2007-02-17 04:58:02 · 15 answers · asked by karen 1 in Science & Mathematics ➔ Earth Sciences & Geology
The earth is surrounded by water. Almost 75% of earth's surface is covered by water, so they say. Like all other things water is also attracted towards the center of the earth and being liquid it always wants to flow from a high point to a low point till it reaches a state of equilibrium in a calm sea.
In scientific terms mean sea level is established at 760 mm of mercury or approximately 30 inches of mercury. This is known as the equivalent of one atmospheric barometric pressure.
Anything above or below is an indication of change in weather conditions.
2007-02-17 15:11:27 · answer #1 · answered by Anonymous · 0⤊ 0⤋
You are not correct. Strictly speaking the level of water is not same everywhere. Even averaging the tide level differences, the sea level varies. That is why we call the Average Mean Sea level so, with average coming twice in the term.
2007-02-17 05:29:07 · answer #2 · answered by saudipta c 5 · 1⤊ 0⤋
Why do all Seas in the world have same level?
They don't...Moon is always changing the level.
2007-02-17 10:35:54 · answer #3 · answered by kural_akhi 1 · 0⤊ 0⤋
Um, they don't.
Winds tides and current pile the oceans up in funny ways. The run off water from the continents make a difference also. The result of this is seen as the constant currents flowing through many straits and around the places like the North West Passage, the Bering Straits between Siberia and Alaska and around the southern tips of Africa or South America.
2007-02-17 05:18:02 · answer #4 · answered by U-98 6 · 1⤊ 0⤋
they do not.
sea levels are affected by the tide for one. so the seas on the side of the world the moon is on are higher than the seas on the other side of the world.
the second exception are seas that are close in by land. the black sea (near turkey) is one of these, the sealevel cannot drop to much here because the outflow of water is severily limitid because of the size of the strate that connects it to the mediteranian sea.
2007-02-21 03:07:02 · answer #5 · answered by vikash r 1 · 0⤊ 0⤋
all connected seas do (which includes all the oceans and many seas)
an inland sea that is not connected to the ocean may have a different level than ocean level (for instance the Dead Sea or the Great Salt Lake)
2007-02-17 05:06:19 · answer #6 · answered by anonacoup 7 · 0⤊ 0⤋
they do not.
sea levels are affected by the tide for one. so the seas on the side of the world the moon is on are higher than the seas on the other side of the world.
the second exception are seas that are close in by land. the black sea (near turkey) is one of these, the sealevel cannot drop to much here because the outflow of water is severily limitid because of the size of the strate that connects it to the mediteranian sea.
2007-02-17 05:07:48 · answer #7 · answered by mrzwink 7 · 1⤊ 0⤋
water moves from high level area to low level area .
this is the reason why the upper surface looks same level but the depth below the see differs because earth surface will not be plain
2007-02-17 20:18:02 · answer #8 · answered by praveen kumar 1 · 0⤊ 0⤋
Because water seeks its own level. If it is attached to another body of water, the 2 will drain into one another and level off.
2007-02-17 05:04:18 · answer #9 · answered by zebj25 6 · 0⤊ 0⤋
because if any sea changes level then u wouldnt be able to SEE SEA hence for a sea to remain see it has to see it does not change levels.
so that all of them remain sea
2007-02-17 05:40:58 · answer #10 · answered by sachin cool 2 · 0⤊ 0⤋