1. The Scientific Method

2. A. Observe B. Question C. Research

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

4. G. Analyze H. Conclude

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

6. The Skinny On the Sci Method Fall 2013

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

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

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: If temperature of environment decreases, then heart rate will increase.

11. 75 0 F 55 0 F60 0 F 65 0 F 70 0 F Billy notices that the fish’s heart rate decreased in the colder water, because their gills opened and closed slower.

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: Temperature (F)Heart Rate (BPM) 7530 7028 6525 6020 5518

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

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 ________.