Making Conversions

Making ConversionsIntroduction to MolesLearning ObjectivesContent ObjectiveYou will make complex conversions by including and canceling UNITS in calculations.Language objectiveYou will communicate opinions concerning the lesson content to the class using academic EnglishToday with Dr. Nurkel

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3Anticipation GuideWith your Research group, use table 1 to answer the questions.Do your best, but dont worry if you get stuck. Well go over them again later.Lets take 6 minutesAnticipation GuideTable 1: Conversion Factors1 carat (ct) =2.000 x 10-1 gram (g)1 ounce (oz) = 1.822 x 101 pennyweight (dwt)1 pound (lb) = 7.000 x 103 grains (gr)1 stone (st) = 4.900 x 103 scruple (s.ap)1 grain (gr) = 3.240 x 10-1 carat (ct)1 pennyweight (dwt) = 1.555 x 100 gram (g)1 scruple (s.ap) = 2.857 x 10-4 pound (lbs)

5Review: Scientific NotationScientific Notation2.015 x 10-24.576 x 10111.000 x 10-11.000 x 10109.999 x 1014

Value0.02014556814579545831310.100009645632119999512589999949125585694Review: Key VocabularyInformal DefinitionIs made up of different parts.A way of doing things that people have agreed on.How many times that you should multiply something by itself.To use a formula to write a value in a different way.To notice something. To do a procedure.

TermConsistsConventionExponentialExpressObservedOperationMaking Complex ConversionsSolving the ProblemIts all in the approach

Solving the ProblemDont be fooled, its easy to crash

Video Reference: www.youtube.com/watch?v=X8Y2F1320QISolving the ProblemAs seen in the anticipation guide, it becomes very easy to make errors during the conversion.The key to avoiding mistakes is to develop the discipline of carrying units when doing calculations!Units are multiplied, divided and otherwise treated like values.When the problem is set up correctly, units will cancel leaving the correct units.Example 1Example 2Lets say it takes 2.5 hours to go 227.5 miles, whats you speed in mph?Lets try a conversionGroup Reflection(Implication and consequence Question)Based on your experience with the Anticipation Guide and the last few slides discuss with your research group, What would be the consequence of not including units as part of conversion calculation? (3 minutes)Come to consensus with your group and choose one person to present your groups opinion. When called upon, use the sentence fragment:Our group concludes that failure to include units when making conversion calculations would result in _______"

How to set up the problemUse this Graphic Organizer to make conversions

Now, lets take the training wheels offProblem 3 from your Anticipation guideAt $0.04 per pennyweight, how much is 1.5 lbs of Starbucks coffee?

$0.041 dtw1 dtw1.555 x 100 g$17.501.5 lb2.000 x 10-1 g1 ct3.240 x 10-1 ct1 g7.000 x 103 g1 lbUse this process to make another conversion with your research groups. Try this one with your research groups0.68 ct Emeralds cost $173.40 on the wholesale market. How many lbs of emeralds are required to buy an $11899 used BMW?

($11899/BMW) x (0.68 ct emeralds/$173.40) x (1 gr/3.240 x 10-1 ct) x (1 lbs/ 7.000 x 103 gr) = 2.057 x 10-2 lbs emeralds/BMW

Parting ThoughtGroups of items may also be expressed as decimals. 6 eggs may be expressed as a half a dozen or 0.5 dozen. For our cake, how many dozen eggs are required for the recipe? (Please use scientific notation.) 2.500 x 10-1 dozen eggsWrap Up: VocabularyProvide an informal definition for each of these terms based on their use in the context of this class.ConvertDissimilarPhenomenonRatioUnits

Wrap UP: Science Speak(Viewpoint Question)Discuss with your group the most difficult concept from this lesson for 3 minutes. Agree with your group on the most difficult concept and choose one person to present your groups opinion. When called upon, use the sentence fragment. "In our opinion, the most daunting concept was determined to be_______"

Wrap UP: Reflection(Elaborating Question)Spend 5 minutes to write in your learning journal. Describe the most interesting aspect of this lesson and how this concept might be put to use in your personal life.

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