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Scientific Method

Scientific Method. Bellringer. This car will not start. 1.What are some possible reasons the car will not start? 2.How would you test your guesses?. Scientific Method. 1. Observation: Notice there is a problem or question to be answered 2. Hypothesis: Scientific Explanation

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Scientific Method

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  1. Scientific Method

  2. Bellringer • This car will not start 1.What are some possible reasons the car will not start? 2.How would you test your guesses?

  3. Scientific Method • 1. Observation: Notice there is a problem or question to be answered • 2. Hypothesis: Scientific Explanation • 3. Experiment: Test your hypothesis • 4. Data: Collect information • -5. Analyze Data • 6. Modify if needed or Communicate Results

  4. Experiment • Control: used to compare experimental results. Does not receive any experimental treatment/changes • Variable: Factor changed during experiment • Independent Variable: What is changed. Will affect the outcome of the experiment • Dependent Variable: Results of the experiment

  5. Data • Qualitative Data: Express with Description • -Quantitative Data: Express with Numbers • Display in graphs: Bar, Line, Circle • X axis: Independent Variable • Y axis: Dependent Variable

  6. Analyze Results • 1. If results are consistent with hypothesis, communicate and publish results. • 2. If results are not consistent with hypothesis, modify experiment.

  7. Conclusion • 1. Experiment must be repeatable. • 2. Theory versus Law • -Theory is subject to change as more knowledge is gained. “Theory of Evolution” • -Laws are universally accepted to be true. “Law of Gravity”

  8. Everyday Science Scientific Method in everyday • Car will not start =____________ • Out of gas? = _________________ • Adding gas and seeing if car starts = ___________________________ • Car doesn’t start = _____________ • It wasn’t out of gas = _____________________________ (disproves hypothesis this time) Tada! The Five Steps of the Scientific Method

  9. Everyday Science Scientific Method in everyday • Car will not start =Observation • Out of gas? = Hypothesis • Adding gas and seeing if car starts = Experiment • Car doesn’t start = Data/Results • It wasn’t out of gas =Conclusion/ Revise (disproves hypothesis this time)

  10. Partner Work: Write a hypothesis for each of the following research problems. Identify the dependent and independent variable for each. • 1. What effect does high temperature have on onion growth rates? • 2. What effect does light have on plant growth? • 3. What effect do different mouthwashes have on bad breath? • 4. What effect does light have on plant growth?

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