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.
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Posted By Houa to Houa's Blog at 1/24/2008 11:00:00 AM
Thursday, January 24, 2008
[Houa's Blog] investigate 2
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1 Comment:
What was your hypothesis?
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