Evidence to support that the inner core is solid and the outer ...

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Evidence to support that the inner core is solid and the outer core is liquid comes from
 
  A) refraction of seismic waves as they encounter different mediums.
  B) the wave shadow effect of P- and S-waves as they encounter the solid and liquid core.
  C) the wave shadow effect of P- and S-waves, and the increase in velocity of P-waves as they encounter the solid inner core.
  D) the inner core is not solid, but is liquid.

Question 2

The Mohorovicic discontinuity occurs because of a
 
  A) change in temperature with depth.
  B) shift in the density of minerals with the same composition.
  C) change in the composition of rocks on both sides of the boundary.
  D) density change in rocks of the same composition on both sides of the boundary.

[14vl19]

Answer to Question 1

Answer: C

Answer to Question 2

Answer: C