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In about how many days does the moon move around the earth?

  • A.30 days
  • B.29 days
  • C.28 days
  • D.27 days

Answer: D

The moon moves around the earth in about 27 days.

The moon completes one revolution around the earth in about 27 days (27.3 days measured against the stars). It takes the same time to spin once on its axis, which is why we always see the same side of the moon from the earth.

The other figures are traps. About 29½ days is the time from one new moon to the next, which is longer because the earth has moved along its orbit around the sun in the meantime; 29 and 30 days come from that cycle or from the calendar month, and 28 days matches neither period. The question asks how long the moon takes to go around the earth, which is about 27 days.

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