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Questions and Answers
What is the composition of Earth's inner core?
What is the composition of Earth's inner core?
- Solid iron and nickel (correct)
- Molten rock
- Liquid iron and nickel
- Metal and rock
Where do convection currents occur in the Earth's interior?
Where do convection currents occur in the Earth's interior?
- In the inner core
- In the crust
- In the mantle (correct)
- In the Earth's atmosphere
What causes the movement of tectonic plates?
What causes the movement of tectonic plates?
- Earth's rotation speed
- Gravitational pull from other planets
- Friction between the inner core and mantle
- Convection currents in the mantle (correct)
What can result from tremendous stresses along faults in the Earth's crust?
What can result from tremendous stresses along faults in the Earth's crust?
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Which layer of Earth is described as a thin layer that we live on?
Which layer of Earth is described as a thin layer that we live on?
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Study Notes
- Earth's inner core is 750 miles thick, made of solid iron and nickel, surrounded by superheated metal and rock in the mantle.
- The Earth's crust, where we live, is a thin layer less than 1% of Earth's mass and can be as little as four miles thick.
- The mantle, a fluid of molten rock, has convection currents where hot rock rises and cooler rock falls back down, pushing on the crust.
- The crust is broken into plates that move due to convection currents in the mantle, sometimes colliding or rubbing against each other.
- Tremendous stresses build up as plates push against each other until they rupture along faults, causing earthquakes.
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Description
Explore the composition of Earth's layers, from the solid inner core to the fluid mantle and the thin crust where life thrives. Learn how the movement of tectonic plates, driven by convection currents in the mantle, leads to earthquakes and other geological phenomena.
