What powers the Earth's internal heat engine?

The correct is Radioactive energy.

Key Points

• The heat from radioactive material decay and leftover heat from Earth's formation fuel the planet's internal heat engine.
• Atoms that are radioactive have energy inside them that spontaneously escapes as electromagnetic waves or high-energy subatomic particles.
• Radiation is the term for emissions.
• The Earth naturally contains radioactive material, which contributes to the planet's warmth.
• Cosmic rays also continuously generate radioactive material in the atmosphere.

Additional Information

•  Solar Energy
  • Solar power is generated by the sun.
  • The sun's radiant radiation may be transformed into electrical or thermal energy, making it the most abundant energy source on Earth.
  • Solar energy is used for a variety of things, including lighting and heating our homes, places of business, and other facilities.
  • Solar energy is a renewable resource and, as such, is essential to the development of clean energy.
• Volcanoes
  • An opening in the crust of a planet or moon known as a volcano allows molten rock, heated gases, and other things to erupt.
  • As layers of rock and ash accumulate from numerous eruptions, volcanoes frequently take the form of a hill or mountain.
  • There are three types of volcanoes: active, dormant, and extinct.
    • Active volcanoes have recently erupted; they are likely to do so once more.
    • Volcanoes that are dormant have not erupted in a very long time yet could do so in the future.
    • It seems unlikely that extinct volcanoes will erupt in the near future.
• Tides
  • Tides are the rise and decrease in sea levels brought on by the combined effects of the Moon's (and the Sun's, to a much lesser extent) gravitational pulls, as well as by the Earth and Moon orbiting one another.
  • To determine the anticipated times and amplitude for any location, tide tables can be employed (or "tidal range").