The Sun produces most of its energy by_____________?
Correct answer: D. Nuclear fusion
- A. None of these
- B. nuclear fission
- C. Burning hydrogen
- D. Nuclear fusion
Explanation
The Sun's core produces energy through nuclear fusion, mainly joining hydrogen nuclei to form helium and releasing energy. This is not ordinary burning or nuclear fission.
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Astronomy covers the structure and motions of the solar system, planets, satellites, comets, asteroids and meteoroids, together with gravity, eclipses, seasons and phases of the Moon. It also introduces stars, galaxies, nebulae, black holes, space telescopes and satellites, while distinguishing rotation from revolution and meteors from meteorites.
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