Each sentence below describes a step of the scientific method. Match each sentence with a step of the scientific method listed below.
A. Recognize a problem B. Form a hypothesis C. Test the hypothesis with an experiment D. Draw conclusions
1 Stephen predicted that seeds would start to grow faster if an electric current traveled through the soil in which they were planted.
2 Susan said, “If I fertilize my geranium plants, they will blossom.”
3 Jonathan’s data showed that household cockroaches moved away from raw cucumber slices.
4 Rene grew bacteria from the mouth on special plates in the laboratory. She placed drops of different mouthwashes on bacteria on each plate.
5 Kathy used a survey to determine how many of her classmates were left-handed and how many were right-handed.
6 Jose saw bats catching insects after dark. He asked, “How do bats find the insects in the dark?”
7 Justin wondered if dyes could be taken out of plant leaves, flowers, and stems. 8 Kevin said, “If I grow five seedlings in red light, I think the plants will grow faster than the five plants grown in white light.”

Here the word “predicted” implies that Stephen is making a hypothesis that seed growth can be accelerated by allowing electricity to pass through the soil in which the seeds are embedded. Option B is correct.

2.

Susan concluded that fertilizing the geranium plants will allow them to bloom. Option D is correct.

3.

Jonathan made a conclusion from his data about the behavior of household cockroaches in the presence of raw cucumber slices. Option D is correct.

4.

Rene performed an experiment to test her hypothesis. Rene was testing the effect of different mouthwashes on mouth bacteria grown on special plates in the laboratory. Option C is correct.

5.

Kathy here did an experiment by conducting a survey on her classmates to find the exact number of left-handed vs right-handed classmates. Option C is correct.

6.

Jose is asking a question therefore he is addressing a problem. Option A is correct.

7.

Justin is asking a question. He is addressing the problem of how to take out dyes from plant leaves, flowers, and stems. Option A is correct.

8.

Kevin is thinking and making an assumption that red light will be better for plant growth than white light. Option B is correct.