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10 September, 01:29

Explain how earthquake waves give scientists evidence that part of the Earth's core is liquid.

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  1. 10 September, 02:07
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    Two types of seismic waves are released when an earthquake occurs: they are called P-waves (primary-waves) and S-waves (secondary waves). One of the main difference between the two types of waves is that P-waves are able to travel through solids and liquids, while S-waves travel only through solids.

    When an earthquake happens, seismic waves are detected in different locations of the world, because from the hypocenter they travel everywhere. However, S-waves do not reach the opposite side of Earth, because they cannot travel through the outer core which is liquid, so only the P-waves are detected on the other side of Earth and this is a proof that the outer core is liquid.
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