Geophysics 20 Lecture 9 Study Questions

Earthquakes

Study questions: Structure of the Earth


1) What is meant by the radius of the earth?

2) How does the average density of the earth compare to the density of 
typical rocks that are observed near the surface?

3) What are the four major divisions of the Earth?

4) Give the radii or depths in kilometers to the boundaries between these 
major divisions.

5) What is the primary difference between the outer core and inner core?

6) What are the lithosphere and the asthenosphere? 

7) Is a PcPKS wave possible in the earth? How about sScSSKP?

8) The phases PP and pP both have been reflected at the surface of the 
earth. What is the difference between them?