Structure of the earth Flashcards
1
Q
crust
A
the outer layer of the earth
2
Q
plate margin
A
the boundary where the 2 plates meet
3
Q
mantle
A
the density between the outer layer and the crust
4
Q
convection currents
A
the circular currents of heat in the mantle
5
Q
oceanic crust
A
found under the worlds greatest ocean, 200 million years old, less dense, renewable
6
Q
continental
A
more dense, found in the greatest continents of the world, 3.8 billion years old, cant be destroyed
7
Q
what are tectonic plates
A
chunks of the earths crust (vary in size)
8
Q
constructive boundary
A
move away from each other
9
Q
destructive boundary
A
one goes under the other
10
Q
collision boundary
A
collide with each other
11
Q
conservative boundary
A
slip past each other
