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

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?

Agenda Bellringer Learning Targets Scientific Method Scenario activity Review Exit Slip

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

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

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

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

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

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.

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

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

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.

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

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

Collect and analyze data

Conclusion 70g of sugar produces the largest loaf!

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

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.

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.

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?)

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.