Question

each sentence below describes a step of the scientific method. match each sentence with a step of the scientific method listed below. 7. stephen predicted that seeds would start to grow faster if an electric current traveled through the soil in which they were planted. 8. susan said, \if i fertilize my geranium plants, they will blossom.\ 9. jonathans data showed that household cockroaches moved away from raw cucumber slices. 10. rene grew bacteria from the mouth on special plates in the laboratory. she placed drops of different mouthwashes on each plate. 11. kathy used a survey to determine how many of her classmates were left - handed and how many were right - handed. 12. jose saw bats catching insects after dark. he asked, \how do bats find the insects in the dark?\ 13. justin wondered if dyes could be taken out of plant leaves, flowers, and stems. 14. alice 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. 15. bob read about growing plants in water. he wanted to know how plants could grow without soil. 16. 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.\ 17. angelas experiment proved that earthworms move away from light. 18. scott said, \if acid rain affects plants in a particular lake, it might affect small animals, such as crayfish, that live in the same water.\ 19. michael fed different diets to three groups of guinea pigs. his experiment showed that guinea pigs need vitamin c and protein in their diets. 20. kims experiment showed that chicken eggshells were stronger when she gave the hen feed, to which extra calcium had been added. a. recognize a problem b. form a hypothesis c. test the hypothesis with an experiment d. draw conclusions

Explanation:

1. 7. Stephen predicted that seeds would start to grow faster if an electric current traveled through the soil in which they were planted. - Recognize a problem (A). Stephen has identified a potential relationship that he wants to explore.
2. 8. Susan said, "If I fertilize my geranium plants, they will blossom." - Form a hypothesis (B). Susan is making an educated - guess about the outcome of fertilizing her plants.
3. 9. Jonathan's data showed that household cockroaches moved away from raw cucumber slices. - Draw conclusions (D). Jonathan has analyzed his data and determined a result.
4. 10. Rene grew bacteria from the mouth on special plates in the laboratory. She placed drops of different mouthwashes on each plate. - Experiment (C). Rene is conducting a test to see the effect of mouthwashes on bacteria.
5. 11. Kathy used a survey to determine how many of her classmates were left - handed and how many were right - handed. - Experiment (C). Kathy is gathering data through a survey method.
6. 12. Jose saw bats catching insects after dark. He asked, "How do bats find the insects in the dark?" - Recognize a problem (A). Jose has observed a phenomenon and posed a question.
7. 13. Justin wondered if dyes could be taken out of plant leaves, flowers, and stems. - Recognize a problem (A). Justin has identified a question to investigate.
8. 14. Alice 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. - Experiment (C). Alice is conducting an experiment to test seed - growth under certain conditions.
9. 15. Bob read about growing plants in water. He wanted to know how plants could grow without soil. - Recognize a problem (A). Bob has identified a problem to study.
10. 16. 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." - Form a hypothesis (B). Kevin is making a prediction.
11. 17. Angela's experiment proved that earthworms move away from light. - Draw conclusions (D). Angela has analyzed her experiment results.
12. 18. Scott said, "If acid rain affects plants in a particular lake, it might affect small animals, such as crayfish, that live in the same water." - Form a hypothesis (B). Scott is making an educated guess.
13. 19. Michael fed different diets to three groups of guinea pigs. His experiment showed that guinea pigs need vitamin C and protein in their diets. - Draw conclusions (D). Michael has analyzed his experiment data.
14. 20. Kim's experiment showed that chicken eggshells were stronger when she gave the hen feed, to which extra calcium had been added. - Draw conclusions (D). Kim has drawn a conclusion from her experiment.

Answer:

1. A. Recognize a problem
2. B. Form a hypothesis
3. D. Draw conclusions
4. C. Experiment
5. C. Experiment
6. A. Recognize a problem
7. A. Recognize a problem
8. C. Experiment
9. A. Recognize a problem
10. B. Form a hypothesis
11. D. Draw conclusions
12. B. Form a hypothesis
13. D. Draw conclusions
14. D. Draw conclusions