The fluid core of the Earth
A)is mostly water that has leaked in from the oceans.
B)remains fluid because of heat generated by radioactive decay.
C)results from heat generated by the friction of the tectonic plates moving over each other.
D)is a watery substance that lubricates the movement of the tectonic plates.

Question

Quizplus · Accepted Answer

The fluid core of the Earth is mostly composed of molten iron and nickel, and it remains fluid due to the heat generated by radioactive decay. This heat sustains the temperature of the core above the melting point of the metallic elements, keeping it in a liquid state.

The Fluid Core of the Earth