1. Experimental Design 8 th Grade Science Objective: Design a controlled scientific experiment S1, C2, PO2

2. What careers or professions use the Scientific Method? scientists city water/ sewer/ landfills/etc. medical professions research and development of products ??

3. The Bad News? Test results are in…The diagnosis? You have blah-blah disease.

4. The Good News? There might be a cure but the treatment is still experimental. You have to participate in a clinical study to determine the effectiveness of the treatment.

5. Problem Does Blahcure relieve the symptoms of Blah- Blah disease?

6. Hypothesis The more Blahcure given/taken, the less evident the symptoms will be.

7. Independent Variable medication

8. Dependent Variable Measure the symptoms of the disease Check to see if patient feels better

9. Constants Same disease & level of sickness Age of participant Same health conditions of diet, exercise, vitamins, etc. Habits such as smoking or drinking Same exam

10. Experimental Group Different amounts of the medication

11. Treatment Description Group 1Group 2Group 3Group 4 10 mg of Blahcure 20 mg of Blahcure 30 mg of Blahcure ????????

12. Control Group It represents what is Normal. Doesn’t get any treatment. Give them a placebo (fake pill).

13. 2. Problem Does the amount of fertilizer given to a plant affect how tall the plant will grow?

14. Hypothesis The more fertilizer used, the taller the plant will grow.

15. Independent Variable fertilizer

16. Dependent Variable Height of the plant

17. Constant Variables Sunlight Climate Water Soil (sandy, peat moss, etc)

18. Treatment Description Group 1Group 2Group 3Group 4 1 container per month. 2 containers per month. 3 containers per month. ? ???????

19. Control Group It represents what is Normal. So what is “normal?”. Plain dirt…NORMAL SOIL.

20. Experimental Group Different amounts of fertilizer.

21. 3. Problem Does the type of tennis shoe effect the number of shin splints and knee problems for runners?

22. Hypothesis The __________ (kind of shoe) will reduce the number of shin splints/knee problems the runner will have.

23. Independent Variable Kinds of shoes

24. Dependent Variable Number of shin splints and knee problems runners have.