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The Scientific Method
Each sentence below describes a step of the scientific method. Match each sentence with a step of the
scientific method listed below.
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Use after Section 1:11.
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 mouthwash 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. Dana wanted to know how synthetic fibers were different from natural fibers.
7. Edward saw bats catching insects after dark. He asked, "How do bats find the
insects after dark?"
8. Justin wondered if dyes could be taken out of plant leaves, flowers, and stems.
9. Arjulia soaked six different kinds of seeds in water for 24 hours. Then she
planted the seeds in soil at a depth of 1 cm. She used the same amount of water,
light, and heat for each kind of seed.
10. Bob read about growing plants in water. He wanted to know how plants could
grow without soil.
11. Kevin said, "If I grow 5 seedlings in red light, the plants will grow faster than the
5 plants grown in white light."
12. Angela's experiment showed that earthworms move away from light.
13. Scott said, "If acid rain affects plants in a particular lake, it can affect small
animals, such as crayfish, that live in the same water."
14. Michael experimented with the diets of guinea pigs. He found that guinea pigs
need vitamin C and protein in their diets.
15: Kim's experiment showed that chicken egg shells became stronger if the hen ate
feed to which extra calcium had been added.