Multiple choice

The life span of a star depends upon the amount of ______ it had at its birth and its consumption rate.

  1. helium

  2. deuterium

  3. hydrogen

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

A star's lifespan is determined by its initial mass (which determines how much hydrogen fuel it has) and its rate of consuming that fuel through nuclear fusion. More massive stars burn through their hydrogen much faster despite having more of it, leading to shorter lifespans.

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