This tidal friction has slowed the Earth's rotation gradually over the years. Back in the Paleozoic there used to be over 400 days per year. Include information about early peoples ideas as well as our modern thoughts gathered by probes and manned missions. Use some of your new found lunar information to add to the introduction of your Moon-Tide project. In this discovery we will be describing the geometry of the Earth, Moon, and Sun as they gravitationally interact.
People First determine the direction that the Earth rotates.
If you look down on the north pole of our globe which way would it spin. It is easy to figure out relative times around the globe. For every 15 degrees of longitude add or subtract an hour. Start in the position that you have determined to be representative of a Full Moon. As you spin around watch the shadows change on the ping-pong ball.