is separated into two different plates which are moving APART © Teachable and james yeoman. Some rights reserved. http://teachable.net/res.asp?r=8262