¿Por Qué Hace Calor Bajo Tierra?

The video discusses Lord Kelvin's theory that Earth was born hot and has been cooling like a roast potato. Kelvin estimated Earth's age to be 20 million years, which was incorrect due to high temperatures near the surface. The discovery of radioactivity, which generates heat in Earth's core, was not accounted for in Kelvin's calculations. The Earth's mantle, though mostly solid, allows heat to move through convection currents, distributing heat more evenly and supporting geological phenomena like plate tectonics.

What was Lord Kelvin's theory about the Earth's temperature?

How did Kelvin attempt to calculate the age of the Earth?

What was the main error in Kelvin's estimation of the Earth's age?

What role does radioactivity play in the Earth's heat?

Explain the concept of convection currents in the Earth's mantle.