December 2006 Teacher's Guide About the Guide...............................................................................................................................3 Student Questions .........................................................................................................................4 Answers to Student Questions.............................................................................................5 Puzzle: Chemistry Drop-outs .................................................................................................7 Answers to Puzzle: Chemistry Drop-outs ....................................................................8 Content Reading Guide ......................................................................................................................9 National Science Education Content Standard Addressed.......................................................................9 Anticipation Guides ...........................................................................................................................10 Corn-the A’maiz’ing Grain .......................................................................................................................10 Sticky Situations: the Wonders of Glue...................................................................................................11 Unusual Sunken Treasure.......................................................................................................................12 Thermometers .........................................................................................................................................13 The Race for Iodine.................................................................................................................................14 ChemMatters December 2006 Reading Strategies ...............................................................15 Corn—The A”maiz”ing Grain...................................................................................................................16 Sticky Situations: The Wonders of Glue..................................................................................................17 Unusual Sunken Treasure.......................................................................................................................18 Thermometers .........................................................................................................................................19 The Race for Iodine.................................................................................................................................20 Corn-the A’maiz’ing Grain...............................................................................................................21 Background Information ..........................................................................................................................21 Connections to Chemistry Concepts .......................................................................................................25 Possible Student Misconceptions............................................................................................................26 Demonstrations and Lessons..................................................................................................................27 Suggestions for Student Projects ............................................................................................................27 Anticipating Student Questions ...............................................................................................................28 Websites for additional Information .........................................................................................................29 Sticky Situations: The Wonders of Glue...................................................................................31 Background Information ..........................................................................................................................31 Connections to Chemistry Concepts .......................................................................................................36 Possible Student Misconceptions............................................................................................................36 Demonstrations and Lessons..................................................................................................................36 Student Projects ......................................................................................................................................37 Anticipating Student Questions ...............................................................................................................37 Websites for additional Information .........................................................................................................37 Unusual Sunken Treasure...............................................................................................................39 Background Information ..........................................................................................................................39 Connections to Chemistry Concepts .......................................................................................................41 Possible Student Misconceptions............................................................................................................42 Demonstrations and Lessons..................................................................................................................42 Student Projects ......................................................................................................................................43 Anticipating Student Questions ...............................................................................................................44 Websites for Additional Information.........................................................................................................44 Thermometers ......................................................................................................................................45 Background Information ..........................................................................................................................45 Connections to Chemistry Concepts .......................................................................................................51 1 Possible Student Misconceptions............................................................................................................51 Demonstrations and Lessons..................................................................................................................52 Suggestions for Student Projects ............................................................................................................53 Anticipating Student Questions ...............................................................................................................53 Websites for additional Information .........................................................................................................53 The Race for Iodine ............................................................................................................................56 Background Information ..........................................................................................................................56 Connections to Chemistry Concepts .......................................................................................................61 Possible Student Misconceptions............................................................................................................61 Demonstrations and Lessons..................................................................................................................61 Student Projects ......................................................................................................................................62 Anticipating Student Questions ...............................................................................................................62 Websites for additional Information .........................................................................................................63 2 About the Guide William Bleam, Donald McKinney, Mark Michalovic, and Ronald Tempest, TG Editors, created the teacher’s guide article material. [email protected] Susan Cooper prepared the national science education content, anticipation, and reading guides. [email protected] Terri Taylor, CM Administrative Editor, and Carl Heltzel, Editor, coordinated production and prepared the MS Word and PDF versions of the Guide. [email protected] David Olney created the puzzle. [email protected] NOTE: articles from past issues of ChemMatters can be accessed from a CD that is available from the American Chemical Society for $25. The CD contains all ChemMatters issues from 1983 to 2003. The 2006 ChemMatters Print Index can be purchased for $12 and covers all issues from 1983 to 2006. Purchase information can be found online at: http://chemistry.org/chemmatters/cd3.html 3 Student Questions Corn-the A’maiz’ing Grain 1. What is the meaning of “Frankenstein” in terms of science? 2. What is meant by “Franken-food”? 3. How are gene changes made in the DNA of plants? 4. What is meant by the term “pharming”? 5. What is the difference in composition between corn syrup and