Question

why are there two high tides a day about 12 hours apart from each other? earth revolves around the sun once during that time. earth rotates entirely on its axis once during that time. the moon revolves around earth once during that time. the moons orbit is in line with earths orbit twice a day.

Explanation:

Tides are caused mainly by the gravitational pull of the moon on Earth's oceans. As the Earth rotates and the moon orbits Earth, different parts of the Earth experience high - tides. Since the moon orbits Earth approximately once a day (more precisely, about every 24 hours and 50 minutes), there are typically two high - tides a day because different parts of the Earth face the moon and are influenced by its gravitational force at different times.

Answer:

The moon revolves around Earth once during that time.