Question

Q.Why Earth's core is so hot?​

Answer 1

Hello there.

There are mainly three reasons for Earth's core being hot. They are as follows -

• The heat which was present during the creation of earth may would have been there till now.
• The decomposition and decaying of radioactive elements is also another reason.
• And the last reason is frictional heating caused by sinking of core material.

Hope the answer helps you.

Answer 2

Earth's inner core is the innermost geologic layer of the planet Earth. It is primarily a solid ball with a radius of about 1,220 km (760 mi), which is about 20% of Earth's radius or 70% of the Moon's radius.

There are no samples of Earth's core accessible for direct measurement, as there are for Earth's mantle. Information about Earth's core mostly comes from analysis of seismic waves and Earth's magnetic field.[3] The inner core is believed to be composed of an iron–nickel alloy with some other elements. The temperature at the inner core's surface is estimated to be approximately 5,700 K (5,430 °C; 9,800 °F), which is about the temperature at the surface of the Sun

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