Question

The behaviour of sea waves tell us about the earth's interior True/False
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Answer 1

Answer:

solution given below

Explanation:

When an earthquake occurs the seismic waves (P and S waves) spread out in all directions through the Earth's interior. Seismic stations located at increasing distances from the earthquake epicenter will record seismic waves that have traveled through increasing depths in the Earth.

Seismic velocities depend on the material properties such as composition, mineral phase and packing structure, temperature, and pressure of the media through which seismic waves pass. Seismic waves travel more quickly through denser materials and therefore generally travel more quickly with depth. Anomalously hot areas slow down seismic waves. Seismic waves move more slowly through a liquid than a solid. Molten areas within the Earth slow down P waves and stop S waves because their shearing motion cannot be transmitted through a liquid. Partially molten areas may slow down the P waves and attenuate or weaken S waves.

Answer 2

Answer:

Waves can travel through liquid but much more slowly than through a solid. When P waves hit the outer core, they slow considerably, telling us that they've reached a much denser material than in the mantle. Another significant change in wave speed occurs at the edge of the inner core.