Question: How do different surface areas affect bacterial growth?
Hypothesis: I think that the bacterial growth will be different in terms of size, shape, type and color. I think that different bacterias will grow on each quadrant because each surface of collection has unique bacterias. The unique bacterias will contribute to the fact that the size and color of them will also be different. I also predict that the growth of bacteria on the toilet seat (1D) will have the most colonies because it is a frequently used/touched surface. The phone (1C) will have a good amount of bacterial growth as well, but not nearly as much growth because phones are theoretically cleaned more often. Therefore, these two samples will have the most bacterial growth because they are touched often: allowing bacteria to survive …show more content…
Wash hands and spray down or wipe your work are with disinfectant. Dry off with paper towels.
Label the bottom of your agar plate (petri dish) as diagrammed in your Experimental Design (note: the bottom of the plate contains the nutrient agar, which looks like a clear/beige gelatinous material).
Determine your two sources of collection for bacteria specimens. When you have decided, write them in tour data table on your lab report.
Collect bacteria specimens from tour two sources by rubbing the Q-Tip on the source. If bacterial source is dry, dampen Q-tip first, then rub over source.
Apply the correct Q-Tips to the correct portions of agar.
“Swab” or “weave” the end of the Q-Tip across the designated area so that you can expose the maximum amount of agar. Do not apply too much pressure with the Q-Tip on the agar - it is somewhat delicate and may tear.
Complete 4a with the other Q-Tips in the correct area.
6. When all the collections have been made, tape the sides of the petri dish. From this point on, do not open up the petri dish. All observations will be made through the petri dish.
7. Place the petri dish in the
Hypothesis: I think that the bacterial growth will be different in terms of size, shape, type and color. I think that different bacterias will grow on each quadrant because each surface of collection has unique bacterias. The unique bacterias will contribute to the fact that the size and color of them will also be different. I also predict that the growth of bacteria on the toilet seat (1D) will have the most colonies because it is a frequently used/touched surface. The phone (1C) will have a good amount of bacterial growth as well, but not nearly as much growth because phones are theoretically cleaned more often. Therefore, these two samples will have the most bacterial growth because they are touched often: allowing bacteria to survive …show more content…
Wash hands and spray down or wipe your work are with disinfectant. Dry off with paper towels.
Label the bottom of your agar plate (petri dish) as diagrammed in your Experimental Design (note: the bottom of the plate contains the nutrient agar, which looks like a clear/beige gelatinous material).
Determine your two sources of collection for bacteria specimens. When you have decided, write them in tour data table on your lab report.
Collect bacteria specimens from tour two sources by rubbing the Q-Tip on the source. If bacterial source is dry, dampen Q-tip first, then rub over source.
Apply the correct Q-Tips to the correct portions of agar.
“Swab” or “weave” the end of the Q-Tip across the designated area so that you can expose the maximum amount of agar. Do not apply too much pressure with the Q-Tip on the agar - it is somewhat delicate and may tear.
Complete 4a with the other Q-Tips in the correct area.
6. When all the collections have been made, tape the sides of the petri dish. From this point on, do not open up the petri dish. All observations will be made through the petri dish.
7. Place the petri dish in the