The Graph Below Shows the Change in Velocity of Seismic

question 15

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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Definitions:

Anterograde Amnesia

A condition in which people lose the ability to form new memories after experiencing a brain injury.

Retrograde Amnesia

A loss of memory for events that occurred before a certain point in time, often due to brain injury or diseases.

Anterograde Amnesia

An inability to form new memories following the onset of an amnesia-causing event, though long-term memories from before the event may remain intact.

Hippocampus

A region of the brain associated with the formation of new memories and spatial navigation.