earth structure Flashcards
1
Q
Crust
A
Thin, outer-layer of the earth
2
Q
Mantle
A
Composed mainly of silicate rocks, which contain a lot of magnesium and iron.
It extends to a depth of 2900 km.
3
Q
Core
A
Contains iron and nickel.
Situated approximately 6371 km below the surface.
4
Q
Tectonic plates
A
Tectonic plates are pieces of Earth’s crust and uppermost mantle, together referred to as the lithosphere.
