Is Ice really lighter than water?
356807
The answer lies in the question: if something is less dense, that means its mass is spread out over a larger volume. To say that ice has 9/10 the density of liquid water is to say that its volume has increased by 1/10:\nIf you take 1 pint of water and set it aside, and take another pint of water and freeze it, you will find that the water expanded in the latter by 1/10, without losing any mass or weight. It does not become lighter, it becomes more spread out in area and volume. The same principle is applied when you have snowshoes on in deep snow: your weight is more spread out on the snow, therefore you do not sink.
858544
Because water expands when it freezes..\nTherefore ice is of larger volume than the water it originated from\ntherefore it is less dense..
1142972
In short, ice float in water because it is less dense.\n\nDensity = mass / volume\n\nFor a more thorough explanation, one needs to look at what happens when liquid water freezes into solid water (ice).\nAs the water freezes and becomes a solid, it expands.  The volume of a given mass of water becomes larger, therefore the density decreases.  Without going into the effects of buoyancy to explain "why" less dense things float (the weight of the fluid they displace is greater than the weight of the object), just accept that they do.\n\nTo be even more thorough,\nWater expands when it freezes because of the strong, "Hydrogen bonding", intermolecular forces which exist between the water molecules in the liquid/solid.\nWhen water is a liquid, the molecules have much more freedom to move around and rotate any way they please, but when the water freezes into a solid, the molecules have significantly less energy (thus less freedom to move around) and try to take on the most stable/low energy state they can...which happens to be in a lattice structure which has a higher volume that when the molecules were in the liquid state.  So it is because of the Hydrogen bonding present between the water molecules that solid ice float in liquid water.
204871
The answer is D.  Since ice forms a complex crystalline structure instead of some amorphous solid, it is one of the only elements whose solid form is less dense than its liquid form.  This is why ice floats.  This is important biologically.  If ice did not float, it would destroy the ecosystems underwater every winter.
949671
Does it have to have air in it?? Hydrogen gas is less dense than air, so that would make it lighter.
685755
Ice water.  Ice is the solid phase and the water is the liquid phase.
402591
The short answer is an ice cube, but that is not the whole story.  Water reaches its maximum density at about 4 degrees centigrade at which point it is still liquid.  The density drops at temperatures below 4 degrees, ice forms at 0 degrees and the density continues to drop as things get cooler.  The density also drops as water is heated.\n\nSo at 60 degrees centigrade, liquid water has a density of about 983kg/m3 while at -10 degrees, ice has a density of 998kg/m3.  This means the ice more dense than the water, so if you drop an ice cube at -10 into a cup of water at 60, the ice cube will sink (if you can stop it from melting or cooling the water).\n\nAssuming your teacher asked you this, you can put their nose out of joint by telling them ice is more dense than water and when they contradict you ask them to calculate the density at the temperatures I gave and tell them to ask more precise questions next time.
1096857
I think it would be easier for ice to return to liquid form since they are more "condense" than the steam which can be any where in space.\n\nbtw lol @ vegasbill1963
312206
Water continues to become more dense as it cools until just above the freezing point.  I can't remember the exact temperature off-hand, but I believe it is very near 33.5 to 34 degrees Fahrenheit.  \n\nBelow that water begins to expand and once it has frozen, its volume increases approximately 10%...that's why ice floats...less dense than the water it came from!  Cool, huh?
474395
one generally uses pure water as a base point. other liquids are typically refrenced as lighter or heavier than water.
530819
Com'on people, you should know this.\n\nPut in the ice cube slowly, some water spills out, most of the ice is under water (about 92% due to lower density).  Ice melts in time and the water level drops very slightly due to: 1) water temperature drops a bit (higher density, lower volume), 2)evaporation.
449704
Water is water. The density of ice water is 1000 kg/m^3. It isn't floating is it? Then it must not be below 1000.
80416
Answer of vikram is correct, but, insted of the phrase `Ddensity increases' the phrase `density decreases' is suitable.As density of ice is less than that of water, it floates.Anomalous expansion of water is considered as the `boon of nature'. If the nature has not gifted this property to water, ice goes on settling in the bottom of the sea.Light and heat of the sun does not reach the bottom of the sea hence it does not melt. By this we can easily understand that no aquatic animal at the bottem of the sea can survive.
855462
ice has lower density, so it will either have larger volume or lower mass/weight than water.
1047463
It will be exactly the same -- soft drinks are mostly water.  The ice cube floats in water, displacing exactly the same mass of water (and thus volume of water) as it will become when completely melted.
865673
For similar reasons why ice bergs float - it has to do with buoyancy and and density and displacement of water and what happens to the molecules when water freezes.  It is a bit difficult to explain it in sixth grade terms.  These sites may help you.
902687
The density of pure water is 1.0\nThe density of ice is .92 (ice expands when it freezes, so the density drops)\nThe density of sea water is 1.025 (sea water is denser then pure water because it is salty).\n\nAn ice cube floating is a glass of water is 92% submerged (compare their densities.)\n\nAn ice berg floating in sea water is 90% submerged (.92/1.025)