water does not have colour.so why is the ocean blue colour?
337864
reflection of the sky
806918
Where does it appear blue? Never heard of that!
707257
There are several theories:\n\n1. Blue wavelengths are absorbed the least by the deep ocean water and are scattered and reflected back to the observer’s eye \n\n2. Particles in the water may help to reflect blue light \n\n3. The ocean reflects the blue sky
1056723
The sky is blue due to the way that light is bent, it's called Rayleigh Scattering.  Sunlight is white and white light consists of all colors but when it hits our atmosphere the light is broken up into it's component colors by the particles in the atmosphere.  The shortest wavelengths don't make it through the particles but the blue light does - hence the sky appears blue when in fact it has no color ro it (it is after all, nothing but air and water).\n\nAs others have said - grass is green because of chlorophyll - the chemical in all plants and it just happens to be green.
192425
there are two reasons for the color of the sea:\n\nA. the sea reflects the sky.\nyou have probably noticed that the sea is not very blue-looking when the sky is overcast. water reflects and scatters the light that strikes it; this is shown by the fact that you can see your reflection in puddles. when the sky is brilliant blue, the sea is also, because it reflects the blue of the sky. \n\nB. blue light is more easily bent, or refracted, than red light. thus, light refracted back from the surface of the sea appears blue. furthermore, when you are underwater the water around you appears blue because more blue light is scattered back to your eye than red light.
278514
The sky is colourless. It is black. Scientifically at least.\n\nThe sun's rays of light reflect off water and those coloured rays are reflected onto the sky. That is why the sky looks blue. \n\nWhen it changes to other colours it depends on how much light the sun gives off and what colour that makes the surface of the water. That is also why, at night, when the sun is gone, the sky is black.
313855
the water, earth and moon are always moving......why is some water clear and some murky?  there are so many factors, bacteria in water don't live in warm water, so in tropical places the water is clear, on the other hand, places like east or west coast usa are colder so the water has a higher degree of pollution or looks more "murky"
627643
Oceans appear blue because the absorption rate of sunlight varies with the wavelength of the light's spectrum.\nLonger wavelengths, i.e. the red colors of the spectrum are absorbed "faster"  than short wavelengths, which represent the BLUE of the light's spectrum. As a SCUBA diver you'll experience that the world around you turns more and more blue, the deeper you dive...
917666
Why is the sky blue?\n\nhttp://math.ucr.edu/home/baez/physics/General/BlueSky/blue_sky.html\n\nhttp://www.sciencemadesimple.com/sky_blue.html\n\nGood luck.\n\nKevin, Liverpool, England.
1015359
using simple physics\n\nThe blue color of the sky is due to Rayleigh scattering. As light moves through the atmosphere, most of the longer wavelengths pass straight through. Little of the red, orange and yellow light is affected by the air.\n\nthe grass is green because the other colors are absorbed and only green is reflected. Grass and most other plants are green because they contain a pigment known as chlorophyll.\n\nSun isn't really yellow. The color yellow is a purely human interpretation of a collection of radiation that hits the retinae of our eyes and gets processed by our visual cortex.
1154689
It's not because of light relfecting off the ocean, and it's not from bending of light.\n\nIt's from selective scattering of light called Rayleigh scattering.\nAir molecules are small which makes them better at scattering small wavelengths, such as blue and violets.  As the sunlight strikes air molecule after air molecule, what reaches our eyes is the blue light that was scattered away.
994169
Is water wet? Is the sky blue?\n\nYEP!
906858
The most obvious answer is that it reflects the sky since you can see reflections of clouds also. But reflection is only part of the answer. \n\nIt is true that part of the light you see is a surface reflection of sky light. The amount of this sort of reflection, though, depends on a number of things such as your viewing angle. On the other hand, much of the color you see comes from the water's depths. \n\nWhite sunlight contains all colors. Water absorbs some of these colors more than others. But you need a lot of water to notice this effect - which is why water cupped in your hand has no color at all. In a large body of water though, the water molecules quickly absorb red light, but they don't absorb blue light nearly as well. So in this case, more blue light is transmitted through the water. It's actually the same principle behind why the sky is blue. \n\nThe blue effect is often increased because ocean and lake water usually contains floating particles of dirt, and dead and living plants and animals. They help reflect the blue light back upward - so that the lake or ocean looks blue. The blue-green of tropical waters is due entirely to absorption of red light rather then suspension of particles. It's a different blue than the blue of the oceans off the northeast coast, whose blue is caused by suspended particles and plants. \n\nSo now we know why some bodies of water appear blue, but what about the other water colors, like gray, brown and black? Different colors can be produced by specific things suspended in the water. Mud acts in the opposite way from water -- it reflects red light more than blue. So muddy water looks brown. Since rivers are big transporters of mud, they usually appear brown. Peat dissolved in water absorbs almost all the light that touches it - so a lake full of peat may look black. The ocean often usually looks gray on a stormy day. Partly, that's reflected gray sky - but it's also because clouds filter out a lot of the sun's red light before it ever reaches the water. \n\nColors of water can be pretty distinctive. The Black Sea is so named because of its color, a very dark almost black color. In this case, it's the almost constant fog over the Black Sea that absorbs incoming light and makes the sea appear black. It was enough to make the Turks and many other sailors want to avoid what they saw as an evil looking sea!
1150937
The ocean appear blue because of its depth ... once visible light hits the ocean and penetrates the surface, all colors of the spectrum are absorbed and blue light waves are reflected back ... hence, blue.\n\nWater, in glass, is not reflective or deep enough to reflect any colors. This is why if you took some blue sea water and placed it in a glass, it would look clear ... murky, but clear.
1089541
it is blue when exposed to oxygen but otherwise colorless
19151
Hey there Jenna!\n\nThe sky is blue on Earth.. why?  This is because of an effect called "Rayleigh scattering".  If you would like to learn more about Raleigh Scattering, I know a pretty neat site: http://www.sciencemadesimple.com/sky_blue.html\n\nHave a great day! :O)
938185
clouds, the sky, and the sea!!!!! all are beutiful things that are blue or blue related!!!! and for 2010 (my year as well) how about clouds or water in number shapes or something kewl like that?