Chemistry - College Prep

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Chemistry – College PrepItalics reflect 21 st Century Skills implementationCourse Title: ChemistryUnit Title: Significant Figures, Metric System, DensityScientific Inquiry, Literacy and NumeracyScientific inquiry is a thoughtful and coordinated attempt to search out, describe, explain and predictnatural phenomena.Scientific inquiry progresses through a continuous process of questioning, data collection, analysis andinterpretation.Scientific literacy includes the ability to read, write, discuss and present coherent ideas about science.Scientific literacy also includes the ability to search for and assess the relevance and credibility ofscientific information found in various print and electronic media.Scientific numeracy includes the ability to use mathematical operations and procedures to calculate,analyze and present scientific data and ideas.Haddam Killingworth High School Expectations for Student LearningThe Haddam Killingworth graduate will problem solveThe Haddam Killingworth graduate will access and analyze information.Enduring Understandings:Expressing the accuracy of a number and mathematically manipulating that number with significantfigures is vital to scientific investigationThe metric system is here to stay, is rational, and is the language of scienceThe calculation of the two varieties of errors can convey the closeness of a measured quantity to itsaccepted value.Essential Question(s)How do you determine the significant figures in a number?What do those significant figures tell you?How are the four basic operations of arithmetic reconciled with significant figures?How are significant figures used with scientific notation?How does the metric system operate?How are errors calculated? What do they mean?How is density calculated and applied in calculations?Students will know . . . .The 5 rules of significant figuresThe rules for +-,x, and divide withsignificant figures for regular numbersThe structure of scientific notation numbersincluding significant figuresThe rules for +-,x, and divide withsignificant figures for scientific notationnumbersThe basics metric units, their definitions,and their prefixes (pico- to tera-)Metric conversionsThe density equation and relatedcalculationsThe formulas for absolute and relativeRevised 2009Contributor: Jim DanielsProperty of RSD #17Students will be able to . . . .Determine the number of significant figures inany regular numberWrite/round a number given a desired certainnumber of significant figuresKnow the reasons and utilize the “perfect 5“rounding ruleKnow the reasons and utilize the column rule foradding and subtracting regular numbers withsignificant figuresKnow the reasons and utilize the count the sigfig rule for multiplying and dividing regularnumbers with significant figuresBe able to estimate the answers to regularnumber and scientific notation numbers involved4
Chemistry – College PrepItalics reflect 21 st Century Skills implementationerrors and the related calculations.with the 4 basic arithmetic operations.Self assess on the quality of their calculationsbased on those estimatesUtilize the EE or EXP key for calculator basedcalculations with scientific notation numbersKnow the three basic metric units and be able todefine the liter and gramKnow the numerical value and symbol for themetric prefixes from pico- to tera-Have a physical feeling for the size of the basicmetric units and for those units with the prefixesfrom milli- to mega-Convert among all metric units and preserve thesignificant figures while doing that.Select the correct metric basic unit and thecorrect prefix (if necessary) to measure anygiven property of any objectKnow the reasons for having both absolute andrelative errors and be able to calculate them.Solve any problem involving D = m/v includingthose with mismatched units and those withmultiple stepsPerformance Tasks/Product(s):Significant Figures Rules activity – Jigsaw cooperative learning of the 5 rules of significant figures.Grouped mostly by ability to enable the toughest rule to me understood by all members of its expertgroup.Significant Figures Activity – measuring the same object’s length with rulers of increasing accuracyDensity Lab – summarizes significant figures, lab device accuracy, basic arithmetic operations withsignificant figures, error calculation, and lab analysisIn-Class/homework problemsKey Evaluation Criteria/Rubric Titles:Is the accuracy of a number properly expressed?Are metric choices and conversions accurateAre errors correctly calculated and understood for their source?Problem solve/Access & Analyze School-wide RubricsOther Evidence:Tests:Chapter 2 testRecommended ClassworkInClass problemsRecommended HomeworkChapter 2 syllabus with 29 assignmentsStudent Self Assessment:Students are taught to self assess numerical answers for appropriate size and unitsExcel spreadsheet for density lab provides immediate, at home opportunities to fine tune theirRevised 2009Contributor: Jim DanielsProperty of RSD #175
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Chemistry - College Prep

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