Multiple choice

The time required for the earth to complete one rotation on its axis is

  1. 23.5 hours

  2. 24 hours

  3. 22 hours

  4. 23 hours
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A solar day - the time from noon to noon - is exactly 24 hours. While Earth's sidereal rotation (one complete turn relative to stars) is about 23 hours 56 minutes, the 24-hour cycle is what we experience as daylight and darkness. Options A, C, and D are not rotation periods.

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