1. What you need: Writing Utensil, Bellwork Sheet, Journal. Due Today! Lab Fee, About Me Page, Syllabus Signed (have out and ready). By Friday: Buff Binder, Notecards (4 sets), Ziplock bags or Clorox Wipes, Photo Assignment. Happy Wednesday, BIO- NINJAS Bellwork: Indicate which letters refer to students performing the lab safely and which letters do not. For each person not being safe, write at least one sentence stating what is wrong.

2. Standard B.2B - know that hypotheses are tentative and testable statements that must be capable of being supported or not supported by observational evidence. Essential Question Can I identify the variables in an experiment?

3. Direct Instruction CHAMPs C – Students may not talk unless it is part of a teacher led discussion. H – Raise your hand and ask. Do not yell out. A – Take notes in your journal. Follow instructions. M – Remain in seat. No movement unless specified. P – Take notes and ask content related questions.

4. Foldable time! Page 3 (left) Fold a tab Glue the back of the tab Label the tab “Scientific Method” Draw five lines to create six spaces Scientific Method

5. Foldable time! Page 3 (left) Label the spaces Cut the lines On the other side of the flap write the info from the notes On the notebook paper under flap write an example. Scientific Method Problem/Question Observation/Research Formulate Hypothesis Experiment Collect/Analyze Data Conclusion

6. The Scientific Method is a series of steps that are used to investigate a natural occurrence. *Right Side

7. Problem Observation Hypothesis Experiment Data Conclusion Write these words on your six flaps!

8. Steps of the Scientific Method Problem/Question 1. Problem/Question: Develop a question or problem that can be solved through experimentation.

9. Steps of the Scientific Method Observation/Research 2. Observation/Research: Make observations and research your topic.

10. Steps of the Scientific Method Formulate a Hypothesis 3. Formulate a Hypothesis: Predict a possible answer to the problem or question. Example: If soil temperatures rise, then plant growth will increase.

11. Steps of the Scientific Method 4.Experiment 4.Experiment: Develop and follow a procedure. * Be sure to test only one variable.

12. Steps of the Scientific Method Collect and Analyze Results 5. Collect and Analyze Results: Gather data and modify the procedure if needed.

13. Steps of the Scientific Method Conclusion 6. Conclusion: Include a statement that accepts or rejects the hypothesis.

14. Think you can name all seven steps? Problem/QuestionObservation/Research Formulate a Hypothesis Experiment Collect and Analyze Results Conclusion Communicate the Results

15. Let’s put our knowledge of the Scientific Method to a realistic example that includes some of the terms you’ll be needing to use and understand.

16. Problem John watches his grandmother bake bread. He ask his grandmother what makes the bread rise. She explains that yeast releases a gas as it feeds on sugar.

17. Problem John wonders if the amount of sugar used in the recipe will affect the size of the bread loaf?

18. Observation John researches the areas of baking and fermentation and tries to come up with a way to test his question. He keeps all of his information on this topic in a journal.

19. Hypothesis After talking with his teacher and conducting further research, he comes up with a hypothesis. “If more sugar is added, then the bread will rise higher.”

20. Hypothesis The hypothesis is proposed explanation made on the basis of limited evidence as a starting point for further investigation between the independent and dependent variables. Note: These variables will be defined in the next few slides.

21. Do you know the difference between the independent and dependent variables?

22. Independent Variable (right side) The independent, or manipulated variable, is a factor that’s intentionally varied by the experimenter. John is going to use 25g., 50g., 100g., 250g., 500g. of sugar in his experiment. *the thing you are changing or manipulating. *Changing ________ will determine or affect _____________.

23. Dependent Variable (right side) The dependent, or responding variable, is the factor that may change as a result of changes made in the independent variable. In this case, it would be the size of the loaf of bread. *responds to the independent variable (change or manipulation) *Changing ________ will determine or affect _____________.

24. Experiment His teacher helps him come up with a procedure and list of needed materials. She discusses with John how to determine the control group.

25. Control Group (right side) In a scientific experiment, the control is the group that serves as the standard of comparison. The control group may be a “no treatment" or an “experimenter selected” group.

26. Control Group The control group is exposed to the same conditions as the experimental group, except for the variable being tested. All experiments should have a control group.

27. Control Group Because his grandmother always used 50g. of sugar in her recipe, John is going to use that amount in his control group.

28. Constants John’s teacher reminds him to keep all other factors the same so that any observed changes in the bread can be attributed to the variation in the amount of sugar.

29. Constants (right side) The constants in an experiment are all the factors that the experimenter attempts to keep the same.

30. Can you think of some constants for this experiment?

31. Constants They might include: Other ingredients to the bread recipe, oven used, rise time, brand of ingredients, cooking time, type of pan used, air temperature and humidity where the bread was rising, oven temperature, age of the yeast…

32. Experiment John writes out his procedure for his experiment along with a materials list in his journal. He has both of these checked by his teacher where she checks for any safety concerns.

33. Data John comes up with a table he can use to record his data. John gets all his materials together and carries out his experiment.

34. Can you tell which group did the best?

35. Size of Baked Bread (LxWxH) cm 3 Amt. of Sugar (g.) 123Average Size (cm 3 ) 501296144012961344 601404129614401380 701638 15601612 8014041296 1332 90108012009721084 Size of Bread Loaf (cm 3 ) Trials Control group

36. Conclusion John finds that 70g. of sugar produces the largest loaf. His hypothesis is accepted.

37. Homework: The Simpsons worksheet you picked up is due tomorrow at the beginning of class. Examples 1 (Smithers), 3 (Bart), and 5 (Lisa) are mandatory. 2 and 4 are extra credit.

38. Quiz/Test CHAMPs C – No talking…..it’s a test. H – Raise your hand and wait for help to come. Do not yell out for a teacher. A – Work only on your quiz/test. M – Face forward and keep eyes on desk. Only get out of chair to turn in your quiz/test. P – Work only on your quiz/test. Ask questions if you’re confused. No heads on desk. Look only at your paper. Answer ALL questions.

39. Lab Safety Quiz – 10 Minutes