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It doesn't... always! First of all, water will only remain flat when it is completely undisturbed. In a lake or the ocean, the wind creates waves on the surface. In a river, the water is flowing downhill, and the surface of the water is certainly not flat.
However, generally we think of water as being flat. That's not really true either. The oceans are certainly not flat -- they are curved! The oceans are on the surface of the Earth, which is a very big sphere. So while the ocean looks flat to us, it is simply because we don't have enough perspective to see that they are curved... but they are! Think about a globe and you can easily see that the oceans are very curved.
However, all this aside, if you have a glass of water, and let it sit undisturbed, the water level is flat. This is because the pull of gravity is equal across the face of the water. The water molecules are free to move throughout the liquid, and the gravity affects each water molecule equally, pulling them all down the same. That is why the water level stays flat in a glass.
The reason the oceans are curved is in fact the same reason. The pull of gravity can be approximated as coming from the center of the Earth. So if you are on one side of the Earth, the pull of gravity is in exactly the opposite direction as if you were on the other side (some people like to think of Australians as being upside down, which is of course ridiculous, but that's that same idea). Because gravity is pulling the water molecules equally towards the center of the Earth, the surface of the water is the surface of a sphere, which is of course, curved.
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Do organisms always stay in the same level explain the answer?
No, because even though humans are placed on a lower tropic level than lions, sharks, wolves, etc. they still eat organisms like those. Humans eat shark and other meat from organisms higher than them on the tropic level pyramid.
A piece of ice is dropped in a beaker containing kerosene when ice melts level of kerosene will?
As kerosene is less dense than water so level of kerosene will fall
According to Newton's First Law what will an object in straight-line motion tend to do?
It will remain in straight-line motion at constant speed until acted on by anexternal force. Moreover, it'll not only tend to do that ... it'll actually do it.
Why does water seek to get to a lower level?
Yes. Take a short piece of clear hose and fill it with water. Lift one end higher than the other and watch the water level in the hose. It will stay the same on both sides.
What is an orbit and why do objects stay in them?
Objects in space go around other objects, in elipses. They stay there because of the forc of gravity of the central object. Without it, they would go away, in a straight line.Objects in space go around other objects, in elipses. They stay there because of the forc of gravity of the central object. Without it, they would go away, in a straight line.Objects in space go around other objects, in elipses. They stay there because of the forc of gravity of the central object. Without it, they would go away, in a straight line.Objects in space go around other objects, in elipses. They stay there because of the forc of gravity of the central object. Without it, they would go away, in a straight line.
