2007-02-11 14:18:24 · 5 answers · asked by ................................ 2 in Science & Mathematics ➔ Physics
remove all the air from water by
boiling it. let it cool. freeze it. you'll
get ice that is clear...like you get at
some ice machines and restaurants.
it still floats. try it. it is neat if you want
to get some clear ice.
because of the uniquely strong hydrogen
bonding in water, liquid water is actually
more dense than the solid crystalline water, ice.
water is special this way. life on earth would
be very different if entire ponds froze each winter
instead of being insulated from the outside by
a layer of ice floating at the top. it is a very cool
and important phenomenon.
liquid water reaches a maximum at around 4 C and
then expands slightly as it nears the freezing point
(at atmospheric pressure) of 0 C.
2007-02-11 14:54:09 · answer #1 · answered by farmer 4 · 0⤊ 0⤋
When heated above or, cooled below 4°C, water expands.
At 4°C, water is at its maximum density.
Ice when formed is also expanding as it crystallises and the molecules move further apart. The density of ice is therefore less than that of water at 4°C.
Ice will float.
2007-02-13 12:03:00 · answer #2 · answered by Norrie 7 · 0⤊ 0⤋
Wild guess, take a close look at ice. There is AIR in it. Something tells me air bubbles form as they rise and can not exscape they sort of bump into an ice ceiling. Then that freezes a little deeper and it continues as each sublayer forms until the ice also appears different color from the water also. Yep, if I were guessing the air bubbles did it. (Even in ice cubes in a tray if you look at them you can see)
2007-02-11 14:29:40 · answer #3 · answered by chattanooga chip 3 · 0⤊ 1⤋
Ice has a lower density than water has.
2007-02-11 14:23:02 · answer #4 · answered by ecolink 7 · 0⤊ 1⤋
what water freezes (into ice) it traps air between the molecules. this makes it less dense than water as a liquid, so it floats
2007-02-11 14:25:54 · answer #5 · answered by mommajordan 1 · 1⤊ 2⤋