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1-2 Using Scientific Method


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1-2 Using Scientific Method

  1. 1. Warm -up<br />Suppose you want to test which brand of floor cleaner is the best.<br />What materials would you need?<br />What procedure would you follow?<br />How would you determine which cleaner produced the best results?<br />
  2. 2. 1-2 Scientific Method<br />Describe the steps of the scientific method.<br />Apply the steps of the scientific method to real world scenarios.<br />
  3. 3. Scientific Method<br />A series of steps that scientists use answer questions and solve problems<br />A logical, organized way to solve problems.<br />
  4. 4. Steps of Scientific Method<br />State the problem – Ask questions<br />Gather information<br />Form a Hypothesis <br />Perform experiment and collect data <br />Analyze/Interpret data <br />Draw a conclusion<br />
  5. 5. Scientific Method<br />SIX<br />GREAT<br />FARMERS<br />PLANT<br />ALL<br />DAY<br />
  6. 6. Six: State the Problem<br />The scientist identifies the question or subject that he/she wishes to study<br />Clear, specific & defined<br />
  7. 7. Great: Gather Information<br />The scientist researches the subject that he/she is studying. <br />Places to do research: library, internet, encyclopedia, television, etc.<br />
  8. 8. Farmers: Form Hypothesis<br />Prediction about the outcome of an experiment<br />Proposed answer to the question<br />Usually has the words “If... Then” <br />IF I eat too much, THENI will get sick<br />
  9. 9. Plant: Perform Experiment<br />Scientists develop a way to test their hypothesis<br />Manipulated Variable: part of the experiment that can be changed or controlled<br />Responding Variable: What is measured in the experiment<br />Controlled Variable: part of the experiment that remain unchanged<br />
  10. 10. All: Analyze Data<br />Scientists compile data into charts and graphs<br />This helps make sense of the information taken from the experiment<br />
  11. 11. Day: Draw Conclusions<br />Scientist decides whether the original hypothesis was correct.<br />If the answer is “YES” then you are done<br />If the answer is “NO” then a new hypothesis is made and you repeat the experiment<br />
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  14. 14. Law vs. Theory<br />Law – a rule of nature<br /><ul><li>Answers the question “what?”</li></ul>Examples: Law of Attraction and Repulsion, Law of Universal Gravitation<br />Theory – An explanation based on repeated experimentation and observation.<br /><ul><li>Answers the question “why”</li></ul>Examples: Theory of Evolution, Atomic Theory<br />
  15. 15. Law vs. Theory<br />Theories do not become laws!!! What doesn’t replace why!<br />A theory represents everything currently known about a topic.<br />Everything known supports the theory. If anything is discovered that disproves the theory, the theory is dismissed or adapted to suit the new information.<br />A theory is “worth” much more than a “fact”!<br />
  16. 16. Conclusion<br />What is the purpose of the scientific method?<br />How does a scientific law differ from a scientific theory? <br />