The movement of the moon and the occurrence of the tide and the ebb phenomenon
At night , When you look at the sky , You see the Moon , It is the satellite of the Earth . It is a dark body , But it seems bright because it reflects the sunlight which falls on its surface .
The Moon’s rotation around the Earth
The Moon rotates around the Earth in a circular path every 28 days . The Moon appears in the lunar month ( The Moslem calendar ) in different phases .
When the Moon rotates around the Earth , The Moon area that reflects the sunlight changes to form the phases of the Moon .
So , The rotation of the Moon around the Earth causes the occurrence of the Moon phases during the lunar month .
We notice that the Moon phases begin with crescent , half Moon ( half of the Moon is shiny ) , full Moon , then its other part becomes shiny , then changes into crescent .
|The Moon’s rotation around the Earth is every 28 days .|
The solar year equals 365 and quarter days , but the lunar year equals 354 days .
What is the reason that makes the Moon rotates around the Earth in a certain circular orbit ?
The tide and the ebb phenomenon
The tide is the rise of the water level in the water surfaces to cover the seashores , The maximum rising of the water level ( tide ) is in the half of the lunar month ( at the full moon phase ) , The ebb is the return back of the water to its normal level after the tide .
The benefits of the tide and the ebb
They clean the coasts as during the tide and the ebb , the water of the seas carries the wastes from the coasts to the bottom of the sea , where they are settled .
The water currents resulted from the tide and the ebb help the ships and the boats to move through the shallow water paths .
The bad effects of the tide and the ebb phenomenon
It causes some bad effects such as decaying of the beaches .