The tides are the result of the moon exerting its gravitational force on the ocean and bulging it both toward and away from the moon. The tide is higher, the ocean is higher, at the location closest to the moon and on the opposite side of the Earth.
As the Earth rotates, the position relative to the moon changes, so the bulge moves. At any one location the sea level goes up and goes down as the bulge passes that location. Every six hours the tide goes from high to low and high to low again. Over 24 hours you typically see two high tides and two low tides.
The length of Shanghai is 676 kilometers or 420 mliles
Answer:
Paleozoic
Explanation:
The first insect fossils are dated to the Devonian, but because of the development of the genetics, the scientists have been able to trace the appearance of the first insects in the Ordovician. The insects originated from the crustaceans. Initially they were walking on land, but they hadn't developed wings. The wings came to develop in some insects in the Devonian, and since than it has gradually became one of their trademark features. It is interesting that the first insects actually appeared at the same time with the first terrestrial plants, and also that they are the first organisms to develop wings and be able to fly.
The answer is Bahrain and Kuwait, both sources provide some evidence.
"https://en.wikipedia.org/wiki/History_of_Bahrain"
"https://en.wikipedia.org/wiki/Sheikhdom_of_Kuwait"