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Lithosphere- made up of the crust and very top of the mantle- also known as a tectonic plate Asthenosphere - hotter, softer layer of rock on which the lithosphere rests. Ocean crust is ______ Continent crust is ____.
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Lithosphere- made up of the crust and very top of the mantle- also known as a tectonic plate Asthenosphere- hotter, softer layer of rock on which the lithosphere rests. Ocean crust is ______ Continent crust is ____ To understand how plates move, here are more details about the Earth’s crust:
Continental Drift- Alfred Wegener said that the continents used to be all together in one large landmass called: Pangaea Evidence: Similar rocks and Similar fossils on different continents Can you create Pangaea?
The Seafloor is spreading apartMid-Atlantic ridge- underwater mountain range formed by convection currents in the asthenosphere
1. Divergent Boundary a. Ocean-ocean pulling apart b. Forms underwater mountain range c. Mid- Atlantic Ridge
1. Divergent boundary a. Continent- continent pulling apart b. Forms a rift valley c. Africa- Great Rift Valley
2.Convergent- a. ocean-ocean coming together b. Forms a trench and subduction zone Forms volcanic islands c. Japan
2.Convergent Boundarymoving together Continent- continent coming together b. Forms mountains c. Himalayas- Mt. Everest
2. Convergent Boundary a. Ocean- continent b. Forms a trench and volcanic mountains c. Washington State and Andes mountains in South America
3.Transform boundarysliding past each other b. Forms earthquakes c. San Andreas Fault in California