From: utzoo!decvax!decwrl!sun!megatest!fortune!hpda!hplabs!sri-unix!mclean@NRL-CSS
Newsgroups: net.physics
Title: ice in water
Article-I.D.: sri-arpa.845
Posted: Thu Apr  7 06:32:39 1983
Received: Fri Apr  8 01:30:29 1983

From:  John McLean <mclean@NRL-CSS>


Expanding on Phil Ngai's answer, the ice floats since water is one of the
few substances that expands when it freezes.  This is due to hydrogen
bonding and is what makes it possible to ice skate.

john