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The Scientific Method

The Scientific Method. Observe Question Research . D. Hypothesize! (educated guess) E. Experiment F. Data. G. Analyze H. Conclude. Hypothesis- 1 explanation Theory- many hypotheses proven over time! fact/truth. Hypothesis vs. Theory. Fall 2013. The Skinny On the Sci Method .

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The Scientific Method

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  1. The Scientific Method

  2. Observe • Question • Research

  3. D. Hypothesize!(educated guess) E. Experiment F. Data

  4. G. Analyze H. Conclude

  5. Hypothesis- 1 explanation Theory- • many hypotheses proven over time! • fact/truth Hypothesis vs. Theory

  6. Fall 2013 The Skinny On the Sci Method

  7. Control group: group that is left alone no variable is introduced to it! used for COMPARISON Experimental group: group that is changed variable introduced Control Group vs. Experimental Group

  8. Independent Variable • The factor that was changed • Dependent Variable: • The result of the change Skinny on Variables

  9. Scenario • Melly Sue has always wondered if her goldfish could withstand slightly colder water. She decides to perform a scientific experiment! After having done some research on goldfishes, she thinks that colder water will cause her fish’s heart rate to increase.

  10. Problem: • Will changing temperature affect goldfish heart rate? • Hypothesis: • Iftemperature of environment decreases, thenheart rate will increase.

  11. 1 2 3 Experimental control Experimental 750F 700 F 650 F Billy notices that the fish’s heart rate decreased in the colder water, because their gills opened and closed slower. 4 5 Experimental Experimental 600 F 550 F

  12. RULES Every variable is kept the same, except for the independent variable Ex: same fish bowl same water same fish food same exposure to light same environmental stress Unavoidable Source of Experimental Error: the fish themselves

  13. Independent Variable: The decreasing temperature of the water. Dependent Variable: Decreasing heart rate Data:

  14. Results Heart Rate (bpm) Temperature (F)

  15. Conclusion: -Restate the problem. -Was the hypothesis correct? -Use data to support hypothesis. The experiment used the scientific _______ to test how ____ _____of fish would be affected by decreasing_______. The hypothesis was ______ correct, because decreasing temperature caused a ________ heart rate in the fish. The data collected showed that at 70 F, the heart rate was _______. At 60 F, the heart rate was _________. The results concluded that there was a ________ trend of heart rate with decreasing ________.

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