Question

which of these is a direct result of earths rotation?
a one month is 29 days long.
b one day is 24 hours long.
c one year is 12 months long.
d one week is 7 days long.

Explanation:

• Option a: A month's length (including 29 - day lunar months) is related to the Moon's orbit around Earth, not Earth's rotation.
• Option b: Earth's rotation on its axis takes about 24 hours, which defines a day. This is a direct result of Earth's rotation.
• Option c: A year (12 months) is due to Earth's revolution around the Sun, not rotation.
• Option d: A week being 7 days is a human - defined time unit, not related to Earth's rotation.

Answer:

b. One day is 24 hours long.