Friday, July 30, 2010

Water Bottle Experiment

This science experiment also makes a great water toy!  Add it to your collection from yesterday!

You need:
Empty water or pop bottle
Thumbtack
Water
Pan

1)  Poke holes with the thumbtack a few inches up from the bottom of the bottle.  I made a line of holes around the bottle.

2)  Fill the bottle with water, place the cap back on, and put in a pan.

3)  Experiment!  What happens when you take the lid off?  When you put it back on?  Twist if off a little bit?

When the lid is on the bottle air pressure cannot push the water through the holes.  Take it off, and the water starts pouring through the holes.  When the lid is on, surface tension (water's "skin") keeps most of the water from leaking out.  For a more detailed explanation, check out Steve Spangler's Science website.

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4 Comments:

Blogger Jenae said...

What a fun and simple experiment! :) www.icanteachmychild.com

September 7, 2010 at 12:18 PM  
Blogger Infant Bibliophile said...

Very cool! Love this idea. :)

September 7, 2010 at 3:02 PM  
Blogger Tami said...

I love science and kids. This is a great one!

September 9, 2010 at 5:58 PM  
Blogger Julie said...

I've never seen this experiment, but it's great! Fun, simple, & with a purpose. Just the kind of thing I like ;) Thanks for linking to it!

June 2, 2011 at 5:25 PM  

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