Experimental Design

# Experimental Design

Télécharger la présentation

## Experimental Design

- - - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - - -
##### Presentation Transcript

1. Experimental Design 8th 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

12. Control Group • It represents what is Normal. • Doesn’t get any treatment. • Give them aplacebo (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

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.