Re: Why are some ice cubes 'harder' than others?

Hello, Sam!!  I'm going to "answer" your question in the form of
a suggestion for an experiment you can do.  My guess, by the way,
is that the "hardness" of the ice has to do with how many small air
bubbles are trapped in the ice.  So, for your experiment, try to
measure the density of the ice and maybe try to quantify the number
of bubbles in each ice cube.  Then come up with a way to grade the
ice cubes for hardness, and see if there is any correlation between
the density and bubbles and the hardness.

I would be interested in hearing any results you obtain.  We could
even post your results to the MadSci archives.

    John Link
    MadSci Admin