Question

1. tides occur approximately every ______ hours. 6 8.5 10 12.5

Explanation:

Tides are mainly caused by the gravitational pull of the moon on the Earth's oceans. There are generally two high - tides and two low - tides each day. A day is approximately 24 hours. So the time interval between consecutive high - tides or low - tides is about 24/2 = 12 hours. The closest value to this in the options is 12.5 hours.

Answer:

D. 12.5