GENERAL KNOWLEDGE

GK

GENERAL SCIENCE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What layer of the earth is inferred to be liquid in form?
A
crust
B
mantle
C
outer core
D
inner core
Explanation: 

Detailed explanation-1: -The metallic nickel–iron outer core is liquid because of the high temperature. However, the intense pressure, which increases towards the inner core, dramatically changes the melting point of the nickel–iron, making it solid.

Detailed explanation-2: -Scientists found out that the outer core was liquid due to the formation of S-wave shadow zones or areas where the S-waves are not detected. During an earthquake, the body waves, which consist of the P-wave and the S-wave travel through the layers of the Earth.

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