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Published byJose Sanders Modified over 2 years ago

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Problem Solving A Scientific Process

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A Scientific Process… Is Based on Observed Facts Has Repeatable Results Produces Verifiable Outcomes Is Carried Out in a Standard, Systematic Way

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Scientific Method The Standard, Systematic Way to Carry Out a Scientific Process Hypothesis (Untested Idea) Hypothesis (Untested Idea) Experiment (Test to Check Validity of Hypothesis) Experiment (Test to Check Validity of Hypothesis) Theory (Valid Explanation of Observations) Theory (Valid Explanation of Observations) Model – Simplified Theory with Assumptions Law (Summary of Key Experimental Observations) Law (Summary of Key Experimental Observations)

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The Scientific Method Experiment Theory Law Hypothesis

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Scientific Problem Solving HypothesisExperimentTheory/Law Understand Problem Concepts Propose Solution Based on Applicable Relationships Try Proposal (ie – Do the Math!) Check Results – Do they Make Sense? Document/Summarize Results

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Its All About Measurements Measurement – 3 Parts A Number or Value; Magnitude A Number or Value; Magnitude A Unit: Provides the Standard Scale A Unit: Provides the Standard Scale One of the Standard Scale – Known and Constant Eg, pound, gram, liter, newton What is Being Measured – Sometimes Very Important What is Being Measured – Sometimes Very Important

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Examples of Measurements 3.98 calories of heat 5.67 newtons force of bowling ball striking pins 10.0 liters of water 57 km/hour auto speed 7.65 gallons gasoline

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Not Measurements Objects Counted Definitions – eg. Exactly 2.54 cm = 1 inch Why Not? Counted Items and Definitions are not debatable Counted Items and Definitions are not debatable They are perfect They are perfect No perfect measurements; always error; never exact No perfect measurements; always error; never exact

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A Very Useful Technique Dimensional Analysis (aka Factor Labeling) Converting a Measurement from One Unit to Another Converting a Measurement from One Unit to Another Cutting to the Chase of a Proportion Problem Cutting to the Chase of a Proportion Problem m Unit 1 x Unit 2/Unit 1 = n Unit 2 m Unit 1 x Unit 2/Unit 1 = n Unit 2 Problem to Try – How many pounds is 583 grams? Problem to Try – How many pounds is 583 grams?

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