Stuck in someone else's frames? break free!

HomeScience HomeGases Home

Animals HomeAstronomy HomeAtoms HomeEcology HomeLiquids HomeMeteorology HomeMicroorganisms HomeOceanography HomePlants HomeSolids Home


We'll do still another trick with air pressure, and maybe, someday, we'll find out what purpose this kind of a trick serves. [We have seen that all the fun stuff we've done so far has a real purpose.]

Invert a bottle or jar over a burning candle that is set in a tray of water. The candle will heat the air inside the container.

As the air is heated, bubbles will be driven from the mouth of the container. (The air inside expands, and the increased pressure forces out some of the air that was inside.)

This writer, not being a brilliant scientist, but having paid attention in earlier activities, remembers that we can't have fire without air. It seems, then, that the candle will stop burning when it runs out of air inside the container.

When the candle is extinguished and the air inside cools, water will enter the inverted container.

You will realize that this is caused by a reduction in air pressure inside the container. (The outside air pressure is greater than that inside the cooled jar, and its push on the surface of the water forced some of it into the container.)

We'll have to find out how this can help us in the "real" world.

Contact Spike
Any problems with this page? Send URL to webmaster.  Thank you!
Add to Favorites
Search this site powered by FreeFind

Send this page to a friend

Back to Spike's & Jamie's Recipe Collection





Sign Guestbook    View Guestbook


We publish two newsletters a couple of times a month. To subscribe, send a blank email to the appropriate email address.  Topica will send you a message asking if you really intended to subscribe - just click reply - that's it!

Free Recipe Collection Newsletter:

Jewish Recipe Collection Newsletter:



Barnes & Noble Home Page  Barnes & Noble Music Page


Tired of Geek Speak when 
you have Computer Questions?