Question : What powers the Earth's internal heat engine?
Option 1: Solar Energy
Option 2: Volcanoes
Option 3: Radioactive energy
Option 4: Tides
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Correct Answer: Radioactive energy
Solution : The correct answer is Radioactive energy.
The planet's internal heat engine is fuelled by residual heat from Earth's origin as well as heat from radioactive material decay. Radioactive atoms have energy that they spontaneously release as high-energy subatomic particles or electromagnetic waves.
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