1. Scientific Method Water vs Sprite Experiment

2. Steps of the scientific method Observe: the environment Question: Recognize there is a problem and state it in question form Hypothesis- take an educated guess as to the answer Predict what we will see if we are right or wrong Test the predictions Draw a conclusion

3. Write the template in yr NB Observe: Question: Hypothesize: Predict: Test/Experiment Draw Conclusion:

4. Observe X-mas trees, how do we keep them alive longer?

5. Question I wonder if that will work for simple plants too, like a bean plant

6. Hypothesize I think it will help it grow faster

7. Predict If it grows faster, it will be taller than the control, within the next 2 weeks

8. Test/Experiment Get beans Get cups Label them: Give sprite Watch and measure growth- every other day

9. Draw Conclusion Either it did grow faster or it did not, or still grew at the same rate. Which means……

10. What makes a hypothesis valid? It must be able to be able to be tested Creationism: Not considered a valid hypothesis Evolution: We evolved from a primate-like ancestor.

11. What makes an experiment valid? Observe: Many reports of cancer in people who live down the valley

12. Question: It’s the oldest part of Belleville, and its by the polluted Passaic River

13. Hypothesis: Maybe the water supply is contaminated by river water

14. Predict: If this is true, I will find 10 or more families down the valley, where someone has cancer

15. Test: I sent all the families down the valley a survey to fill out and they all sent it back

16. Conclusion: 10 out of 500 families there have people in the home suffering from Cancer, so our hypothesis is right

17. What’s wrong with this experiment? Experimental vs. Control Control: other areas of Belleville Variables? Type of Water, food, radon, age- old/young…. You have to keep everything the same and test 1 thing at a time

18. There are 2 types of variables Independent variable: Independent variable: (manipulated variable) stands alone Dependent variable: Dependent variable: (responding variable) responds/ follows/ is expected to follow the independent variable In the Sprite vs. water…what are we adding/controlling…. What do we expect to change because of that?....

19. Why do we need a control? It validates the experiment… It establishes what is normal, or what would have happened anyway…. For comparison…

20. When testing medication, what is the control? Placebo Hair re-growth pill Results: 10 men (5 got placebo and 5 got the pill) What if 4 pill and 0 placebo re-grew hair, does it work? What about if… 4 pill and 2 placebo re-grew hair What about if 2 placebo and 2 pill re-grew hair?

21. For our Sprite experiment… How many variables should we have? How many variables should stay the same? List them What is the independent or manipulated variable? What is the dependent or responding variable?

22. Observe: Question: Hypothesize: Predict: Test/Experiment Test/Experiment Draw Conclusion:

23. Test/Experiment Get beans- Get cups Label them: Give sprite Put them aside Watch and measure growth- every other day

24. Inference/ Observation What is the difference? Look at the following pictures, make the inference or observation….