Presentation on theme: " Inner core – hot, solid iron and nickel Outer core – hot, molten iron and nickel Mantle – hot rock Crust – solid outer layer of the Earth 1."— Presentation transcript:
Inner core – hot, solid iron and nickel Outer core – hot, molten iron and nickel Mantle – hot rock Crust – solid outer layer of the Earth 1. List and describe the layers of the Earth in order from the interior out.
Both Increase 2. Temperature and pressure both ______________ with depth.
Seismic Waves from earthquakes 3. How do scientists study the interior of the Earth?
Sonar 4. What technology gave us the first look at the ocean floor?
Iron Nickel 5. What makes up the inner core and outer core?
Evidence from Landforms Evidence from Fossils Evidence from Climate 6. What 3 types of evidence did Alfred Wegener use to support his theory of continental drift?
Alfred Wegener’s supercontinent 7. What is Pangaea?
Subduction is the process by which old oceanic crust is pushed back down into the mantle melting rock and turning it back into molten material. Subduction takes place at deep ocean trenches where convection currents are causing two lithospheric plates to move/push together. 8. What is subduction? When and why does subduction take place
Longest chain of mountains located on the ocean floor 9. What is the mid-ocean ridge
Process by which new material is continually added to the ocean floor and happens at the mid-ocean ridge 10. Explain the process of sea-floor spreading and where does it take place.
Convection currents 11. The movement of the plates is caused by ________________.
Plate Tectonics – pieces of Earth’s lithosphere are in constant slow motion, driven by convection currents in the mantle. Continental Drift – all continents were once joined together in a single landmass and has since drifted apart. 12. Explain the Theory of Plate Tectonics and Continental Drift.
Transform boundary – 2 plates slip past each other causing earthquakes 13. List and describe the 3 types of plate boundaries
A rift valley forms where two continental and continental plate move away from each other. 14. A rift valley forms where two plates do what?
Uppermost part of the mantle and the crust together form a rigid layer of rock 15. What is the lithosphere?
Layer beneath the lithosphere that is less rigid then the rock above it 16. What is the asthenosphere?
The warm less dense material rises and the cool more dense material sink causes movement of the plates 17. Explain how convection currents in the mantle cause the lithospheric plates to move
At the mid-ocean ridge through sea- floor spreading 18. Where is new ocean crust created?
Convergent oceanic and oceanic plates – 1 plate is subducted (the more dense plate) through a trench and forms a chain of volcanic islands Convergent oceanic and continental plates – oceanic is more dense and is subducted under the continental plate. Volcanoes on land are produced. Convergent continental and continental plate – 2 continental plates collide, crust buckles and mountain ranges are formed. 19. Explain the 3 types of convergent boundaries and what each produces.
Core 20. The Earth has a magnetic field because of the __________.
Oceanic crust is more dense than continental crust. It also moves through the rock cycle faster than continental crust. New ocean crust is created at the mid-ocean ridge and old ocean crust is subducted at a trench. 21. What is the difference between continental and oceanic crust? Why is ocean crust younger than continental crust?
Oceanic crust is pushed back into the mantle and forms molten material (subducted). 22. What happens at trenches on the ocean floor?
The amount of matter in a given amount of space. Density = mass/volume 23. What is density?
Divergent boundary 24. What type of boundaries form at the mid-ocean ridge?
Asthenosphere 25. Which layer do the Earth’s plates float on?
Oceanic crust is more dense than continental 26. Explain why oceanic crust is subducted at an oceanic and continental convergent boundary