PROBLEM SOLVING PROBLEM SOLVING IN SCIENCEIN SCIENCE

PROBLEM SOLVING PROBLEM SOLVING STRATEGIESSTRATEGIES

1.1. Identify the known facts.Identify the known facts.

2.2. Define the answer required.Define the answer required.

3.3. Develop possible solutions.Develop possible solutions.

4.4. Analyze these solutions and choose the Analyze these solutions and choose the correct one.correct one.

5.5. Develop the individual steps to arrive at Develop the individual steps to arrive at the answer.the answer.

6.6. Solve the problem.Solve the problem.

7.7. Evaluate the results.Evaluate the results.

Problem Solving – The Factor Problem Solving – The Factor Label MethodLabel Method

This method of problem solving treats the This method of problem solving treats the units as factors.units as factors.

As with common factors, these labels may As with common factors, these labels may be divided out.be divided out.

The problem solution must have the The problem solution must have the correct unit label.correct unit label.

This method provides a “check” on This method provides a “check” on mathematical operations. mathematical operations.

The individual conversion factors ( ratios The individual conversion factors ( ratios whose value is equivalent to one ) may whose value is equivalent to one ) may usually be written by inspection. usually be written by inspection.

The Three Parts of a ProblemThe Three Parts of a Problem

1.1. A Known BeginningA Known Beginning GivenGiven

2.2. A Desired EndA Desired End FindFind

3.3. A Connecting path or conversion A Connecting path or conversion methodmethod

FactorFactor

SIMPLE UNIT CONVERSIONSSIMPLE UNIT CONVERSIONS

Given: 0.143 hoursGiven: 0.143 hours Find: secondsFind: seconds Factors:Factors:

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Simple Unit ConversionsSimple Unit Conversions

Given: 0.84 m Given: 0.84 m Find: cmFind: cm Factors:Factors:

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Simple Unit Conversions Simple Unit Conversions

Given: 31.5 cgGiven: 31.5 cg Find: mgFind: mg Factors:Factors:

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Simple Unit ConversionsSimple Unit Conversions

Given: 65.22 mgGiven: 65.22 mg Find: gFind: g Factors: Factors:

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Simple Unit ConversionsSimple Unit Conversions

Given: 718 nmGiven: 718 nm Find: cmFind: cm Factor:Factor:

Derived Unit ConversionDerived Unit ConversionProblemsProblems

Given: 0.436 mGiven: 0.436 m33

Find: cmFind: cm33

Factors:Factors:

Derived Unit ConversionDerived Unit ConversionProblemsProblems

Given: 0.693 dmGiven: 0.693 dm33

Find: cmFind: cm33

Factors:Factors:

Derived Unit ConversionDerived Unit ConversionProblemsProblems

Given: 9.06 km/hGiven: 9.06 km/h Find: m/minFind: m/min Factors:Factors:

Derived Units Derived Units

Given: 3.5 m/sGiven: 3.5 m/s Find: cm/sFind: cm/s Factors:Factors:

Derived UnitsDerived Units

Given: 1.352 km/hGiven: 1.352 km/h Find: mm/sFind: mm/s Factors:Factors: