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Scientific Method What is the Scientific Method? What is the Scientific Method? –Steps to Solving a problem 1.Observe a Problem 2.Research the Problem 3.Experiment 4.Collect Data 5.Draw a Conclusion

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Define/State the Problem Based on Observations Based on Observations Include your 5 senses: Touch,smell,taste,sight,hear Include your 5 senses: Touch,smell,taste,sight,hear

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Hypothesis Educated Guess Educated Guess Based on Observations, Inferences, and Previous knowledge Based on Observations, Inferences, and Previous knowledge A hypothesis is written BEFORE the experiment! A hypothesis is written BEFORE the experiment!

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Experiment Control Group: Part of experiment that is not changed! All conditions are kept the same Control Group: Part of experiment that is not changed! All conditions are kept the same Experimental Group: All conditions kept the same except one condition! Experimental Group: All conditions kept the same except one condition!

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Experiment Variable: the 1 condition that is changed! Variable: the 1 condition that is changed! There is only 1 variable in an experiment! There is only 1 variable in an experiment!

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Data Dependant Variable: Condition that results from the independent variable. Dependant Variable: Condition that results from the independent variable. Independent Variable: The condition that is changed. Variable that affects the outcome of the experiment. Independent Variable: The condition that is changed. Variable that affects the outcome of the experiment. Example: Rainfall - month Example: Rainfall - month

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Conclusion Collect Data to prove or disprove your hypothesis. Collect Data to prove or disprove your hypothesis. Graph or Tables Graph or Tables If positive result – repeat If positive result – repeat If negative result – make new hypothesis and test over. If negative result – make new hypothesis and test over.

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Theory/Law Theory: Well tested hypothesis Theory: Well tested hypothesis Law: Fact Law: Fact When does a hypothesis become a theory? When it is proven many times. When does a hypothesis become a theory? When it is proven many times.

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Popcorn Problem Alice accidentally put the jar of popcorn kernels in the freezer. She usually keeps the kernels at room temperature. Alice observed that when she popped the frozed popcorn kernels, they seemed to pop more popcorn. Alice accidentally put the jar of popcorn kernels in the freezer. She usually keeps the kernels at room temperature. Alice observed that when she popped the frozed popcorn kernels, they seemed to pop more popcorn.

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Popcorn Problem State the problem: State the problem: Does frozen popcorn pop more? What was the observation made? What was the observation made? Frozen popcorn seemed to pop more. Form a Hypothesis: Form a Hypothesis: If you freeze popcorn then the popcorn will pop more.

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Popcorn Problem Control: Control: Popcorn at room temp. Variable Variable Popcorn in the freezer Constants: Constants: Same popcorn, same amount of time, same amount of popcorn, exp. Date, temp.

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Popcorn Problem Data: Data: Trial # of kernels room of kernels popped in freezer

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Popcorn Problem How could we show our data in picture form? How could we show our data in picture form? Dependant Variable? Dependant Variable? Amount Popped Independent Variable? Independent Variable? Frozen Popcorn

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Popcorn Problem Conclusion: Conclusion: Frozen Popcorn pops more than popcorn at room temperature!

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