WebQuest--The+Case+of+the+Golden+Crown

THE CASE OF THE GOLDEN CROWN

 __Introduction:__

It is the Bronze Age, about 250 BC (2,260 years ago), in Syracuse, Sicily (Italy). His Majesty Hiero II has offered a large cash reward for his recently stolen crown.  (What a tragedy!) Five citizens have come forth and brought to him five identical crowns. The King has heard rumors that only one of the five crowns is in fact his crown of pure gold! The other four might have been made of different metals! How will the crown of pure gold be identified?

 __Task:__

You and your partner have been summoned by the King Hiero II to scientifically determine which crown is the real, pure gold crown. Since the crown is considered a holy object you are not to physically change it in any way. It is up to you two intelligent scientists to figure this mystery out carefully, because the four lying goldsmiths might very well lose their heads!



__Process/Resources:__

Using the property of matter—density—you will identify which of the five crowns is the “real” one. Density is a property of matter which allows us to identify the substance that makes up that matter, because the density of a particular kind of matter is a specific property to that kind of matter. The density of an object can be calculated by dividing the mass (in grams) of a substance by its volume (cm3). By referring to a density chart, a person can determine the identity of a substance. //__How to solve this mystery:__//
 * 1) Review the concept of density at **this web site** and **this web site****.**
 * 2) Both you and your partner need to complete the [|Science Journal Document] to organize the following data about the 5 crowns in your notebook:
 * 3)  **All of the crowns are identical** and have a **volume of 180** **cm 3 **
 * 4)  **The 5 crowns have the following different masses**
 * **1943 g**
 * **515 g**
 * **1440 g**
 * **3474 g**
 * <span style="font-family: 'Palatino Linotype','Book Antiqua',Palatino,serif; font-size: 110%;">**2467 g**
 * 1) <span style="font-family: 'Palatino Linotype','Book Antiqua',Palatino,serif; font-size: 110%;">Calculate the density for each crown using the formula: density = mass ÷ volume
 * 2) <span style="font-family: 'Palatino Linotype','Book Antiqua',Palatino,serif; font-size: 110%;">Record the density for each crown in the chart.
 * 3) <span style="font-family: 'Palatino Linotype','Book Antiqua',Palatino,serif; font-size: 110%;">Be certain that your chart contains complete headings for each column. Include the unit of measurement for mass, volume, and density.
 * 4) <span style="font-family: 'Palatino Linotype','Book Antiqua',Palatino,serif; font-size: 110%;">Examine the chart "**Density of Common Substances**."
 * 5) <span style="font-family: 'Palatino Linotype','Book Antiqua',Palatino,serif; font-size: 110%;">Both you and your partner need to answer the questions from the [|Science Journal Document]<span style="font-family: 'Palatino Linotype','Book Antiqua',Palatino,serif; font-size: 110%;">.
 * 6) <span style="font-family: 'Palatino Linotype','Book Antiqua',Palatino,serif; font-size: 121%;">Summarize your findings in a 1-page, double-spaced handwritten letter (computers didn’t exist in 250 BC) persuading the king that you have correctly identified the real gold crown using scientifically accurate information. Be sure to use supporting evidence from your density calculations and the table "** Density of Common Substances ** ."

<span style="font-family: 'Palatino Linotype','Book Antiqua',Palatino,serif; font-size: 110%;">__<span style="font-family: 'Palatino Linotype','Book Antiqua',Palatino,serif; font-size: 110%;">Evaluation: __ || <span style="display: block; font-family: 'Palatino Linotype','Book Antiqua',Palatino,serif; font-size: 96.8%; text-align: center;">Chart not complete || || <span style="display: block; font-family: 'Palatino Linotype','Book Antiqua',Palatino,serif; font-size: 96.8%; text-align: center;">Questions were not answered ||
 * ~  ||~ <span style="display: block; font-family: 'Palatino Linotype','Book Antiqua',Palatino,serif; font-size: 80%; text-align: center;">**15 Points** ||~ <span style="display: block; font-family: 'Palatino Linotype','Book Antiqua',Palatino,serif; font-size: 80%; text-align: center;">**12 Points** ||~ <span style="display: block; font-family: 'Palatino Linotype','Book Antiqua',Palatino,serif; font-size: 80%; text-align: center;">**9 Points** ||~ <span style="display: block; font-family: 'Palatino Linotype','Book Antiqua',Palatino,serif; font-size: 80%; text-align: center;">**6 Points** ||~ <span style="display: block; font-family: 'Palatino Linotype','Book Antiqua',Palatino,serif; font-size: 80%; text-align: center;">**No Credit** ||
 * ~ <span style="font-family: 'Palatino Linotype','Book Antiqua',Palatino,serif; font-size: 80%;">**Student constructs and completes information chart attachment** || <span style="display: block; font-family: 'Palatino Linotype','Book Antiqua',Palatino,serif; font-size: 80%; text-align: center;">Chart has a title, labels for rows and column, correct units of measurement, and density correctly calculated || <span style="display: block; font-family: 'Palatino Linotype','Book Antiqua',Palatino,serif; font-size: 80%; text-align: center;">3 out of 4 exemplary elements with a good understanding of the task || <span style="display: block; font-family: 'Palatino Linotype','Book Antiqua',Palatino,serif; font-size: 80%; text-align: center;">2 or 3 exemplary elements with a basic understanding of the task || <span style="display: block; font-family: 'Palatino Linotype','Book Antiqua',Palatino,serif; font-size: 80%; text-align: center;"> 1 or 2 exemplary elements with some understanding of the task
 * ~ <span style="display: block; font-family: 'Palatino Linotype','Book Antiqua',Palatino,serif; font-size: 80%; text-align: center;">** Student provides answers to questions from information chart attachment ** || <span style="display: block; font-family: 'Palatino Linotype','Book Antiqua',Palatino,serif; font-size: 80%; text-align: center;">Answers to questions indicate student, has a full and complete understanding of concept of density || <span style="display: block; font-family: 'Palatino Linotype','Book Antiqua',Palatino,serif; font-size: 80%; text-align: center;">Answers to questions indicate student has a good understanding of the concept of density || <span style="display: block; font-family: 'Palatino Linotype','Book Antiqua',Palatino,serif; font-size: 80%; text-align: center;">Answers to questions indicate student has a basic understanding of the concept of density || <span style="display: block; font-family: 'Palatino Linotype','Book Antiqua',Palatino,serif; font-size: 80%; text-align: center;"> Answers to questions indicate student has little understanding of the concept of density
 * ~ <span style="display: block; font-family: 'Palatino Linotype','Book Antiqua',Palatino,serif; font-size: 80%; text-align: center;">**Creativity/ Presentation for persuasive letter **
 * using scientific information ** || <span style="color: black; display: block; font-family: 'Palatino Linotype','Book Antiqua',Palatino,serif; font-size: 9pt; text-align: center;">Student, using analysis, has a full and complete response which cites the definition of density, the mathematical calculations, reference to the chart "Density of common substances", in a coherent logical presentation of evidence || <span style="color: black; display: block; font-family: 'Palatino Linotype','Book Antiqua',Palatino,serif; font-size: 9pt; text-align: center;">Student, using analysis, cites 2 or 3 elements of supporting evidence which shows a good understanding of the task/problem || <span style="color: black; display: block; font-family: 'Palatino Linotype','Book Antiqua',Palatino,serif; font-size: 9pt; text-align: center;">Student cites 2 or 3 elements of supporting evidence for persuasion which show a basic understanding of the task/problem || <span style="color: black; display: block; font-family: 'Palatino Linotype','Book Antiqua',Palatino,serif; font-size: 9pt; text-align: center;">Student cites 1 or 2 elements of supporting evidence for persuasion which show little understanding of the task/problem || <span style="display: block; font-family: 'Palatino Linotype','Book Antiqua',Palatino,serif; font-size: 102.96%; text-align: center;">No written letter ||
 * ~ <span style="display: block; font-family: 'Palatino Linotype','Book Antiqua',Palatino,serif; font-size: 80%; text-align: center;">**Grammar/ Spelling overall** || <span style="display: block; font-family: 'Palatino Linotype','Book Antiqua',Palatino,serif; font-size: 96%; text-align: center;">No grammar or spelling errors || <span style="display: block; font-family: 'Palatino Linotype','Book Antiqua',Palatino,serif; font-size: 96%; text-align: center;">Few grammar or spelling errors || <span style="display: block; font-family: 'Palatino Linotype','Book Antiqua',Palatino,serif; font-size: 96%; text-align: center;">Some grammar or spelling errors || <span style="display: block; font-family: 'Palatino Linotype','Book Antiqua',Palatino,serif; font-size: 96%; text-align: center;">Many grammar or spelling errors || <span style="display: block; font-family: 'Palatino Linotype','Book Antiqua',Palatino,serif; font-size: 96%; text-align: center;">Indecipherable writing; too many errors ||
 * ~ <span style="display: block; font-family: 'Palatino Linotype','Book Antiqua',Palatino,serif; font-size: 80%; text-align: right;">TOTAL ||  ||   ||   ||   ||   ||


 * <span style="font-family: 'Palatino Linotype','Book Antiqua',Palatino,serif; font-size: 110%;">Score = **/**60 ||

<span style="font-family: 'Palatino Linotype','Book Antiqua',Palatino,serif; font-size: 110%;">__Conclusion:__

By successfully completing this WebQuest, you have learned how to use density, a property of matter, to identify the contents of an object. Eureka!



Now you can read about "Archimedes and the Golden Crown."

__<span style="font-family: 'Palatino Linotype','Book Antiqua',Palatino,serif; font-size: 110%;">Teacher info: __

<span style="font-family: 'Palatino Linotype','Book Antiqua',Palatino,serif;">// Credits & References // <span style="color: black; font-family: 'Palatino Linotype','Book Antiqua',Palatino,serif;">1. Adapted from: <span style="font-family: 'Palatino Linotype','Book Antiqua',Palatino,serif;">Johnson, Barbara A. "WebQuest." //Chimacum Middle School//. 15 Aug. 1999. <@http://eagle.csd49.org/classpages/density_crown_webq.html>. <span style="color: black; font-family: 'Palatino Linotype','Book Antiqua',Palatino,serif;">2. Prentice Hall __Matter: Building Blocks of the Universe,__ New Jersey 1997. 3. www.mcs.drexel.edu~crorres/Archimedes/crown/CrownIntro.htm <span style="font-family: 'Palatino Linotype','Book Antiqua',Palatino,serif;">4. <span style="color: black; font-family: 'Palatino Linotype','Book Antiqua',Palatino,serif;">www.cwis.nyu.edu/pages/mathmol/modules/water/density-intro.htm <span style="font-family: 'Palatino Linotype','Book Antiqua',Palatino,serif;">5. <span style="color: black; font-family: 'Palatino Linotype','Book Antiqua',Palatino,serif;">www.cs.drexel.edu/~crorres/Archimedes/Crown/CrownIntro.html