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Answer:
Knowing how the waves behave as they move through different materials enables us to learn about the layers that make up the Earth. Seismic waves tell us that the Earth's interior consists of a series of concentric shells, with a thin outer crust, a mantle, a liquid outer core, and a solid inner core.
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Explanation:
Seismic waves can tell us a lot about the internal structure of the Earth because these waves travel at different speeds in different materials. ... Scientists are able to learn about Earth's internal structure by measuring the arrival of seismic waves at stations around the world.