In Pg. 4

1. In Pg. 4 • What is the Problem/Question statement? • Answer in Blue Black or Pencil

2. Do it now! Proficiency / Exit Question. Page 4

4. IN Pg. 6 • What is a hypothesis? • Answer in Blue

5. IN Pg. 6 • What is a hypothesis? • ****A suggested solution to your problem.*******

6. Do it now Pg. 6 Use the graph to answer the following question. How far did the car travel during the first 15 s of the trip? • 15 m • 25 m • 300 m • 500 m From: http://www.doe.mass.edu/

7. THE SCIENTIFIC METHOD Solving a problem in an orderly and systematic way.

8. 1. What is the Problem/Question statement? • Develop a question or problem that can be solved through experimentation.

9. 2. What is Research? • Gather as much information as you can on the problem. • Review everything important related to the question. • This is done through your own past knowledge and/or through research. ???Paraphrase???

10. 3. What is a Hypothesis? • ****A suggested solution to your problem.******* • This is also called an educated guess. Example: If soil temperatures rise, then plant growth will increase

11. 4. How does an EXPERIMENT to test the hypothesis? • Only test one thing at a time. • Develop and follow a procedure. • Include a detailed materials list. • The outcome must be measurable (quantifiable)

12. Variables • Different factors that can change in an experiment. • It is very important that you only change ONE variable when conducting an experiment. • Why?

13. Types of Variables • Independent Variable • The thing you are testing. • The ONE AND ONLY variable you will allow to change. • Control • What you will compare your results to. • Usually just the absence of the Independent Variable.

14. Types of Variable Cont. • Standardizing Variables/Constants • The variables that you don’t allow to change. • What you keep the same in each test. • Dependent Variable • What you measure to compare the results of your tests • Should be able to be charted or graphed. • Changes as a result of the independent variable.

15. For the following experiments, define the (IV) independent variable, (DV) dependent variable, (SV) standardizing variables and (CG) control group. • The number of flowers on different breeds of bushes in a greenhouse is recorded every week for two months. IV_________________________________ DV________________________________ SV________________________________ A

16. The number of flowers on different breeds of bushes in a greenhouse is recorded every week for two months. IV: Different breeds of bushes that are counted DV: The number of flowers produced by each bush SV: Amount of water given to the plant, temperature in the greenhouse, amount of sunlight, etc. A

17. 2. You give four sunflower plants different waterings with either pure water or different concentrations of salt solutions. After a two-week period, the height is measured. IV_________________________________ DV_________________________________ CG_________________________________ A

18. 2. You give four sunflowers plants different watering with either pure water or different concentrations of salt solutions. After a two-week period, the height is measured. IV: Water with different salt concentrations DV: Height of plants CG: Plants that were given water with no salt A

19. Three redwood trees are kept at different humidity levels inside a greenhouse for 12 weeks. One tree is left outside in normal conditions. Height of the trees are measured once a week. IV_________________________________ DV________________________________ SV________________________________ CG________________________________ A

20. Three redwood trees are kept at different humidity levels inside a greenhouse for 12 weeks. One tree is left outside in normal conditions. Height of the trees are measured once a week. IV: Humidity level DV: Height of trees SV: temperature of greenhouse, amount of water given to trees, same species of trees used, etc. CG: Tree left outside in normal conditions A

21. Pea plant clones are given different amounts of water for a three-week period. The first pea plant receives 400 mL. The second pea plant receives 200 mL. The third pea plant receives 100 mL. The fourth pea plant receives only what it gets naturally. The height of the pea plants is recorded daily. IV______________________________________ DV_____________________________________ SV_____________________________________ CG_____________________________________ A

22. Pea plant clones are given different amounts of water for a three-week period. The first pea plant receives 400 mL. The second pea plant receives 200 mL. The third pea plant receives 100 mL. The fourth pea plant receives the water it gets naturally. The height of the pea plants is recorded daily. IV: amount of water DV: how much the plant grows SV: amount of sunlight, temperature, same species of pea plants, etc. CG: The plant that gets its water naturally A

23. One tank of goldfish is fed the normal amount which is once a day; a second tank is fed twice a day, and a third tank is fed four times a day during a six week study. The fish’s body fat is recorded daily. IV_________________________________ DV________________________________ SV________________________________ CG________________________________ A

24. One tank of goldfish is fed the normal amount which is one a day; a second tank is fed twice a day, and a third tank is fed four times a day during a six week study. The fish’s body fat is recorded daily. IV: amount of food fed to the fish DV: how much body fat the fish gained SV: same species of fish, same type of food fed to fish, same temperature of water, etc. CG: the tank of goldfish that is fed the normal amount, which is once a day. A

25. You decide to clean the bathroom. You notice that the shower is covered in a strange green slime. You decide to try to get rid of this slime by adding lemon juice. You spray half of the shower with lemon juice and spray the other half of the shower with water. After 3 days of “treatment” there is no change in the appearance of the green slime on either side of the shower. IV_________________________________ DV________________________________ CG________________________________ A

26. You decide to clean the bathroom. You notice that the shower is covered in a strange green slime. You decide to try to get rid of this slime by adding lemon juice. You spray half of the shower with lemon juice and spray the other half of the shower with water. After 3 days of “treatment” there is no change in the appearance of the green slime on either side of the shower. IV: Lemon juice DV: Amount of slime on shower CG: Spraying shower with water

27. 5. How do you Record and Analyze Data? • Carefully record anything that happened. • These facts are called DATA. • Modify the procedure if needed. • Confirm the results by retesting. • Include tables, graphs, and photographs.

28. 6. What is a Conclusion? • First, include a statement that accepts or rejects the hypothesis. • Next, review the entire lab and then restate the problem in the conclusion section of the lab. The data supports the hypothesis because…

29. Summary at the end of the notes in green! • Draw a line under the last sentence of your notes. • Write a paragraph of 5 complete sentences for an excellent summary. • Use Green Pen, Marker or Pencil.

30. Out Pg. 4 • What is the Conclusion? • Answer in Blue:

31. Out Pg. 6 • How do the Independent and dependent variables relate to each other? How are they different? • Answer in Blue: