Scale Drawing Blowing Up A Candy Bar / Comic Strip

Name:Date:Scale DrawingBlowing up a Candy Bar / Comic StripStandards:[ Standards for Mathematical Practice2. Reason abstractly and quantitatively4. Model with mathematics.5. Use appropriate tools strategically.] Common Core Mathematical Content Standards7.G.A.1 – Solve problems involving scale drawings of geometric figures,including computing actual lengths and areas from a scale drawing andreproducing a scale drawing at a different scale.Information: We have learned about Scale Drawings, such as maps, scientificDNA, and blueprints. We have also learned that these Scale Drawings arebased on a Scale Factor. If the scale factor is less than one, the size ofan object or a number is being decreased (reduced). If the scale factor isgreater than one, the size of an object or a number is being increased(enlarged/dilated).Overview of Project: You are going to enlarge (dilate) a candy bar or comicstrip so that you can find the scale factor between a regular candy bar/comicstrip and an enlarged candy bar/comic strip.Sample enlargement scaling of imagePage 1 of 6

Steps:1. Take your empty candy bar wrapper OR choose ONE frame of the comicstrip to cut out and to enlarge for your scale drawing.2. Construct a grid by measuring quarter inch (1/4) squares along the widthand length of the candy bar/original comic strip. Use a RULER! For help, youcan tape your candy bar/comic strip to 1/4 inch grid paper and continue thelines. (Keep this!)3. Determine your SCALE FACTOR for the enlargement (page 3). Visit TeamStraus and watch the ‘Math Snacks: Scale Ella’ video to remind yourself aboutscale drawings and scale factor if you need to.4. Draw grid lines (in pencil) on 8.5 x 11 inch paper if that works with yourscale factor OR use rolled white chart paper if your scale factor is too big forregular paper. Use a RULER!5. Copy each box of the candy bar/comic striponto your enlargement paper.6. Outline everything in black marker and eraseany stray pencil marks and the gridlines.7. Color the candy bar/comic strip the same asthe original.8. Complete the MEASUREMENTS and REFLECTIONS page on page 3-5 toshow your learning.9. Determine your SCALE for your scale drawing. Write the SCALE andSCALE FACTOR on the graph paper in the bottom corner.Page 2 of 6

Name:Date:Scale Drawing of Candy Bar/Comic Strip MEASUREMENTS:Scale Used: (e.g. 1 inch 3 feet)Candy Bar/ComicStripInformationOriginal SizeEnlarged SizeWork (showproportions)LengthWidthWhat is the SCALE FACTOR that you used? {show all calculations}Scale Factor:Page 3 of 6

EXTENSION (BONUS FOR CANDY BAR SELECTION):1. Copy the nutritional information from your original candy bar to the tablebelow in the “Original Size” column.2. Calculate the nutritional values of your enlarged candy bar in directproportion to the original candy bar and record below.Candy BarInformationOriginal SizeScale FactorEnlarged SizeCaloriesTotal FatCholesterolSodiumTotalCarbohydratesProteinPage 4 of 6

Name:Date:Write About Your Strategies: Using complete sentences, describe the mathyou used to solve this project:Page 5 of 6

Evaluation:1234Using ProportionsFails to useproportions to showchange of scaleSet up proportionsthat are incorrect forscale drawingCorrectly set upproportions for scaledrawing with 1-2minor errors.Correctly set upproportions for scaledrawingUsing Cross Productsor Equal RatiosFails to use crossproducts or equalratios to solveproportions.Use cross products orequal ratios to solveproportions.Reasonably use crossproducts orequal ratios to solveproportions?More than 5 errorsand/ or missing work.Contains 3-5 errorsOnly 1-2 minor errorsDemonstrate theability to use crossproducts or equalratios efficiently andaccurately to solveproportions.No errors incalculations.Scale DrawingScale is not includedor unrealistic.Includes a scale fordrawing or model.Chose an acceptablescale for drawing ormodel.Chose an appropriatescale for drawing ormodel.Calculations includemany errors. Noeffort to round tonearest tenth.Includes allcalculations and anattempt to round.Several errors incalculations androunding.Includes accuratecalculations androunding with a coupleof minor errors.Includes accurateand completecalculations.Correctly roundedmeasurements tonearest tenth.ConceptualUnderstanding(REELECTION)Describes strategiesfor setting up andsolving proportionsthat shows little to nounderstanding of theconceptsDescribes strategiesfor setting up andsolving proportionsthat shows someunderstanding ofthe conceptsDescribes strategiesfor setting up andsolving proportionsthat show a goodunderstanding of theconceptsDescribes strategiesfor setting up andsolving proportionsthat show a strongunderstanding of theconceptsDrawingPresentationLacks bothorganization andrequired information.Lacks someorganization butincludes most of therequired information.Organized drawingwith all requiredinformation.Creative, neat, andorganized drawingwith all requiredinformation.Drawing very messy.Drawing could beimproved.Overall appearance isgood.Overall appearance isexcellent.Overall Level:Remember:-use your notebook/notes for help when completing this assignment-this assignment is worth 20 points in the tests/assignments/projectscategory (that’s equal to a test!)-this assignment is DUE: Tues. June 3Page 6 of 6

1 4"Grid Paper

7.G.A.1 – Solve problems involving scale drawings of geometric figures, including computing actual lengths and areas from a scale drawing and reproducing a scale drawing at a different scale. Information: We have learned about Scale Drawings, such as maps, scientific DNA, and bluep