UW CHEM 110 - Chem 110 Lecture 1 RELATIONSHIPS scientific method (7 pages)

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Chem 110 Lecture 1 RELATIONSHIPS scientific method



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Chem 110 Lecture 1 RELATIONSHIPS scientific method

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Pages:
7
School:
University of Washington
Course:
Chem 110 - Introduction to General Chemistry

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9 25 2013 Watch before Fri Sept 27 Lecture 1 Relationships Scientific Method 1 3 4 Chemistry in Focus essay on pp 6 7 Questions we ll answer in this lecture How do scientists think Hint they think just like you do How is your natural method of problem solving similar to the scientific method The Scientific Method A process by which an understanding of the natural world is obtained 1 Make an observation 2 Propose a hypothesis a possible explanation for the observation 3 Perform an experiment to test the hypothesis Repetition of the steps can produce Laws and Theories A law is a distillation of repeated observations e g the law of gravity A theory is an explanation of an observed phenomenon a theory posits a mechanism for the observed behavior 1 9 25 2013 Is there a treat in this for me We will explore the scientific method using a story about my dog Betsy OMG I feel sooooo sick Primary Observation One day I came home to find that Betsy had vomited copiously and the vomit was dark brown Other Observations Easter had occurred about two weeks prior to the vomit event My step daughter Samantha had a treasure trove of chocolate Easter candy in her bedroom The chemical theobromine in chocolate makes dogs sick Betsy loves chocolate 2 9 25 2013 Ugh let me just sleep it off Hypothesis Betsy ate some of Samantha s Easter chocolate which made her sick Experiment If Betsy ate some of Samantha s chocolate I should find the remnants of chocolate wrappers in Samantha s room where she stored her candy Experimental Observation In Samantha s room I found the remnants of a box that had previously contained about half a pound of dark Belgian chocolate Also recall that the vomit was dark brown just like the chocolate This result is consistent with the hypothesis Have we proved that Betsy ate the chocolate and that it made her sick No but the results are consistent with the hypothesis 3 9 25 2013 It was totally worth it Possible Future Experiments Give Betsy a similar amount of the same



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