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answ2. The tides are caused by the attraction of gravity.

On the side of the Earth nearest the Moon, the attraction of the Moon lessens the strength of the local perceived gravity field.

On the side of the earth farthest from the Moon, the ocean there sees the gravitational pull of the whole Earth-Moon system, but the effective centre of this system is further away than the real centre of the earth. Thus the gravity field is seen as slightly less and there will be high tides there as well.

When the Sun and the Moon are in alignment with the Earth, (New Moon), we have the strongest gravitational force and the tides are at their maximum height.

When the Sun is on the opposite side of the Earth from the Moon, (Full Moon) then we have a weaker gravitational force, and the high tides are not quite as high as for the New Moon case.

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13y ago
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Semidiurnal means twice-daily. In relation to tides, this means that there are two tidal cycles per day. In other words, during a typical day the tides reach their highest point lowest point twice each day. Some locations only have once daily tide changes, or diurnal tides.

The basic cause of tides is gravity. As the the sun and moon pull at the Earth, the tides bulge in that direction. As we rotate, that location of pull is released, causing a tide.

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Q: What is a semi diurnal tide and how is it caused?
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What are the three main tidal patterns?

The three main tidal patterns are Diurnal, Semi-diurnal, and Mixed Semi-diurnal. If an area has one high tide and one low tide each day it is called Diurnal. If the area has two high tides and two low tides of the same height , it is called Semi-diurnal, if the tides are differing heights it is called mixed Semi-diurnal.


What is difference between semi diurnal mixed and diurnal tides?

Semi-diurnal mixed tides have two high and two low tides per day with different intensities, while diurnal tides have one high and one low tide per day. Semi-diurnal tides are more common in coastal regions, while diurnal tides are more common in inland seas.


How do you classify tides?

Two different ways to classify times are the Diurnal Tide and the Semi-diurnal Tide. A diurnal tide has one episode of high water and one episode of low water each day. A semi-diurnal tide has two episodes of equal high water and two episodes of low equal water each day. They are both also classified as astronomical tides, meaning they are influenced by gravitational actions of the sun, moon and Earth.


What are the three types of tides?

The three types of tides are diurnal tides (one high tide and one low tide each day), semi-diurnal tides (two high tides and two low tides each day), and mixed tides (where there are two high tides and two low tides, but the heights vary).


What is the meaning of diurnal tide?

A diurnal tide is a type of tide characterized by one high tide and one low tide each day, occurring roughly every 24 hours and 50 minutes. This tidal pattern is typically found along coastlines where the moon passes overhead only once in a 24-hour period.


How many low tide and high tide do you have?

There are typically two low tides and two high tides each day. This pattern follows a semi-diurnal tide cycle, which occurs every 24 hours and 50 minutes.


Which solar system object has the most effect on tides?

hey i think its because of the solar system


Classififcation?

Two different ways to classify times are the Diurnal Tide and the Semi-diurnal Tide. A diurnal tide has one episode of high water and one episode of low water each day. A semi-diurnal tide has two episodes of equal high water and two episodes of low equal water each day. They are both also classified as astronomical tides, meaning they are influenced by gravitational actions of the sun, moon and Earth.


When boating on coastal waters if it is high tide is at noon when can you expect the next low tide?

If high tide is at noon, you can expect the next low tide roughly 6 hours later, around 6 PM. Tides typically follow a semi-diurnal pattern with two high tides and two low tides each day, occurring approximately 6 hours apart.


Why does Perth only have one high tide a day and Melbourne have two?

Perth has one high tide a day because it is located on the Indian Ocean, which experiences diurnal tides (one high tide and one low tide per day). Melbourne, on the other hand, is located on the Bass Strait, which has semi-diurnal tides (two high tides and two low tides per day) due to its position between the Pacific and Indian Oceans.


How do semidiurnal and diurnal tides differ?

Semidiurnal tides have two high tides and two low tides of nearly equal height each day, while diurnal tides have one high tide and one low tide per day. Semidiurnal tides are more common globally, while diurnal tides are more common in certain locations.


Why does the Gulf of Mexico have one daily tide on the northern Gulf coast of Florida and two daily tides on the central south coast of the Florida peninsula?

I don't think that's true. If I look at the NOAA tides on line site (see link) there's no dramatic difference between Pensacola and St. Petersburg. South Padre Island looks pretty much the same, too. When you get down to Naples things get weird, and continue to be weird around Key West, but by Virginia Key, the conventional semi-diurnal tide is well established. So the question should really be, "Why does the Gulf of Mexico not have a semi-diurnal tide?"