Question

a petri dish with clusters of bacteria
avas friends followed the \five - second rule\: they would eat food that had dropped on the floor, but only if it was on the floor for less than five seconds. ava thought that bacteria would stick to food as soon as it touched the floor, so the amount of time on the floor wouldnt affect how much bacteria stuck to the food. she placed twelve boiled noodles on the kitchen floor, picked up six after three seconds, and picked up the rest after ten seconds. then, she touched each noodle to a separate petri dish used to grow bacteria. after one week, the bacteria that had transferred from each noodle to its petri dish had grown to visible clusters. because there were more bacteria on the ten - second dishes than the three - second dishes, ava reasoned that the amount of time on the floor did affect how much bacteria stuck to the food. she showed her friends pictures of the petri dishes and a graph of her results.

Explanation:

Ava conducted an experiment to test the idea that the time food is on the floor affects the amount of bacteria that sticks to it. She placed boiled noodles on the floor for different times (3 and 10 seconds), transferred the bacteria to Petri - dishes, and observed the growth of bacteria. The result that more bacteria were on the 10 - second dishes than the 3 - second dishes supported the conclusion that time on the floor impacts bacterial adhesion.

Answer:

Ava's experiment showed that the amount of time food is on the floor does affect how much bacteria sticks to it.