Multiple choice general knowledge science & technology

The source of energy of the sun is ______.

  1. nuclear fission

  2. chemical reaction

  3. nuclear fusion

  4. photoelectric effect
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The sun's energy comes from nuclear fusion, where hydrogen nuclei combine to form helium in its core. This process releases enormous energy according to E=mc². Fusion requires extremely high temperatures and pressures (15 million °C in the sun's core), unlike fission which splits heavy atoms.

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