Professor Blue

Serious about science since….first grade

The story of water: moving, changing but not going away!

Just like being stuck with your pest of a brother or sis­ter, you can’t get away from water.  But you should be glad you can’t.  On both accounts.

You see water in a lake, or a stream, or river — you get the idea.  Humans, ani­mals and plants drink the water up.

a fly drinks water off of a leaf

What we don’t drink evap­o­rates.  Or it freezes.  Some of it melts.  It goes up to the clouds that hold water until they release the water and then water has returned. You might think to your­self, “Not as good as grape juice” … until you’re really thirsty and there’s a fresh glass of water nearby.  That stuff sit­ting in the glass?  It’s always leav­ing and com­ing back.  You might not think about it that way.

Sci­ence with Me explains,

Water can change state from liq­uid to vapour to ice at dif­fer­ent places on the water cycle. How­ever, the bal­ance (or amount) of water always stays the same. So the water in your glass is very, very, very old indeed! (but it still tastes good). If you think of a per­son who lived hun­dreds of years ago, well the water in your glass was on the Earth then too! Maybe they even drank the same water as you…ewwwww!!

Sure, it might take a long time for the water in Lake Char­gog­g­a­gog­gman­chaug­g­a­gog­gchaubuna­gunga­maugg to evap­o­rate, tran­spi­rate, con­den­sate, pre­cip­i­tate, hes­i­tate, stare at Nate.

And sure, it might be a long time before your brother, both­er­ing you with his pile of legos, can build a robot that will pour some­thing into a glass for you.  It might be some time later when your sis­ter, buzzing all the time at the game of Oper­a­tion, can safely per­form the Heim­lich maneu­ver on you because you drank too fast and started chok­ing.  Then it’s a good thing they didn’t go away.  Maybe it would help to con­sider your brother or sis­ter as a slow mov­ing ice­berg, a frozen body of water.  That’s not my sis­ter.  That’s just vapor.

posted by professor blue in General,Water and have Comments (2)
© Professor Blue 2010