what causes tides and what are the effects of the tidal forces and how bulges are formed?

Question

compassionate · Answer

Tides are caused by mass, particularly the mass of the moon. The moon also pushes and pulls other things, such as volcanic activity and tsunamis. 

Borrowing from Answers.Yahoo: 

What you might not realize is the water also bulges on the side OPPOSITE the moon. 
That is evidenced by the fact that high tides are about 12 hours apart not about 24. 
If you think of the Earth/Moon system as one system orbiting the sun, you will notice that even though the Earth is so much heavier the Moon is heavy enough that WHOLE system wobbles around in its path, spinning about the center of gravity of the system. This leads to centrifugal forces on the water. Away from the center of the mass of the Earth/Moon system on the side away from the Moon and attraction to the Moon on the side toward the Moon.

rane · Answer

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