9. How many days it takes to make one orbit of the Earth? 10. Since we measure a month (Moonth) as the time for one Moon orbit around the Earth, how many months would there be in a year? How did you calculate that? 11. Reset the Earth and Moon mass to the normal value and hit play again. The force of gravity always operates on both objects. Although the Moon does most of the moving do you notice a slight motion of the Earth too? Describe it briey. 12. What effect does this have on the oceans on the surface of the Earth? Part 4: Choose the Sun, Earth, and Moon system to start as shown below. Check the \"path" box and the \"grid box" and select gravity \"on"