Question

question 4a: was there any evidence that the moon was turning on its axis? explain. click the run time forward button and let time move forward until the sun has set at your position on the moon. the red line should now be just between the bright and dark parts of the moon. question 4b: what is the date now? how much time has passed since sunrise? how does this compare to the amount of sunlight we get on earth even on the longest days? notice that on the red line, \you\ are always facing the earth. click the run time forward button. question 4c: what evidence is there that we on earth always see the same side of the moon?

Explanation:

4a: The Moon's day-night cycle (sunrise to sunset) indicates rotation on its axis, as the Sun's position changes over time.
4b: Without specific simulation data, the Moon's solar day is ~29.5 Earth days, so time since sunrise would be ~14.75 days (half a lunar day), much longer than Earth's longest days (max ~24 hours at equator).
4c: "You" on the red line always face Earth, showing the Moon's rotation period equals its orbital period (synchronous rotation), keeping the same side visible.

Answer:

4a: Yes, the occurrence of sunrise and sunset on the Moon indicates it is turning on its axis. As time moves forward, the Sun sets, showing the Moon rotates to face away from the Sun.
4b: The specific date cannot be determined without simulation start data. Time since sunrise is approximately 14.75 Earth days (half of the Moon's ~29.5-day solar day). This is much longer than Earth's longest days (e.g., ~24 hours at the equator or up to 6 months at the poles, but 14.75 days exceeds typical Earth day lengths).
4c: The evidence is that "you" on the red line are always facing the Earth, demonstrating the Moon's rotation period matches its orbital period (synchronous rotation), so the same side is always visible from Earth.