Question

In this activity, you'll grow bacteria in four prepared petri dishes. The first petri dish will have a sample swabbed from your unwashed hands. The second petri dish will have a sample swabbed from your hands after washing them with regular soap. The third petri dish will contain another sample from your unwashed hands. The fourth petri dish will contain a sample taken after cleaning your hands with hand sanitizer. What do you think the results will be? Write down your predictions for which samples will show the greatest and least bacteria growth. bacteria: unicellular organisms that sometimes have cell walls but do not have organelles and an organized nucleus

Answer 1

Step-by-step explanation:

In this study, the swabs taken should represent different amounts of bacteria growth. The samples that were swabbed from unwashed hands should show the greatest bacteria growth. This is because there already existing bacteria have not been killed and have been allowed to reproduce, and since bacteria reproduce at an alarming rate (roughly doubling every 4 minutes) it would pick up momentum easily. Next, would be the swabs of hands washed with soap since soap cleans your hands killing off most of the harmful bacteria thus lowering its rate of reproduction drastically. Lastly, would be the swabs of hands cleaned with hand sanitizer since hand sanitizer is designed to kill 99.9% of germs it comes in contact with therefore eliminating nearly every germ in your hands. This also makes it very unlikely that the swabs managed to pick up any germs.