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# 8 3.1 layers of the earth

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what are the layers of the Earth?
what are at least 3 characteristics of each Earth layer?
Even though scientists cannot travel into the various layers of the earth how do they infer what the structure of the Earth is? Provide 3 examples or more

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### 8 3.1 layers of the earth

1. 1. Layers of the Earth Intro http://player.discoveryeducation.com/in 8-3.1 dex.cfm?guidAssetId=C1B0E416-A17D- 45B6-875C- 88CCC8403AA7&blnFromSearch=1&prod uctcode=US
2. 2. VIW’s1. Crust2. Mantle3. Core4. Density5. Composition6. Lithosphere7. Asthenosphere8. Oceanic crust – basalt9. Continental crust - granite
3. 3. Learning Objectives8-3 The student will demonstrate an understanding of materials that determine the structure of the Earth and the processes that have altered this structure.8-3.1 Summarize the three layers of Earth – crust, mantle, and core – on the basis of relative position, density, and composition.
4. 4. Essential Information• The Earth has layers that have specific conditions (states) and composition (made up of).
5. 5. Summary of Earth’s LayersCopy Table into Notebook Layer Relative Position Density Composition Crust Outermost layer; thinnest under the ocean, thickest under continents; crust and top of mantle called the lithosphere Mantle Core
6. 6. Summary of Earth’s LayersCopy Table into Notebook Layer Relative Position Density Composition Crust Outermost layer; thinnest under the ocean, thickest under continents; crust and top of mantle called the lithosphere Mantle Middle layer, thickest layer; top portion called the asthenosphere Core
7. 7. Summary of Earth’s LayersCopy Table into Notebook Layer Relative Position Density Composition Crust Outermost layer; thinnest under the ocean, thickest under continents; crust and top of mantle called the lithosphere Mantle Middle layer, thickest layer; top portion called the asthenosphere Core Inner layer, consists of two parts – outer core and inner core
8. 8. Summary of Earth’s LayersCopy Table into Notebook Layer Relative Position Density Composition Crust Outermost layer; Least dense layer thinnest under the overall; Oceanic ocean, thickest crust (basalt) is under continents; more dense than crust and top of continental crust mantle called the (granite) lithosphere Mantle Middle layer, thickest layer; top portion called the asthenosphere Core Inner layer, consists of two parts – outer core and inner core
9. 9. Summary of Earth’s LayersCopy Table into Notebook Layer Relative Position Density Composition Crust Outermost layer; Least dense layer thinnest under the overall; Oceanic ocean, thickest crust (basalt) is under continents; more dense than crust and top of continental crust mantle called the (granite) lithosphere Mantle Middle layer, Density increases thickest layer; top with depth because portion called the of increasing asthenosphere pressure Core Inner layer, consists of two parts – outer core and inner core
10. 10. Summary of Earth’s LayersCopy Table into Notebook Layer Relative Position Density Composition Crust Outermost layer; Least dense layer thinnest under the overall; Oceanic ocean, thickest crust (basalt) is under continents; more dense than crust and top of continental crust mantle called the (granite) lithosphere Mantle Middle layer, Density increases thickest layer; top with depth because portion called the of increasing asthenosphere pressure Core Inner layer, consists Heaviest material; of two parts – outer most dense layer core and inner core
11. 11. Summary of Earth’s LayersCopy Table into Notebook Layer Relative Position Density Composition Crust Outermost layer; Least dense layer Solid Rock – mostly thinnest under the overall; Oceanic silicon and oxygen ocean, thickest crust (basalt) is Oceanic crust – under continents; more dense than basalt; crust and top of continental crust Continental crust – mantle called the (granite) granite lithosphere Mantle Middle layer, Density increases thickest layer; top with depth because portion called the of increasing asthenosphere pressure Core Inner layer, consists Heaviest material; of two parts – outer most dense layer core and inner core
12. 12. Summary of Earth’s LayersCopy Table into Notebook Layer Relative Position Density Composition Crust Outermost layer; Least dense layer Solid Rock – mostly thinnest under the overall; Oceanic silicon and oxygen ocean, thickest crust (basalt) is Oceanic crust – under continents; more dense than basalt; crust and top of continental crust Continental crust – mantle called the (granite) granite lithosphere Mantle Middle layer, Density increases Hot softened rock; thickest layer; top with depth because contains iron and portion called the of increasing magnesium asthenosphere pressure Core Inner layer, consists Heaviest material; of two parts – outer most dense layer core and inner core
13. 13. Summary of Earth’s LayersCopy Table into Notebook Layer Relative Position Density Composition Crust Outermost layer; Least dense layer Solid Rock – mostly thinnest under the overall; Oceanic silicon and oxygen ocean, thickest crust (basalt) is Oceanic crust – under continents; more dense than basalt; crust and top of continental crust Continental crust – mantle called the (granite) granite lithosphere Mantle Middle layer, Density increases Hot softened rock; thickest layer; top with depth because contains iron and portion called the of increasing magnesium asthenosphere pressure Core Inner layer, consists Heaviest material; Mostly iron and of two parts – outer most dense layer nickel; outer core – core and inner core slow flowing liquid, inner core, solid
14. 14. How can you use your hands to remember the layers of the Earth?
15. 15. Draw and label all 3 layers of the Earth
16. 16. • Outermost layer; thinnest under the ocean, thickest under continents; contains the lithosphere
17. 17. • Middle layer, thickest layer; top portion called the asthenosphere
18. 18. • Inner layer, consists of two parts
19. 19. • Heaviest material; most dense layer
20. 20. • Density increases with depth because of increasing pressure
21. 21. • Least dense layer overall; Oceanic crust (basalt) is more dense than continental crust (granite)
22. 22. • Hot softened rock; contains iron and magnesium
23. 23. • Solid Rock – mostly silicon and oxygen• Oceanic basalt• Continental granite
24. 24. • Mostly iron and nickel; outer slow flowing liquid, inner part, solid
25. 25. Solid Rock – mostlysilicon and oxygenOceanic crust – basalt;Continental crust –graniteHot softened rock;contains iron andmagnesiumMostly iron and nickel;outer core – slow flowingliquid, inner core, solid
26. 26. Layers of the Earth ProjectDirections:1. Accurately label the layers of the Earth – Include the relative position – Density – composition2. Include at least 3 major features for each Earth layer
27. 27. M&M Earth’s
28. 28. The lithosphere is a "rocky“ rigid outermost shell of a rocky planet.On Earth, it comprises the crust and the portion of the upper mantlethat behaves elastically on time scales of thousands of years or more.
29. 29. Asthenosphere - is a portion of the upper mantle just below the lithosphere thatis involved in plate tectonic movements. The asthenosphere is a highly viscous,mechanically weak deforming region, but pressures keeps it like a thick soupyplastic. The Asthenosphere has a relatively low density so Seismic waves passrelatively slowly through the asthenosphere compared to the overlyinglithosphere.
30. 30. Geologists Notebook: Digging Through Earthhttp://player.discoveryeducation.com/index.cfm?guidAssetId=AF8AEACA-F326-442B-A837-546E77BD2358&blnFromSearch=1&productcode=US
31. 31. PoP- Layers of the Earth• http://www.youtube.com/watch?v=Q9j1xGaxYzY
32. 32. • The chart below shows data about the Earths layers.What information can be concluded from the information in the chart?A. The temperature of the earth increases as you go deeper into the earthB. The density of the earth gets greater as you go deeper into the earthC. The temperature of the earth decreases as you go deeper into the earthD. The density of the earth decreases as you go deeper into the earth
33. 33. Use the table below to answer the following question:The table above describes the layers of the Earth. Which of the following correctly labels these layers? A. Layer A = Core ; Layer B = Crust ; Layer C = Mantle B. Layer A = Mantle ; Layer B = Core ; Layer C = Crust C. Layer A = Core ; Layer B = Mantle ; Layer C = Crust D. Layer A = Crust ; Layer B = Mantle ; Layer C = Core
34. 34. Which of the following statements is true about Earth’s crust? A. It is thicker under the continents than under the ocean. B. It is more dense than other layers. C. It is the only layer where gravity exists. D. It is the origin of the earth’s magnetic field.
35. 35. Which of the following inferences help scientists conclude Earths magnetic poles are constantly changing?A. Earth contains a magnetic liquid.B. Earth contains very dense solids.C. Earth contains a magnetic solid.D. Earth contains a very dense liquid.
36. 36. Assessment ChecklistSummarize major points about the layers of EarthGeneralize major points about the crustGeneralize major points about the mantleGeneralize major points about the core of EarthCompare the layers of the EarthClassify and sequence the layers using informationIdentify each layer according to its properties
37. 37. What does this evidence suggest about Earth’s Structure?
38. 38. My Model CrustOceanic Mantle Asthenospherecrust Outer core Inner core lithosphere
39. 39. Cool Websites• http://www.youtube.com/watch?v=FgPbzEkzB ek&feature=related