Procedure/ Materials: The process taken for this prove involved two p lastic (ziplock) bags, unrivaled for the control and one for the variable. In the control bag we put a slash of bread in the bad with a blunt cloth. In the bag that contained the variable, we put another piece of bread (the like kind) with a damp cloth, this time adding tomato extract. We whence waited for the results. Sources of mistake: The water was contaminated and had microorganisms living in it. This could stand by promot...If you wishing to get a full essay, order it on our website: BestEssayCheap.com
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