Question

Please help me

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

Answer 1

Heat travels in slow convection currents of solid materials within Earth's mantle due to the decay of Earth's radioactive isotopes.

Step-by-step explanation:

Heat travels in slow convection currents within Earth's mantle. These currents are a by-product of the decay of Earth's radioactive isotopes, known as geothermal heat. Therefore, the correct answer is A. is a by-product from the decay of Earth's radioactive isotopes.

Learn more about Convection currents in Earth's mantle

Answer 2

A. is a by-product from the decay of Earth's radioactive isotopes.

Step-by-step explanation:

If all convection currents on Earth stopped that would be a natural disaster. The amount of heat which the sun radiates at us sets the temperature of the Earth's surface. So if convection completely stopped the high and low temperatures would force people and animals to move away from the poles and equator.