Thursday, January 24, 2008

[Houa's Blog] investigate 2

yes! my hypothesis was right because when i saw the water runoff some clay and sand and some water then when there's no more water plug back the rubber stopper.

Posted By Houa to Houa's Blog at 1/24/2008 11:00:00 AM

1 Comment:

Wm Chamberlain said...

What was your hypothesis?