2. Good Morning! Please have your notebook on your desk.

3. The Scientific Method What is it? Logical, problem-solving technique

4. Steps Of The Scientific Method  Problem  Background Information  Hypothesis  Materials  Procedure  Data/Results  Conclusion

5. Hint To Remember The Steps People  Problem Hate  Hypothesis Mud  Materials Pigs  Procedure Don’t Really  Data/Results Care  Conclusion

6. Problem Statement question A question that compares variables. Should be what you want to find out. –Example: Does the drop height affect the bounce height of a superball?

7. What Are Variables? Something that changes. There are independent variables and dependent variables.

8. Look back at the last example: Example: Does the drop height affect the bounce height of a superball? What two things are changing? Drop height, bounce height These are the VARIABLES.

9. What is an Independent Variable? (Also called Manipulated Variable)  We manipulate, or change it, on purpose. Example: Does the drop height affect the bounce height of a superball? Independent Variable in example: Drop heights used (we change them on purpose)

10. What is a Dependent Variable? (Also called Responding Variable)  Changes depending on the result of the independent variable  Data you are collecting Example: Does the drop height affect the bounce height of a superball? Dependent Variable in example: bounce heights (We don’t know them before we start.)

11. What is a Constant?  Does not change for the duration of an experiment Example: Does the drop height affect the bounce height of a superball? One constant in example: superball (Does not change during the experiment - same ball would be used)

12. What is a Control Group? The untreated group The control group provides basis for comparison.

13. Hypothesis EDUCATED GUESS What you think the results of the experiment will show Example: If a superball is dropped from increasing heights then the bounce heights will also increase because…(explain why)

14. Materials List of items used to conduct an experiment (Don’t list pencil and paper unless part of experiment.) Be sure to list quantities and sizes of equipment (metric)

15. Procedure Numbered steps of the experiment that will be followed to answer the problem Note: An experiment can only test one independent variable at a time. Note: To ensure reliability and validity, repeated trials should be done.

16. Data/Results Observations Graphs Drawings Pictures Charts Tables And so on….

17. Conclusion A statement that presents the findings of the experiment using specific data Answers the problem Explains what the data shows (data should support conclusion) States if the hypothesis was supported or rejected

18. Why Do We Use Graphs? Graphs help us visualize numerical data. There are several different types of graphs: –Bar graphs –Pie graphs (Circle graphs) –Line graphs

19. Bar Graphs Bar graphs are used to show a comparison of multiple objects.

20. Pie Graphs Pie graphs are used to compare the parts of a whole.

21. Line Graphs Line graphs are used to show the relationship between variables. Many times line graphs show change over time.

22. Graphing Variables The Independent Variable (Manipulated Variable) is graphed on the X-Axis The Dependent Variable (Responding Variable) is graphed on the Y-Axis

23. Remember: DRY MIX X-axis Y-axis Manipulated Variable also called Independent Variable Dependent Variable also called Responding Variable

25. 1. What is the independent variable? a.Temperature b.Time c.Solubility

26. 2. Which is a correct statement from the graph? a. The solubility increases as the temperature decreases. b. The solubility decreases as the temperature decreases. c. The solubility increases as the temperature increases.

27. 3. What is the variable that changes depending on some other factors? A.Independent Variable B.Dependent Variable C.Controlled Variable

28. 4. A variable that does not change for the duration of an experiment. A. Independent Variable B. Dependent Variable C. Controlled Variable

29. 5. What you think the results of the experiment will show. A.Problem B.Hypothesis C.Conclusion D.Data

30. 6. An opinion, or conclusion, based on observed facts. A.Observation B.Inference C.Data D.Conclusion