Pasteur Solve Spallanzanis Problem

Pasteur Solve Spallanzanis Problem

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How did Pasteur solve Spallanzani’s problem of limiting exposure to air?Used a flask with a bent neck that allowed air (NOT microorganisms in the air) to get to the broth6.What purpose did boiling the meat broth serve in both the Spallanzani and Pasteur experiments?Boiling ensured that there were NO living organisms in the broth at the beginning of the experiment.7.How do the Redi, Spallanzani, and Pasteur experiments disprove the hypothesis you wrote in Question 1?Each instance where organisms were thought to arise spontaneously, an alternate explanation was provided for the appearance.1
Scientific Method Practice______8. Who uses the scientific method?a. everyone, to solve both scientific and non-scientific problemsb. only studentsc. only doctorsd. only teacherse. only research scientists______9. Which of the following is true about a hypothesis?a. it should be phrased as a questionb. it should be phrased as a possible answer to your original questionc. it should be made only after you analyze your experimental datad. all of thesee. none of these______10. Which of the following is the best definition of “controlled variables”?a. factors which are used onlyin the control groupb. data collected during the course of an experimentc. factors which are the same between your control and experimental groupsd. factors which are different between your control and experimental groups_____11. Which of the following should you do after the conclusion of your experiment?a. share your findings with others b. consider repeating your experiment to confirm your resultsc. think about sources of error in your experiment and consider revising your procedure and trying again.d. all of thesee. none of these_____ 12. What is the purpose of analyzing data collected during an experiment?a. to make sure you wrote down all of the information correctlyb. to organize the data (including tables and graphs)c. to use the information collected to draw conclusionsd. all of thesee. none of these_____13. Which of the following is an example of collecting data?a. Justin wondered if plant dyes could be taken out of plant leaves, flowers, and stems.b. Susan said “If I fertilize my geranium plants, they will blossom.”c. Angela’s experiment proved that earthworms move away from light.d. Arthur noted that his basil plants were 10 cm higher after treatment with a fertilizer._____14. Suppose a student collected the following data during her experiment: 14cm, 16 cm, 18 cm. This is an example of:a. qualitative datab. quantitative data____15. In any experiment, how many experimental variables should be tested at a time?a. an unlimited numberb. 2-5c. only 1d. over 1004
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