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Structure of the Earth
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How do scientists study the interior of the Earth?
They study seismic waves.
What is the average temperature of the inner core?
5000-6000*C
Which layer of the Earth spins at a speed faster than the Earth rotates?
Inner Core
What is the average temperature of the outer core?
4000-5000*C
What is the outer core made of?
Liquid iron and nickel
What is the second largest layer of the Earth?
Outer Core
What is the average temperature in the mantle?
3000*C
What is convection?
The process by which heat causes material to expand and rise where it then cools and falls back down
What is the mantle composed of?
Silicate rocks that are rich in magnesium and iron
What is the solid outer section of Earth which includes the crust and the cool, dense, rigid upper part of the mantle?
Lithosphere
How thick is the crust?
5-50 km
What is continental crust?
The layer of rock that forms the continents
Which type of crust is younger or newer?
Oceanic crust
Which type of crust is thinner: oceanic or continental?
Oceanic
What type of rock is oceanic crust mostly made of?
Basalt
Which is more dense: oceanic crust or continental crust?
Oceanic crust
Where do you find continental crust?
Under land
Where do you find oceanic crust?
Under the oceans
What layer is below the outer core?
Inner core
What layer is below the mantle?
Outer Core
What layer is under the crust?
Mantle
What is the outer layer of the Earth?
Crust
What rock type is found most readily in the crust?
Granite
Which layer is divided into two different types: oceanic and continental?
Crust
Which layer has strong convection currents which are responsible for the Earth's crust movement?
Mantle
What is the inner core made of?
Solid iron and nickel
Which layer of the Earth is responsible for the Earth's magnetic field?
Outer Core
Which layer is plastic-like and allows the crust to flow over it?
Asthenosphere
What is the thinnest layer of the Earth?
Crust
What is the largest layer of the Earth?
Mantle
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