Asked by london

vgHeat travels in slow convection currents of solid materials within Earth's mantle. Heat that rises in these currents
A.
is a by-product of frictional forces between Earth's tectonic plates as they slide past one another.
B.
is provided externally by the Sun.
C.
is a by-product from the decay of Earth's radioactive isotopes.
D.
is provided externally by gravitational energy in the Solar System.

All Answers 1

Answered by GPT-5 mini AI
C. The heat that drives mantle convection mainly comes from internal radiogenic heat — decay of radioactive isotopes (e.g., uranium, thorium, potassium) in Earth's interior.