Monday, March 30, 2009

Magic or Science?

First take a tissue, or in our case, a few squares of toilet paper and push it into the bottom of a small plastic cup. Make sure it gets wedged in there so it doesn't fall out when you turn the cup upside down. Fill a deep container with water, but leave room at the top for water displacement.
Now invert the cup and push it down into the water. Make sure to keep it level so you don't get bubbles. BUBBLES ARE YOUR ENEMY! Push it all the way under the water. It's so easy that even a three-year-old can do it.While you hold the cup submerged under water, talk about what is probably happening to the tissue. My kids were convinced the tissue was getting wet. And why wouldn't it? It's totally under water!

But when you pull the cup up (again, no bubbles!), you'll find a dry tissue! I promise ours was dry. I just didn't take a picture for some reason. Now it's time to figure out why and how you have a dry tissue!
Here's a hint: It's not magic! It's 2nd grade science so you should be able to figure it out. :)

2 comments:

Anonymous said...

Very cool! I'll have to bookmark this one, too.

Noodle said...

My children LOVE to do this! We didn't use tissues though; we used matches and then struck the match. My urchins love just about anything that requires fire. ROFL!