SOLAR SYSTEM

Detailed explanation-1: -Scientists discovered that Earth’s outer core is liquid by observing seismic waves. P waves travel through solid and liquid, but S waves do not travel through liquid.

Detailed explanation-2: -Shear waves cannot travel in liquids or gases–so, for example, S waves don’t travel through the ocean or through the outer core.

Detailed explanation-3: -Answer and Explanation: The seismic waves that get refracted and cannot pass through the core of the Earth are: S-waves. S-waves or secondary waves are shear or transverse body waves that passes through the solid parts of the Earth.

Detailed explanation-4: -Flexi Says: P-waves and S-waves are known as body waves because they move through the solid body of the Earth. P-waves travel through solids, liquids, and gases. S-waves only move through solids. S-waves disappear at the mantle core boundary, so we know the outer core is liquid.

Detailed explanation-5: -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.