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spring tides
The higher "spring" tides occur at the new and full Moon, while the lower "neap" tides occur at the first and third quarter Moons.
A spring tide occurs during the full moon phase of the moon. This is also known as the new moon phase and the moon is located between the earth and the sun.
the phases of the moon don't affect tides. Tides are caused by the moon's gravity, the moon is always at the same distance from Earth. Sun also causes the tides. so if the sun and the moon are directed in the same place at Earth extra high tides occur.
It varies from day to day and from place to place. It is dependant upon where the Moon and Sun are in relationship to the Earth and the specific location. There are tide tables available that will give the times in key locations with directions on how to determine the difference for areas nearby. Most communities will publish the time of high and low tides in the local paper.
The New Moon and Full Moon phases.
b) high,spring.
full
If you mean which of these bodies has the strongest gravitational field then the Sun wins by a very large margin. This is because the strength of a gravitational field is governed by an object's mass and the Sun is the heaviest. After that the Earth is the most massive and finally the moon. So the order is Sun, Earth and Moon.
There are 2 tides a day. The phase of the moon is not responsible for high and low water, but does affect 'by how much'. Some high waters are higher than others and at the same time the tide goes out further at low water. These are known as 'spring' tides and happen when the moon is 'full' or 'new'. So 'springs' and 'neaps' are affected by phase. The tide will still come in and out twice every day.
Full moon has the biggest draw, hence the highest tides. If the moon can lift the ocean, it certainly is lifting the atmosphere thus majorly affecting weather, and it also certainly has a bit of tug on the crust of the Earth thusd having some part to play in earthquakes.
At the quarter moon phase, the gravity of the sun and the moon are working at right angles to each other, partially canceling out their tidal effects. This is when you'll get the highest low tides or lowest high tides, or "neap tides".