Mystery  Powders
	Methylene Blue Test
	Bromothymol Blue Tests
	Look what happens when we put water onto the baby powder....

 
 

	More Bottle Biology
Pillbug Testing What sort of environment do pillbugs prefer? How do we know? What sample size do we need?

Here are pictures from today's class
3/30/04

Building an eco-column

2 fish, one large plant, a snail....
 

desert on top, pond on bottom..... what happens if one is pink and one is clear?

Always good to have our experiments labeled!

What a cool bottle to build in!