Water Purify (2010-8-17)
Water Purify
What are the best materials to purify water, and why? science project?
my teacher gave me materials Use gravel, cotton wool, sand, coffee filter, and coal. So we know why we use this equipment to purify water, we can add other things if we want.
no idea
Cuisinart DCC-RWF-12 Water Filter Case of [...]