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In very simplistic terms, as the moon passes over the earth the moon's gravity, pulls on the Earth below. The moon's gravity is too weak to move anything solid and small, but when the Moon's small amount of gravity is exercised over a large area such as an ocean, then, as the water moves easily, the moon's gravity has a noticeable effect. So, as the moon pulls on the surface of the ocean, it moves that bit of the surface of the ocean, slightly closer to the moon. This causes a rise in the level of the ocean at that point, which means that along the shoreline, the water recedes (you can test this with a bucket full of water in a basin full of water. If you raise up the bucket of water as if the water in the bucket was being pulled up by the moon, you will see the water level in the basin will drop i.e. the tide goes out). Once the moon passes the ocean, the water drops back down again and so the tide along the shoreline floods back in. If there is no gently sloping beach where we can see the tide slowly going out, then coming back in again and we are instead watching from say a walled harbour, all we will see is that the tide goes down low, then rises high up the harbour wall. Hope this helps - KENN JOYCE
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∙ 15y ago
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Is the size of all high tides the same?
Tides are the rise and fall of the sea level caused by the combined effects of the gravitational forces exerted by the Moon and the Sun and the rotation of the Earth. The heights of tides vary from seasons to seasons. So no, they are not all the same.
What do you call the cyclical rise and fall of sea level is called?
The periodic fluctuation of the sea is called tides.
What is and area where rivers rise and fall with ocean tides?
an area where rivers rise and fall with ocean tides
How often do tides rise and fall?
At any give point, the time between High tide and Low tide has a mean time of 6 hrs 22 mins. and a few seconds. So in any 24 hour period ( midnight to midnight), there will be two high tides and one low tide, or one high tide and two low tides.
What are two high tides and two low tides a day called?
High tides, low tides, spring tides (which are maximum high tides) and neap tides (which are the lowest of low tides).
How does sea level rise?
Sea levels rise with the tides.
Daily rise and fall of the ocean waters?
It is called the tide, or tides.
What is the term for the daily rise and fall of the ocean waters?
Tides- there is high tide or low tide and it changes throughout the day.
Which parts of earth experience high tides?
Any land that borders the sea experiences high and low tides. The height of the rise and fall varies depending on features such as narrow channels, deep bays, river outflows, and the strength of the wind.
What is a high and low tide?
high tides are high water level they are called spring tides and low tides are low water level they are called neap tides. high tides and low tides occur when the sun, earth and the moon are inline. during new moon there are high tides at west and east and low tides at north and west, because the direction which the moon is facing that direction will have a high tide.
The periodic daily rise and fall of ocean water?
The cyclical rise or fall of the waters of the ocean is called tide. The tides are caused by the attraction of gravities of the moon, sun, and Earth
How many high tides in a week?
There are 14 high tides.
