Seismotectonics

Question 1

name the layers in the earth’s structure

Answer 1

lithosphere (cool, hard rock)
Asthenosphere (weak "soft" rock)
Mesosphere (dense, rigid rock)
Outer Core (liquid nickel and iron)
Inner Core (solid Nickel and iron)

Question 2

how thick is the earth’s crust (roughly)

Answer 2

0 - 100km

Question 3

what depths is the asthenosphere?

Answer 3

100-200km

Question 4

what key role does the asthenosphere play?

Answer 4

it decouples the lithosphere (tectonic plates) from the rest of the mantle