1. Mr. Lambert Integrated Science 1A Trimester 1, 2014
Scientific Method
Mr. Lambert
Integrated Science 1A
Trimester 1, 2014

2. 1. Come up with a hypothesis for the following question:
Bell Ringer
1. Come up with a hypothesis for the following question:
Do wounds heal faster when they are covered by Band-Aids?
2. How could you test this?

3. Agenda Bellringer Learning Targets Scientific Method Scenario activity
Review
Exit Slip

4. Learning Targets
On your Bell Ringer Sheet, write the following: I can define important vocabulary about the Scientific Method.

5. The Scientific Method Ask a Question Make a Hypothesis
Design an Experiment
Analyze Data
Draw Conclusions

6. Observation Looking at something very closely
Example: Hmmm…the plant on the left looks like it is taller than the plant on the right.

7. Ask a question What are you curious about?
Example: Why is one plant taller than the other?

8. A prediction that can be tested using the scientific method
Form a hypothesis
A prediction that can be tested using the scientific method
Example: If I feed my plant OJ, then it will grow faster than if I feed it water

9. Design an experiment to test your hypothesis
Example: Over one month, I fed one plant only OJ and the other plant only water. After one month, I measured the height of the two plants.

10. Experiment Independent variable – what the experimenter changes
Example: The liquid I feed the plants
Dependent variable – What changes as a result of changes made in the independent variable
Example: Plant growth
Control - group that serves as the standard of comparison
Example: Feed plant water

11. Analyze results and draw conclusions
I compared the heights of the two plants, and found that the plant I fed OJ was shorter than the plant I fed water. My hypothesis was incorrect! Time to make a new hypothesis.
If my hypothesis had been correct, I would share my results

12. Using the Scientific method
Question:
John watches his grandmother bake bread. He asks his grandmother what makes the bread rise. She explains that yeast releases a gas as it feeds on sugar.
John wonders if the amount of sugar used in the recipe will affect the size of the bread loaf.

13. Using the scientific method
Independent variable?
Amount of sugar
Dependent variable?
Size of bread loaf
Hypothesis
If more sugar is added, then the bread will rise higher

14. Using the scientific method
Experiment
Bake bread using 50g, 60g, 70g, 80g, and 90g of sugar
Control
Since John’s grandmother always uses 50g of sugar when baking, that will be the control.
Constants
Bread recipe
Oven used
Cooking time

15. Collect and analyze data

16. Conclusion
70g of sugar produces the largest loaf!

17. Individually determine the following:
Scenario activity
Individually determine the following:
Hypothesis
Independent variable
Dependent variable
Experiment to test the hypothesis
Conclusion

18. Scenario #1
Krusty was told that a certain itching powder was the newest best thing on the market; it even claims to cause 50% longer lasting itches. Interested in this product, he buys the itching powder and compares it to his usual product. One test subject (A) is sprinkled with the original itching powder, and another test subject (B) was sprinkled with the Experimental itching powder. Subject A reported having itches for 30 minutes. Subject B reported to have itches for 45 minutes.

19. Scenario #2
Homer notices that his shower is covered in a strange green slime. His friend Barney tells him that coconut juice will get rid of the green slime. Homer decides to check this out by spraying half of the shower with coconut juice. He sprays 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.

20. Design your own experiment!
Look at your groups question
Answer the following on the piece of paper:
Form a hypothesis
Design an experiment to test that hypothesis
Identify independent & dependent variable
Identify control
How would your experiment show that your hypothesis is true? (or not true?)

21. Exit Slip
Does the hormone estrogen increase the milk yield of dairy cows?
Come up with a hypothesis for this questions.
Design an experiment to test your hypothesis.