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Stage 1
Answer 4 questions correctly in a row.

The passage below describes an experiment.

spaghetti boiling in a pot

Percy heard about the "five-second rule" from a friend. The rule states that if food is dropped on the floor, it can safely be eaten if picked up within five seconds. Percy was curious if this was true. He boiled twelve pasta noodles and put eight of them on the floor. Of these eight, Percy picked up four after two seconds and the other four after six seconds. He then cultured the bacteria on each noodle and observed how much bacteria grew in each culture.

In this experiment, which were part of an experimental

group?

the noodles that were put on the floor and picked up after two seconds

the noodles that were not put on the floor