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Ocean Tides

Affected by the gravitational pull of the moon and sun, sea levels rise and fall on a daily basis. Ask questions here about high tide, low tide, spring tide and neap tide.

1,277 Questions

How can you tell that high tide is coming in?

You can tell that high tide is coming in when the water level rises to cover more of the shoreline, often reaching higher than normal water marks. Additionally, high tide is typically associated with the water moving closer to structures like piers or docks. You can also check tide charts or use tide prediction apps to know when high tide is expected.

What is a mixed semidiurnal tide?

A mixed semidiurnal tide is a type of tide pattern where two high tides and two low tides occur each day, but with varying heights. This means that the high and low tides are not of equal height, creating a mix of semidiurnal (twice daily) tide characteristics.

What are two factors that determine the density of a water mass?

The answer to determine density is dividing mass by the volume. To find volume measure the area.

Density = mass / volume

same formula is used to determine the density of water mass as well.

after calculations we come to know that density of water is 1000 kgm-3.

kgm-3 ( kilogram mass raise to the power minus 3 ) is the unit of density .

Density of water is a constant quantity.

Where are semidiurnal tides found?

Semidiurnal tides are found in many coastal areas around the world, including parts of the United States (such as the East Coast), Europe, Africa, and Australia. These tides have two high and two low tides of roughly equal height each day.

What is a real world example of a tide?

An example of a real-world tide is the daily cycle of high and low tides in coastal areas, which is caused by the gravitational forces of the moon and sun pulling on the Earth's water. This phenomenon is commonly observed at beaches and harbors around the world.

What causes the Arctic Ocean to have tides?

The tides in the Arctic Ocean are primarily caused by the gravitational pull of the moon and the sun. The water level rises and falls due to the gravitational attraction of these celestial bodies, creating high and low tides. Wind patterns and the shape of the coastline can also influence the tides in the Arctic Ocean.

How does the shape of the shorline affect a tide?

The shape of the coastline affect tides because of resonance. Resonance changes normal tide occilations. (see in the section of resonance, Hydrographic Volume II, Tide and Tidal Stream)

Why do fishermen need to know the tide?

When the tide is high, the water in a port is deeper; this means it is easier to maneuver around shallow areas. At low tide, many obstructions such as sand bars and reefs are exposed, or are close enough to the surface to damage a ship's hull.

When the tide is "flowing" or rising, water moves into a river or harbor, making it easier for ships to enter the port and more difficult for ships to leave. When the tide is "ebbing" or falling, water is flowing OUT of the harbor, making it easier for ships to leave port.

With powered vessels, this isn't particularly important; but for sailing ships, it can be VERY important to leave port when the tide is ebbing, and enter port when the tide is flowing.

In some extreme cases, ships are aground at low tide! The English port of Bristol experiences dramatic tides; in fact, the old saying "ship-shape and Bristol-fashion" refers to having everything put away well enough so that things won't be knocked over when the tide goes out and the ship runs aground - and keels over!

How are the new and full moon phases related to the tides?

The ocean tides are the result of the gravitational attraction toward the moon and the sun. The moon's influence is a little greater than the sun's influence, because the moon is so much closer to the earth. Anything on the side of the earth pointing toward the moon feels a force of attraction toward the moon. Since water flows so easily, it tries to flow toward the moon, and it piles up in that direction. Dry land is a lot stiffer than water, but a "land tide" also exists ... the land actually rises a few inches in the direction of the moon.

What are the safety precautions during high tide?

During high tide, it's important to stay away from the water's edge to avoid being swept away by strong currents or waves. Avoid swimming in the ocean during high tide, as rip currents can be stronger. Be aware of your surroundings, stay off rocks and jetties, and never turn your back to the ocean.

What are the supertitios beliefs about tides?

One common superstitious belief about tides is that they are influenced by the lunar cycle and can affect human emotions or behavior. Some people also believe that certain phases of the tide can bring good or bad luck, depending on the circumstances.

Does every location on earth has two high tides per month?

No, not every location on Earth experiences two high tides per month. The frequency of high tides depends on various factors such as the geographical location, topography, and tidal patterns of the region. Some areas may have more than two high tides per month, while others may have only one high tide or irregular tidal patterns.

What causes tides to move?

the moon and sun pull the water causing tides. spring tides are stronger and happen when the sun and moon are either in the same direction or oposite each other. Neap tides are weaker and happen when the sun and moon are aproximatly on a 90 degree angle.

Why people who lives in coastal area should know about waves and tides?

People in coastal areas should learn about tides and waves in order to predict the best times for using the beach, to prevent accidents, and to stay alert for dangers, such as storm surges

Where is the moon's pull strongest relating to tides?

The moon's pull is strongest on the side of Earth that is facing the moon, creating a high tide. At the same time, on the opposite side of Earth, there is another high tide due to the centrifugal force generated by Earth and moon's orbital motion.

When is high tide caused?

Tides occur when the Moon (and the Sun to a point) is in a specific alignment with Earth. Its gravitational pull on the Earth, though insignificant, pulls free-floating water on the Earth's surface, creating the low and high tides. Spring tides occur when the Sun, Moon, and Earth are on the same imaginary line, accentuating tides. Neap tides occur when they are perpendicular to one another, creating lower high tides and higher low tides.

What phase of the moon produce the highest and lowest tides on earth?

When the Moon is at Full and at Dark (New), tides are strongest. These are called "spring" tides. When the Moon is at First and Last Quarter, the tides are weakest. These are called "neap" tides.

The reason is that the Solar tides are either added to, or subtracted from, the Lunar tides.

Where does a hot spring occur?

A hot spring occurs when groundwater is heated by geothermal energy underground and rises to the surface. This can happen near volcanic areas, where magma heats up the water, or in regions with high geothermal activity.

What high tide mean?

it means that the water is at a high level. the ocean will be closer to you where as a low tide is the opposite and it will be further away

Where do winkles hide when the tide goes out?

Winkles, or small sea snails, often hide in crevices or under rocks when the tide goes out to protect themselves from predators and desiccation. They can also burrow into the sandy or muddy substrate to stay moist and safe until the tide returns.

What tide does rockweed live in?

Rockweed, a type of seaweed, is commonly found growing in the intertidal zone, which is the area that is covered by water during high tide and exposed during low tide. This allows rockweed to thrive in both submerged and exposed conditions as the tide fluctuates.

What are extreme tides called?

Extra high tides are called spring tides and extra low tides are called neap tides

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Spring high tide is a tide that is very high and reaches high up the beach. Spring low tide is a tide that is very low and goes far down the beach. Neap tides are the high and low water tides that range over the beach between the Spring tide marks.

Why do you have high and low tides at the beach?

Due to the gravitational pull on the earth from the moon and the sun. The moon pulls the water from the earth towards it and so does the sun.

Low tides are called Neap tides and are low because the pull from the sun and the moon cancel each other out (it would be much easier to explain using a diagram)

High tides are spring tides and are high because the sun and the moon are alligned, creating a strong force.

Can you live in two watersheds?

There's some ambiguity in the question.

The word "watershed" is used differently in different places. In the United States it usually means "drainage basin" or "catchment". In Europe, it usually means "divide" (as in "Continental Divide"), or the boundary between drainage basins.

I'm assuming you mean the "catchment" usage, since it doesn't make sense to ask if you can live "in" a boundary.

However, you can certainly live ON a boundary, in which case part of your property may be in one drainage basin and the rest in another. In that case, the answer is yes.

Do high tides occur at midnight?

High tides can occur at any time of day or night because they are influenced by various factors like the moon's position and the geography of the area. It is possible for high tides to occur at midnight depending on the tidal patterns in that particular region.