¿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 analogy did Lord Kelvin use to describe the cooling of the Earth?

• A boiling kettle

• A roasted potato

• A melting ice cube

• A burning candle

Why was Lord Kelvin's estimate of the Earth's age incorrect?

• He did not account for the heat from radioactive decay

• He used inaccurate temperature measurements

• He underestimated the size of the Earth

• He assumed the Earth was flat

What is the primary reason Kelvin's calculations were not significantly improved by accounting for radioactivity?

• Radioactivity only affects the Earth's surface

• Radioactivity was not present in the Earth's core

• Radioactivity moves heat too slowly through solid rock

• Radioactivity was overestimated in his calculations

What geological phenomena are influenced by the convection currents in the Earth's mantle?

• Hurricanes

• Tsunamis

• Volcanoes and plate tectonics

• Earthquakes

How do convection currents affect the distribution of heat within the Earth?

• They prevent heat from reaching the crust

• They cool the Earth's surface rapidly

• They evenly distribute heat across the planet

• They trap heat in the core