Earths Structure Flashcards
(7 cards)
1
Q
What are the four layers of the earths structure?
A
Crust
Mantle
Outer core
Inner core
2
Q
What is the outer core made out of?
A
Nickel and iron
3
Q
What is the mantle?
A
Soft molten rock at around 380 degrees
4
Q
What is the inner core
A
Solid and about 5500 degrees
5
Q
Why do plates move?
A
Due to convection currents in the mantle
6
Q
What is the difference between continental and oceanic plate?
A
Continental crust=thicker and less dense older
Oceanic crust= thinner and more dense, younger, subducts
7
Q
What is the surface divided into?
A
Tectonic plates which float on the mantle and meet at plate boundaries/margins
