Scientific Method

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An introduction to Scientific Method

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Scientific Method

  1. 1. Scientific Method
  2. 2. What is the Scientific Method? <ul><li>It is a process that is used to find answers to questions about the world around us. </li></ul>
  3. 3. Is there only one “scientific method”? <ul><li>NO!  there are several versions </li></ul><ul><li>Some versions have more steps while others may have only a few. </li></ul><ul><li>All begin with the identification of a problem or a question to be answered based on observations around us and provide an organized method for conducting and analyzing an experiment. </li></ul>
  4. 4. What is a Hypothesis? <ul><li>An educated guess based on observations and your knowledge of the topic. </li></ul>
  5. 5. What is Data? <ul><li>Information gathered during an experiment. </li></ul>
  6. 6. Steps 1 and 2 <ul><li>1. Identify the Problem </li></ul><ul><li>2. Form a Hypothesis </li></ul>
  7. 7. Steps 3 and 4 <ul><li>3. Create an Experiment </li></ul><ul><li>4. Perform an Experiment </li></ul><ul><li>Parts of an Experiment : </li></ul><ul><li>independent variable </li></ul><ul><ul><li>The variable changed </li></ul></ul><ul><li>dependent variable </li></ul><ul><ul><li>The variable that reacts because of the change </li></ul></ul><ul><li>Control </li></ul><ul><ul><li>Used as a standard of comparison </li></ul></ul><ul><li>Trials (minimum is 3) </li></ul><ul><ul><li>Repeated experiments </li></ul></ul>
  8. 8. Steps 5 and 6 <ul><li>5. Analyze the Data </li></ul><ul><li>6. Make Conclusions  Communicate Results </li></ul>
  9. 9. Modify the Experiment (when data is inaccurate or experiment is flawed)
  10. 10. Hypothesis vs. Theory vs. Law <ul><li>Hypothesis : possible answer to a question </li></ul><ul><li>Theory : a hypothesis that has been tested and supported many times. They serve as a basis for describing patterns that we observe in nature. </li></ul><ul><ul><li>Example : The Big Bang Theory </li></ul></ul><ul><li>Law : a general statement that describes some pattern in nature. The statement must hold under the specified conditions without exception. </li></ul><ul><ul><li>Example : The Law of Gravity </li></ul></ul>

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