A. Yes; it expands as soon as it is more than 42 degrees till it boils, and then it flies off in steam.
Here A B measures the bulk of a portion of water at 42 degrees.
It goes on increasing in bulk to C D, when it boils. It also goes on increasing in bulk to E F, when it freezes.
Q. Why do water-pipes frequently burst in frosty weather?
A. Because the water in them freezes; and as the water expands by frost, it bursts the pipes to make room for its increased volume.
Q. When does water begin to expand from cold?
A. Water (which is wisely ordained by God to be an exception to a very general rule) contracts till it is reduced to 42 degrees, and then it expands till it freezes.
(Water freezes at 32°.)
Q. Why does water expand when it freezes?
A. Because it is converted into solid crystals, which do not fit close, like the particles of water.