1.
Geologists use the seismic waves to study the interior of the earth.
2.
The two types of seismic waves are the body waves and love waves
3.
The P-waves is the fastest among all the seismic waves.
4.
The crust is the thickest part of the earth's interior.
5.
The granite rocks in the continental crust are less dense than the basalt
6. Below the crust is the core.
7.
The upper mantle is approximately 1400 kilometers in thickness
8.
Asthenosphere region has high temperature to keep rocks in semi-mo
9. In convection current, hot materials are transfer to the Asthenosphere
while cooler denser materials from the crust transfer down.
10. The outer core is a liquid layer, which is about 2200 kilometers in th
nickel.​