Read carefully and choose the letter of your answer. 16. The apparent changes in the moon is called A. an orbit D. a satellite D. 29 2 C. 24 17. About how many days does it take the moon to go through its cycle ? B. 10 A. 5 18. When the part of the moon that you can see is slowly getting bigger or growing, it is C. Waning D. Waxing B. New A. Full 19. When the part of the moon that you can see appears to be shrinking or decreasing. It is- B. New D. Waxing C. Waning A. Full 20. The only natural satellite that Earth has. B. mountain A. moon C. star D. sun​