Structure of the earth Flashcards
1
Q
What is the inner core?
A
A solid ball containing iron and nickel
2
Q
What is the outer core?
A
Semi-molten and contains iron and nickel
3
Q
What is the mantle most made of?
A
Silicate rocks
4
Q
What are some features of the mantle? 3
A
Part of mantle nearest the core is rigid
The layer above the part nearest to the core is called the asthenosphere and is semi-molten
Top part of the mantle is rigid
5
Q
What it the outer layer of the earth called?
A
The crust
6
Q
What is the lithosphere?
A
The rigid top part of the mantle and crust
7
Q
What are the features of continental crust? 2
A
Thicker (30-70 km thick)
less dense
8
Q
What are features of oceanic crust? 2
A
Thinner (6-10 km thick)
More dense
