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11 August, 06:21

What is one of the reasons why scientists believe the outer core is liquid?

a. p-wave shadow zone.

b. s-wave shadow zone.

c. outer core fish fossils that have made their way to the surface.

d. negative gravity anomalies?

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  1. 11 August, 06:42
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    Scientists have obtained most of this information from natural geological activity.

    S-waves and p-waves are seismic waves - the waves of energy that travel through the Earth as a result of an earthquake. Both P - and S-waves travel easily through solids, but S-waves cannot pass through liquids, and they cannot pass through the outer core. Scientists know that Earth’s outer core is liquid because s-waves are not able to pass through it. When an earthquake occurs there is a "shadow zone" on the opposite side of the earth where no s-waves arrive.

    So, one of the reasons why scientists believe the outer core is liquid is the s-wave shadow zone.
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