1. Scientific Method Freeman

2. Examine the two types of cookies on the next slide. Answer the following:  Which cookie would you eat first: A or B?  List at least 2 reasons why you would eat that cookie first.

3. WHICH WOULD YOU PREFER? COOKIE A COOKIE B

4. Steps of the Scientific Method

5. Observation/Question

6. Hypothesis

7. Experiment

8. Analyze Data

9. Type of Data: Quantitative

13. Type of Data: Qualitative

15. Practice with Quantitative and Qualitative Data

16. Conclusion

17. Publish Data

19. Types of Variables: Independent Definition: what is changed by the scientist (experimenter) Explanation: – What is tested? – What is manipulated?

20. Types of Variables: Dependent Definition: what might be affected by the change Explanation: – What is observed? – What is measured? – The data collected during the investigation

21. Types of Variables: Constant Definition: something that is not changed but remains the same throughout Explanation: – Allows for a comparison of data

22. Let’s Practice!!!!!!

23. Example #1 Students of different ages were given the same jigsaw puzzle to put together. They were timed to see how long it took to finish the puzzle. Identify: – Dependent variable: – Independent variable: – Constant:

24. Dependent Variable: Time: How long it took the students to put it together

25. Independent Variable: Ages of the Students

26. Constant: Same Puzzle

27. Example #2 An investigation was done to see how different fertilizers would affect plant growth Identify: – Dependent variable: – Independent variable: – Constant:

28. Dependent Variable: Plant Growth

29. Independent Variable: Fertilizers

30. Constant: Same plant, same location, etc.

31. Example #3 An investigation was done with an electromagnetic system made from a battery and wire wrapped around a nail. Different sizes of nails were used. The number of paper clips the electromagnet could pick up was measured. Identify: – Dependent variable: – Independent variable: – Constant:

32. Dependent Variable: Number of paper clips picked up

33. Independent Variable: Size of nails

34. Constant: Battery, wire, type of nail, etc

35. Example #4 The higher the temperature of water, the faster an egg will boil. Identify: – Dependent variable: – Independent variable: – Constant:

36. Dependent Variable: Time to cook an egg

37. Independent Variable: Temperature of water

38. Constant: Type of egg, amount of water, pan used, etc.

39. Example #5 The temperature of water was measured at different depths of a pond. Identify: – Dependent variable: – Independent variable: – Constant :

40. Dependent Variable: Temperature

41. Independent Variable: Depth of water

42. Constants: Pond measured, thermometer, time of day