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Scientific method

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Transcript

  • 1. The Scientific Method• A series of steps used to solve a problem…• Not just a method used by scientists.It’s used by everyone all the time!
  • 2. Step #1: Observe and Question• Ex) Fall leaves change color…• What question(s) might you askyourself?
  • 3. • A hypothesis is testableexplanation.• Ex) Maple leaves changecolor when the airtemperature drops.• Written in an “If…then”format• Ex.) If the air temperaturedrops below 50 degrees,then leaves begin tochange color.
  • 4. • Part where you set up experimentsand use a bunch fancy words (variable,control, etc.).• It is important to conduct anexperiment that involves only onevariable at a time.
  • 5. • (Manipulative)Variable- factortested, what “changes”• Control group- NOTexposed variable• Experimental group-exposed variable
  • 6. • During any experiment, it is important to collectdata.• Data is information that is obtained from yourexperiment.• It does not have to be numerical data(quantitative) it can also be visual data(qualitative).• Ex) 14 degrees Celcius - 25 leaves changed22 degrees Celcius - 2 leaves changed
  • 7. Step #5 and #6: Conclude and Repeat• Review your data to make sure itsupports or refutes yourhypothesis.• If the results are not what isexpected, revise the hypothesis.• A good scientist will repeat theexperiment.• Theory- unifying explanation forMANY observations, wellsupported hypothesis.
  • 8. Review…• Steps of scientific method…1.Observe and question2.Form a hypothesis3.Test (perform an experiment)4. Collect data5.Conclude6. Repeat
  • 9. Review…• Steps of scientific method…1.Observe and question2.Form a hypothesis3.Test (perform an experiment)4. Collect data5.Conclude6. Repeat