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Scientific Method

Scientific Method. A constant search for information about the universe in which you live. What is the difference between a theory and a law?. Theory – a logical explanation of something that happens in nature; is not or cannot be proven true.

harper-buchanan
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Scientific Method

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  1. Scientific Method A constant search for information about the universe in which you live

  2. What is the difference between a theory and a law? • Theory – a logical explanation of something that happens in nature; is not or cannot be proven true • Law – name given to a theory that has been tested many times and is accepted as true

  3. The 6 Steps of the Scientific Method • State the Problem – clearly define what you want to investigate • Gather Information – research • Form a Hypothesis – make an educated guess based on information gathered • Experiment – test to prove or disprove • Record & Analyze Data – write down your observations and measurements • State Conclusion – explain your results

  4. Variables A variable is a factor that can change an experiment. Manipulated variable (independent variable) – this is the one variable that is purposely changed to test a hypothesis. Responding variable (dependent variable) – the factor that may change in response to the manipulated variable. Control – an experiment in which only one variable is manipulated at a time or no changes are taking place at all

  5. Design an Experiment What is our problem? Does air temperature affect the chirping of crickets?

  6. Gather Information • Research all aspects of crickets and any other information that you may need to know.

  7. Develop a Hypothesis I think crickets chirp ______ when the temperature is higher.

  8. Experiment • Choose the variable that you will test: temperature (manipulated or independent) • In a controlled experiment, all other factors must remain the same – type of container, type of cricket, number of crickets, thermometers, habitat etc… • What is the responding/dependent variable? The number of cricket chirps

  9. Experiment • How could your experiment be set up to test our cricket hypothesis? 150C 200C 250C We will set up containers with 3 different temperatures and record the number of chirps everyday at the same time.

  10. Collect and Interpret Data • Create a table to organize your data like facts, figures and other evidence • Graph your results to help make sense of the data • Look for patterns or trends in data

  11. Number of Chirps per Minute

  12. Draw Conclusions • Once you have gathered and interpreted the data, you can draw a conclusion and make a statement as to the results you found. • Finally, share your information with others

  13. Conclusion Cricket chirping does increase with temperature.

  14. Class Activity • In your lab groups, you will need to develop an experiment based on the scientific method. You must include all 6 areas of the scientific method to some degree. • Each lab group can choose their own topic.

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