The Graph Below Shows the Change in Velocity of Seismic

question 2

Multiple Choice

The graph below shows the change in velocity of seismic waves with depth in the crust.Why does the velocity of the P-wave drop drastically at the core-mantle boundary?

• A)because the core is much denser than the mantle
• B)because the outer core is solid and P-waves can't pass through solids
• C)because the outer core is liquid and seismic waves travel slower in liquids
• D)because the S-waves are removed and that energy is transferred to the P-waves

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