dry ice and plant growth.

[darkshadow]

watch the mist on dry ice it rises

[U_Wrang]

Carbon's atomic mass is 12.011.  Oxygen's is 15.9994, therefore the atomic mass of a single molecule of CO² is 12.011 + (2 x 15.9994) = 43.999.
Compare this to a molecule of H²O; hydrogen's atomic mass is 1.00794, therefore water has an atomic mass of (2 x 1.00794) + 15.994 = 18.00988.
Ever notice that a chunk of dry ice sinks to the bottom of a bowl of water?  'Nuff said, however, here's an interesting read:
http://vulcan.wr.usgs.gov/Glossary/Lakes/description_volcanic_lakes_gas_release.html
 

[lightbearer]

don't remarks like that get your genius+ rating revoked? lol

[JustAnotherRegularGuy]

Where is the [Genius -] link? 

JARG

[Plasticman]

what the hell is U wrang talking about.

[U_Wrang]

Here's another bit of Genius- (from basic chemistry & physics).... if CO² is heavier than water, why does gas bubble up off it from the chunk that sinks below the surface of water?

30 seconds, players!  It's PHYSICS JEOPARDY with Alex WutTheHeck!
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0     The Answer:
Because it vaporizes (it's boiling point) at a much lower temperature than water.  Water in it's liquid state is hot enough to make dry ice BOIL off into it's vapor state. 

[U_Wrang]

dam. my edumacation came in handy. doh. I offended the three stooges.