Question

How do seismic waves help scientists understand Earth's layers? Select the two correct answers. (1 point)
Scientists can observe how seismic waves multiply when passing through different layers.
Scientists can observe how seismic waves change speeds when passing through different layers.
Scientists can observe which seismic waves change the composition of the layers they pass through.
O Scientists can observe which seismic waves cannot pass through certain layers.
Scientists can generate seismic waves in order to observe their paths through Earth.

Answer 1

Seismic waves help scientists understand Earth's layers by:

• Scientists can observe how seismic waves change speeds when passing through different layers.

• Scientists can observe which seismic waves cannot pass through certain layers.

What are Seismic waves?

These are waves which are generated as a result of the movement of

materials in the earth. They change speed as a result of the collision with

materials in the earth and know the types of material present as a result of

some types not being able to pass through certain medium.

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