Kelvin lowered his prediction to 20 million years based on fresh data on the granite melting point.
<h3>What did Lord Kelvin believe about the Earth?</h3>
The Earth, according to Kelvin's theory, solidified from a molten state in which it was first all at a high temperature that was then maintained at a constant surface temperature.
<h3>How did Lord Kelvin calculate the Earth's age?</h3>
Using temperature gradients, Kelvin computed the age of the Earth and calculated that it was approximately 100 million years old. He was unaware that the Earth's mantle was convecting, which rendered his prediction inaccurate.
<h3>What was Lord Kelvin's theory?</h3>
According to Kelvin's law, heat from a high-temperature energy source cannot completely be transformed into "work." A portion of the heat will be transformed into poor energy and "lost" in the process. This demonstrated that a heat engine cannot be completely efficient.
To learn more about Lord Kelvin's theory visit:
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