Earth's internal layers were discovered by studying the movement ...

[jon_i]

Earth's internal layers were discovered by studying the movement of P- and S- waves through Earth's interior. In comparison to S-waves, the movement of P-waves is
 
  A) fast, compressing and expanding the rock as they move through it.
  B) fast, vibrating the rock particles up and down and side-to-side.
  C) slower and can travel through solid granite, magma, water or air.
  D) slower and can travel only through solids, not liquids.

Question 2

The movement of seismic waves through Earth's interior provides evidence of internal layering. The first boundary discovered was between the
 
  A) upper and lower mantle.
  B) inner and outer core.
  C) outer core and the mantle.
  D) mantle and the crust.

[Carliemb17]

Answer to Question 1

Answer: A

Answer to Question 2

Answer: C

[jon_i]

Thanks

[Carliemb17]

Welcome