UNIVERSE
PLANETARY INTERIORS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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What creates Earth’s magnetic field?
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movement of liquid inner core
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movement of liquid outer core
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movement of liquid asthenosphere
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movement of liquid lithosphere
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Explanation:
Detailed explanation-1: -The Earth’s outer core is in a state of turbulent convection as the result of radioactive heating and chemical differentiation. This sets up a process that is a bit like a naturally occurring electrical generator, where the convective kinetic energy is converted to electrical and magnetic energy.
Detailed explanation-2: -Deep within Earth, swirling liquid iron generates our planet’s protective magnetic field. This magnetic field is invisible but is vital for life on Earth’s surface: it shields the planet from harmful solar wind and cosmic rays from the sun.
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