P1 - Seismic Waves Flashcards

(9 cards)

0
Q

What are the two different types of seismic waves?

A

P-waves and S-waves.

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1
Q

What do seismologists do?

A

Measure the time it takes the shock to reach or not reach each seismograph, which are placed all over the planet.

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2
Q

What type of wave is a p-wave?

A

They’re longitude.

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3
Q

How do we now the outer core is liquid? (according to seismic waves)

A

S-waves only travel through solids and they are not detected in the cores shadow.

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4
Q

How do we know there is a sudden change in properties in the earth?

A

Because p-waves change direction abruptly, they get refracted.

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5
Q

Why do we think the middle of the core is solid?

A

Because p-waves travel slightly faster through it.

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6
Q

Why do we think the mantle is solid?

A

S-waves can travel through it.

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7
Q

What is a kink?

A

A kink is when the path of a p-wave changes abruptly due to a change in material.

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8
Q

What type of wave is an s-wave?

A

It’s transverse.

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