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Unit 7
Earth Layers and Plate Tectonics
Question | Answer |
---|---|
Asthenosphere | The Lithosphere "floats" on this semi-solid layer made up of the upper part of the mantle. |
Convection Currents | Heat from the core and the mantle cause the plates to move. |
Convergent | A plate boundary where two plates move toward each other. |
Crust | The thinnest and solid outermost layer of the Earth. |
Divergent | A plate boundary where two plates move away from each other. |
Inner core | A dense sphere of solid iron and nickel at the center of the Earth; extreme heat and pressure and temperatures like the surface of the Sun. |
Lithosphere | The crust and upper part of the mantle and also contains the plates. |
Outer core | The liquid layer of the Earth's core that surrounds the inner core; made up of liquid iron and nickel. |
Plasticity | A solid that flows like a liquid. |
Transform | The plate boundary between tectonic plates that are sliding past each other. |