first set of experiments

	Control	A	B	C
Hours in sun	0	4h	4&1/2h	5h
Percentage of area covered	30%	8%	4%	15%

Both sample A and B produced the expected result-Sample A has more bacteria than sample B-since it was exposed to sunlight for a shorter period of time. Sample C, on the other hand has significantly more bacteria than A and B. That should not have been the case since more bacteria should have been killed since it was exposed for the longest period(5h). Even though there was this particular anomaly, all the 3 samples which had been placed under the sun, had a significant decrease in the amount of bacteria as compared to the control sample.

% of area bacteria cover for control-30%

% of area bacteria cover for sample A-8%

% of area bacteria cover for sample B-4%

% of area bacteria cover for sample C-15%