Structure Of The Earth Flashcards
The Earth has a ____________ Structure.
Layered.
At the Centre of the Earth is the ______.
Core.
The Core is a Ball of Solid (_______) and ________ (Outer) Iron and Nickel.
Inner…Liquid…
At the Earth’s Centre, it’s Very ________. It Becomes _____ Dense Further Out.
Dense…Less…
The Temperature Inside the ______ Ranges from 4400-______°C.
Core…6000…
Around the Earth’s Core is the _________.
Mantle.
The Mantle is Made up of Silicon-Based _______.
Rocks.
The Part of the Mantle Nearest to the Core is Quite _______.
Rigid.
The Layer Above the Mantle is called the ________________, which is Semi-Molten.
Asthenosphere.
The Top of the Mantle is ________.
Rigid.
The Temperature of the Mantle is Between 1000°C and _______°C.
3700.
The Solid Outer _______ of the Earth is called the _______.
Layer…Crust…
The Crust is made up of Silicon-Based _______.
Rocks.
What are the Two Types of Crust?
Continental and Oceanic.
Continental Crust is Thicker and _____ Dense.
Less.
Oceanic Crust is Thinner and More ________.
Dense.
The Crust is Divided into Slabs called ____________ Plate.
Tectonic.
Tectonic Plates Move Due to ____________ Currents in the Mantle.
Convection.
1) Tectonic Plates Float on the _________.
Mantle.
2) Radioactive Decay of some ___________ in the Mantle and Core Generate a Lot of ______.
Elements…Heat…
3) When Lower Parts of the Asthenosphere Heat Up, they Become Less ________ and Slowly ______.
Dense…Rise…
4) As the ________ Parts of the Asthenosphere Move Towards the Top, they ______ Down, Become More _______ and Slowly Sink.
Lower…Cool…Dense…
What are Convection Currents?
Circular Movements of Semi-Molten Rock.
Convection Currents in the Asthenosphere Create _____ on the Base of the Tectonic ________, Causing them to Move.
Drag…Plates…
