1. Scientific Method

2. 1. Purpose. Ask a question.

3. 2. Research Make observations.

4. There are two types of observations.
Quantitative – Deals with numbers. Data which can be measured.
Examples: Length, height, area, volume, speed, time, temperature, etc.
Quantitative  Quantity

5. Qualitative – Data can be observed but not measured.
Examples: Colors, textures, smells, tastes, appearance, etc.
Qualitative  Quality

6. Inferences: Using your observations to make a guess about an object or an outcome.

8. Good quality research helps you develop an excellent hypothesis.

9. 3. Hypothesis An educated guess What do I think will happen if….?
What do I think my results will be?

10. Unit 1 Part 2
Scientific Process

11. 4. Experiment

12. Test the hypothesis.

14. Independent Variable – The variable that is changed on purpose.
Dependent Variable – The variable that responds to the independent variable.

15. Collect Data

16. Unit 1 Part 3
Scientific Process

17. 5. Analyze Data

18. Graph it!

19. 6. Conclusion

20. Communicate Results

21. 1. In the helicopter experiment, what was the independent variable?
The independent variable was folding the blades in different directions, with the black circle or the white square up.

22. 2. What was the dependent variable?
The dependent variable is the direction of the spin, clockwise or counterclockwise.

23. 3. List three things you should try to keep constant each time you try this experiment.
Holding the helicopter in the same place.
Holding it at the same height.
Making sure there is no cross breeze
Using the same helicopter
Adding no extra force when letting it go each time.

24. 4. What is the problem question in Bonita’s experiment?
Will adding the paper clips for mass stabilize the helicopter and make it stay in the air longer?

25. 5. What is Bonita’s hypothesis?
If additional paperclips are added to the helicopter, then the helicopter will be stabilized resulting in a longer flight time.

26. 6. What is her independent variable?
Bonita’s independent variable is the addition of paper clips (weight) to the helicopter.

27. 7. What is her dependent variable?
Bonita’s dependent variable is the amount of time the helicopter stays in the air.

28. 8. What should her constants be?
Her constants should be the same as those listed in #3, plus: use the same size paper clips, attach the paper clips to the same place on the helicopter each time, etc.

29. 9. What can she use for a control?
Her control is the same helicopter with no added paper clips (mass).

30. 10. Why should Bonita retest her experiment between 5-10 times?
Bonita should retest to make sure her results are reasonable, valid and repeatable.

31. Page 9 – Scientific Process Test Review
Page 1 – Lab Safety Rules (read over them)
Page 3 – Know: triple beam balance, beaker, graduated cylinder, Erlenmeyer flask
Page 5 – Measurement: prefixes, basic units, abbreviations. Measure using a triple beam balance and a graduated cylinder

32. Page 9 – Scientific Process Test Review Scientific Method
Step 1 – Purpose (problem question)
Step 2 – Research
Step 3 – Hypothesis (If…then… statement)
Step 4 – Experiment (independent variable, dependent variable, experimental/test group, control group)
Step 5 – Analyze Data
Step 6 - Conclusion