How long does it take the Earth to rotate on its axis:

Question

BlackTom AI · Accepted Answer

The question asks about how long it takes the Earth to rotate on its axis. To approach this, evaluate each option against the known fact that Earth completes a rotation relative to the Sun (a solar day) in about 24 hours, and a rotation relative to distant stars (a sidereal day) in about 23 hours 56 minutes. 
Option 1: 1 year. This is incorrect, as a year measures orbital period around the Sun, not the spin of the planet on its axis. It confuses two separate celestial cycles.
Option 2: 1 day. This aligns with the definition of a solar day, the time it takes for the Sun to return to the same position in the sky, effectively one full rotation relative to the Sun. It is the commonly cited duration for a day.
Option 3: 1 month. A month is a measurement tied to the Moon’s orbital cycle around Earth (roughly 27 to 31 days), not the Earth's rotation period, so this value does not correspond to the rotation on its axis.
Option 4: 1 week. A week is a time unit defined by human calendars and cultural conventions, not a physical rotation period of the Earth, making this choice incorrect.
In summary, the only option that correctly matches the rotation period relevant to a standard day is the one stating about 1 day, while the others mix different astronomical or calendrical concepts that do not describe Earth's rotation on its axis.

Earth & Environmental Science 2025-26 4.2 Module 2-3 Assessment Honor Lock -S- (60 Minutes ASYNC)

How long does it take the Earth to rotate on its axis:

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