1. General Science – Thurs, 09.04.2008 CATALYST Take out your Variables worksheet from yesterday – take 5 minutes to finish any problems you didn’t finish!

2. General Science – Thurs, 09.04.2008 REMINDERS -HW Packet #3 Due Friday! -Quiz #3 Friday!

3. General Science – Thurs, 09.04.2008 AGENDA -Writing a hypothesis -Practice writing hypotheses

4. Objectives SWBAT: SWBAT: Identify & create proper hypotheses. Identify & create proper hypotheses.

5. Make an Observation Make an Observation Ask a question Ask a question Construct a Hypothesis Construct a Hypothesis Test the Hypothesis Test the Hypothesis Analyze the Data Analyze the Data Draw a Conclusion Draw a Conclusion

6. Let’s see how this works… OBSERVATION: OBSERVATION: Flamingos are pink. Flamingos are pink. QUESTION: QUESTION: Why are they pink? Or how did they become pink? Why are they pink? Or how did they become pink?

7. Hypothesis After scientists ask a question they reword it into a hypothesis, or a statement that is the possible answer to the question. After scientists ask a question they reword it into a hypothesis, or a statement that is the possible answer to the question. A hypothesis must be TESTABLE A hypothesis must be TESTABLE

8. Writing a Hypothesis 09.04.2008 Definition-Hypothesis – statement that is possible answer to ? - MUST BE TESTABLE

9. Let’s see how this works… OBSERVATION: OBSERVATION: Flamingos are pink. Flamingos are pink. QUESTION: QUESTION: Why are they pink? Or how did they become pink? Why are they pink? Or how did they become pink? Any ideas? Any ideas?

10. Form a hypothesis As a flamingo eats a certain colored fish, it becomes that color. As a flamingo eats a certain colored fish, it becomes that color.

11. Hypothesis Parts As a flamingo eats a certain colored fish, it becomes that color. As a flamingo eats a certain colored fish, it becomes that color. What are these two parts to the hypothesis?

12. Hypothesis Parts As a flamingo eats a certain colored fish, it becomes that color. As a flamingo eats a certain colored fish, it becomes that color. Independent & Dependent Variables!

13. Writing a Hypothesis 09.04.2008 Definition Parts - Hypothesis – statement that is possible answer to ? - MUST BE TESTABLE - Made up of independent & dependent variables

14. Hypothesis Parts As a flamingo eats a certain As a flamingo eats a certain colored fish, it becomes that color. colored fish, it becomes that color. IV DV

15. Independent Variable Review An independent variable is a variable in the experiment that the experimenter changes An independent variable is a variable in the experiment that the experimenter changes I ndependent variable is what I can change. I ndependent variable is what I can change.

16. Dependent Variable Review The dependent variable is what changes when the independent variable changes The dependent variable is what changes when the independent variable changes The this is what we measure The this is what we measure

17. Hypothesis Parts As a flamingo eats a certain As a flamingo eats a certain colored fish, it becomes that color. colored fish, it becomes that color. IV DV

18. Writing a Hypothesis 09.04.2008 Definition Parts - Hypothesis – statement that is possible answer to ? - MUST BE TESTABLE -Made up of independent & dependent variables - Example: As a flamingo eats a certain colored fish, it becomes IV that color. DV

19. As a flamingo eats a certain colored fish, it becomes that color. Can we TEST this? Can we TEST this? YES, we can test this by feeding them different colored food! YES, we can test this by feeding them different colored food!

20. Writing a Hypothesis 09.04.2008 Parts Requirements - Made up of independent & dependent variables - Example: As a flamingo eats a certain colored fish, it becomes IV that color. DV 1. Answers the ? proposed. 2. Can be tested. 3. Will have quantifiable (number) / qualifiable (description) data. 4. Supported by obs. and facts.

21. Let’s take it from the top What can we observe about the way this cat falls off the roof? What can we observe about the way this cat falls off the roof? (Answer on left page) (Answer on left page)

22. Ask a question (Left Page) How do cats land when they fall? How do cats land when they fall? Why do cats always land on all fours when they fall? Why do cats always land on all fours when they fall?

23. What’s special about a cat?? Padded paws for cushion when you walk or fall… Padded paws for cushion when you walk or fall… Low body weight Low body weight Sensitive ears for balance, so they can turn themselves right side up Sensitive ears for balance, so they can turn themselves right side up What would your hypothesis be? What would your hypothesis be?

24. Form a hypothesis (Left Page) Identify the IV & DV in the hypothesis: When a cat’s ears are uncovered as it falls, it will land upright. When a cat’s ears are uncovered as it falls, it will land upright.

25. Form a hypothesis (Left Page) When a cat’s ears are uncovered (IV) as it falls, it will land upright (DV). When a cat’s ears are uncovered (IV) as it falls, it will land upright (DV).

26. Does it meet the requirements for a hypothesis? Answers the ? Proposed? Answers the ? Proposed? Can be tested? Can be tested? Will have quantifiable (number) or qualifiable (description) data? Will have quantifiable (number) or qualifiable (description) data? Supported by observations and facts already known? Supported by observations and facts already known?

27. Does it meet the requirements for a hypothesis? Answers the ? Proposed? YES Answers the ? Proposed? YES Can be tested? YES Can be tested? YES Will have quantifiable (number) or qualifiable (description) data? YES Will have quantifiable (number) or qualifiable (description) data? YES Supported by observations and facts already known? YES Supported by observations and facts already known? YES

28. SUMMARY & PRACTICE Take 3 minutes to write your summary below your notes. Take 3 minutes to write your summary below your notes. When done, begin working on the hypothesis writing practice! When done, begin working on the hypothesis writing practice!

29. General Science – Thurs, 09.04.2008 REMINDERS -HW Packet #3 Due Friday! -Quiz #3 Friday!