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Scientific Method
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For example, suppose you want to figure out the fastest route to walk home from school.

You will try several different routes and time how long it takes you to get home by each one.

Since you are only interested in finding a route that is fastest for you, you will do the walking yourself.

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What are the Variables in Your Experiment?

What are the Variables in Your Experiment?

Varying the route is the independent variable

The time it takes is the dependent variable

Keeping the same walker throughout makes the walker a control variable.

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One more thing… it is best to make several trials with each independent variable.

One more thing… it is best to make several trials with each independent variable.

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Valid Experiments

Valid Experiments

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Remember: To be a Valid Experiment:

Remember: To be a Valid Experiment:

Two groups are required --- the control & experimental groups

There should be only one variable

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Data

Data

Results of the experiment

May be quantitative (numbers) or qualitative

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Data

Data

Must be organized

Can be organized into charts, tables, or graphs

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Conclusion

Conclusion

The answer to the hypothesis based on the data obtained from the experiment

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Retest

Retest

In order to verify the results, experiments must be retested.

Slide 24

Review

Review

Slide 25

Solving a Problem

Solving a Problem

1)Identify a Problem

2) State Observations about the problem

3) Form a Hypothesis about the problem (if…then…)

4) Design an Experiment to test the hypothesis

5) Collect Data

6) Form a Conclusion

7) Retest

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