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Scientific Method

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Scientific Method Basics

Scientific Method Basics

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  • 1. Scientific Method A blueprint for experiment success.
  • 2. What is the scientific method?
    • It is a simple method scientists use to conduct an investigation.
    • It is a way to ask & answer scientific questions by asking questions & conducting experiments.
  • 3. I. Question/Problem
    • Ask a question about something observed.
      • Why?
      • How?
      • What?
    • Question to be solved.
    • Must be about something measurable.
  • 4. II. Hypothesis
    • Educated guess about how things work.
    • Prediction
    • Use If, then statements
      • If ____ [ I do this ], then _____ [ this will happen ]
    • Focus on one variable only.
  • 5. III. Experiment
    • Tests your hypothesis.
    • Is it accepted (right) or rejected (wrong) ?
    • Change only one variable at a time.
    • Use a control or control group ( A group that has nothing done to it. Standard used for comparison in an experiment .)
    • In order for results to be valid, conduct several tests.
  • 6. III. Experiment
    • Record your data in a data table.
      • Numerical (quantitative) data organized in rows and columns
      • The specific independent variables are listed
      • • The number of trials are listed
      • Blanks are left for the data (dependent variable) to be filled in
  • 7. III. Experiment Title: Describing the Data Trial Variable 1 Variable 2 Variable 3 1 2 3 4 5 AVERAGE
  • 8. IV. Data Analysis
    • Reduce the data
      • Average (Mean)
    • Graph
      • Graph the data to look for trends & relationships.
  • 9. V. Conclusion
    • Summary of your experiment.
    • After your experiment, analyze your data to see if your hypothesis was accepted or rejected.
    • If hypothesis is rejected, g ive possible reasons for the difference between your hypothesis and the experimental results.