Geography - Unit 1 Flashcards
Earth Structure Earthquakes & Volcanoes
1
Q
Layers of Earth from inside to out
A
Solid Inner Core, Liquid Outer Core, Plastic Mantle, Solid Crust
2
Q
What is the Inner Core made of? And what special feature does it give the Earth?
A
Iron & Nickel, spins to give electromagnetic field
3
Q
Why is the Outer Core liquid?
A
Because the Inner Core is very hot
4
Q
Define Magma
A
Semi-molten (plastic) rock within the Mantle
5
Q
Define Lava
A
De-gassed form of magma, once magma escapes onto surface
6
Q
Define Mantle
A
Thickest layer within the Earth, upper-most part (100-200km) is called the asthenosphere
7
Q
Define Asthenosphere
A
The most ‘plastic’ layer within the mantle where convection currents occur
