Approximately how many days does it take the Moon to revolve around Earth?
A.
27.3
B.
29.5
C.
30.1
D.
35.6
A. 27.3
The correct answer is A. 27.3 days.
To determine the approximate number of days it takes for the Moon to revolve around the Earth, we need to understand that the Moon's orbital period is measured in terms of synodic months.
A synodic month is the time it takes for the Moon to complete a full cycle of phases, such as from full moon to full moon. It is slightly longer than the Moon's orbital period because the Earth is also moving around the Sun during this time.
Now, let's look at the options:
A. 27.3 days: This is close to the average orbital period of the Moon, but it is not accurate for the synodic month.
B. 29.5 days: This is the approximate duration of a synodic month, which means it is the time it takes for the Moon to complete a full cycle of phases. This is the correct answer.
C. 30.1 days: This is slightly longer than the average synodic month and is not the most accurate option.
D. 35.6 days: This is longer than the average synodic month and is not the correct answer.
Therefore, the approximate number of days it takes for the Moon to revolve around the Earth is B. 29.5 days.