3. results

time Taken/s	20	40	60
Observation	Bacteria covers almost entire area that was exposed	Bacteria covers slightly more than half the area that was exposed to UV rays	Bacteria covers around half the area that was exposed to UV rays
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Remarks	20 Seconds does barely anything to the bacteria. The sample must be placed under the biosafety cabinet for a longer period of time for better results.	40 Seconds is a slight improvement from 20 seconds. Although there is a slight improvement, the amount of bacteria is still too much to record anything down.	60 Seconds did kill more bacteria than the 40 seconds sample. However, it is  also still too much to collect any data

GROUP 2 OF PETRI DISHES

Independent Variable (time Taken, seconds)	60 Seconds	180 Seconds	300 Seconds
Observation	Almost no bacteria can be seen.	Almost no bacteria can be seen	No noticeable patch of bacteria can be seen
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Remarks	60 Seconds killed more than 80% of bacteria. The results were different from the first as the water samples were taken on different days and the amount of bacteria in it was different	180 Seconds is similar to 60 seconds (inconsistent) as 60 seconds has already killed almost all the bacteria, 180 seconds killed even more and most bacteria could not be seen except for a few tiny dots	300 Seconds is enough to wipe out all, if not most of the bacteria

GROUP 3 OF PETRI DISHES (Results observed to be very similar to that of Group 1)

Independent Variable (time Taken, seconds)	20 Seconds	40 Seconds	60 Seconds
Observation	Covers almost entire area that was exposed	Covers slightly more than half the area that was exposed to UV rays	Covers around half the area that was exposed to UV rays
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Remarks	20 Seconds does barely anything to the bacteria	40 Second is a slight improvement to 20 seconds.	60 Second kills some bacteria but is still too short.

GROUP 4 OF PETRI DISHES

Independent Variable (time Taken, seconds)	40 Seconds	60 Seconds	80 Seconds
Observation	Bacteria covers almost entire area that was exposed	Lesser Bacteria but still covering around 50% of the area	Lesser Bacteria but still coversing around 50% or less of the area
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Remarks	40 Seconds killed too little bacteria. Most of the bacteria are still on the surface of the agar and data could not be recorded. This happened as samples were also taken on different days of experiment 2.	More bacteria is killed then the one in 40 seconds. However, it is also still too much bacteria to count. Therefore, the data could not be recorded.	80 Seconds only manages to destroy 50% of bacteria. It is still too much bacteria to count and data cannot be recorded

GROUP 5 OF PETRI DISHES

Independent Variable (time Taken, seconds)	100 Seconds	120 Seconds	140 Seconds
Observation	There were about only one-two small noticeable patches of bacteria on the exposed area	There was about only one small noticeable patch of bacteria on the exposed area	There was no sign of bacteria
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Remarks	100 Seconds wipes out around 80-90% of the bacteria. Samples taken for this experiment were  also taken from different days from the rest of the other experiments. Therefore, the results are inconsistent.	120 Seconds kills more bacteria than 100 seconds, leaving almost no bacteria behind	140 Seconds is able to wipe out almost all, if not all, bacteria.