February 2012 Teacher's Guide Table of Contents



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February 2012 Teacher's Guide
Table of Contents



About the Guide 3

Student Questions (from the articles) 4

Answers to Student Questions 6

ChemMatters Puzzle: Chem Anagrams 11

Answers to the ChemMatters Puzzle 12

NSES Correlations 13

Anticipation Guides 14

24 Hours: Your Food on the Move! 15

Attack of the Gluten 16

Who Put Cheddar in the Cheese? 17

A Super Vision for Airport Security 18

Unwrapping the Mystery of Mummies 19

24 Hours: Your Food on the Move! 21

Attack of the Gluten 22

Who Put Cheddar in the Cheese? 23

A Super Vision for Airport Security 24

Unwrapping the Mystery of Mummies 25

24 Hours: Your Food on the Move! 26

Background Information (teacher information) 26

Connections to Chemistry Concepts (for correlation to course curriculum) 33

Possible Student Misconceptions (to aid teacher in addressing misconceptions) 33

Anticipating Student Questions (answers to questions students might ask in class) 33

In-class Activities (lesson ideas, including labs & demonstrations) 34

Out-of-class Activities and Projects (student research, class projects) 35

References (non-Web-based information sources) 35

Web sites for Additional Information (Web-based information sources) 36

Attack of the Gluten 38

Background Information (teacher information) 38

Connections to Chemistry Concepts (for correlation to course curriculum) 40

Possible Student Misconceptions (to aid teacher in addressing misconceptions) 41

Anticipating Student Questions (answers to questions students might ask in class) 41

In-class Activities (lesson ideas, including labs & demonstrations) 42

Out-of-class Activities and Projects (student research, class projects) 43

References (non-Web-based information sources) 43

Web sites for Additional Information (Web-based information sources) 44

Who Put Cheddar in the Cheese? 46

Background Information (teacher information) 46

Connections to Chemistry Concepts (for correlation to course curriculum) 51

Possible Student Misconceptions (to aid teacher in addressing misconceptions) 52

Anticipating Student Questions (answers to questions students might ask in class) 53

In-class Activities (lesson ideas, including labs & demonstrations) 53

Out-of-class Activities and Projects (student research, class projects) 54

References (non-Web-based information sources) 55

Web sites for Additional Information (Web-based information sources) 55

A Super Vision for Airport Security 58

Background Information (teacher information) 58

Connections to Chemistry Concepts (for correlation to course curriculum) 69

Possible Student Misconceptions (to aid teacher in addressing misconceptions) 70

Anticipating Student Questions (answers to questions students might ask in class) 70

In-class Activities (lesson ideas, including labs & demonstrations) 71

Out-of-class Activities and Projects (student research, class projects) 73

References (non-Web-based information sources) 73

Web sites for Additional Information (Web-based information sources) 74

Unwrapping the Mystery of Mummies 79

Background Information (teacher information) 79

Connections to Chemistry Concepts (for correlation to course curriculum) 86

Possible Student Misconceptions (to aid teacher in addressing misconceptions) 87

Anticipating Student Questions (answers to questions students might ask in class) 87

In-class Activities (lesson ideas, including labs & demonstrations) 87

Out-of-class Activities and Projects (student research, class projects) 88

References (non-Web-based information sources) 89

Web sites for Additional Information (Web-based information sources) 89

About the Guide

Teacher’s Guide editors William Bleam, Donald McKinney, Ronald Tempest, and Erica K. Jacobsen created the Teacher’s Guide article material. E-mail: bbleam@verizon.net


Susan Cooper prepared the national science education content, anticipation guides, and reading guides.
David Olney created the puzzle.

E-mail: djolney@verizon.net


Patrice Pages, ChemMatters editor, coordinated production and prepared the Microsoft Word and PDF versions of the Teacher’s Guide. E-mail: chemmatters@acs.org
Articles from past issues of ChemMatters can be accessed from a CD that is available from the American Chemical Society for $30. The CD contains all ChemMatters issues from February 1983 to April 2008.
The ChemMatters CD includes an Index that covers all issues from February 1983 to April 2008.
The ChemMatters CD can be purchased by calling 1-800-227-5558.
Purchase information can be found online at www.acs.org/chemmatters

Student Questions (from the articles)


24 Hours: Your Food on the Move!


    1. According to the article, where does digestion begin?

    2. What are the four main parts of the digestive system?

    3. What role do enzymes play in digestion?

    4. What is a chemical catalyst?

    5. What term is applied to food traveling down the esophagus?

    6. What is the primary role of stomach acid in digestion?

    7. In what part of the body is most food actually absorbed into the blood stream?



Attack of the Gluten


    1. What is celiac disease?

    2. In what foods is gluten found?

    3. Why is gluten important in the baking process?

    4. What is the function of carbon dioxide gas produced in the yeast fermentation of wheat flour?

    5. How does gluten provide the structure in raised dough?

    6. What happens when a baker “kneads” the bread dough?

    7. What is behind an allergic reaction to gluten in foods?

    8. What are the symptoms of a celiac allergic reaction?

    9. What other types of food contain gluten besides baked goods, box cereals and noodles?

    10. For gluten-sensitive people, what are the alternatives to consuming gluten?



Who Put Cheddar in the Cheese?


    1. What is curdled milk?

    2. What part of curdled milk is used to make cheese?

    3. List the components or ingredients of cheese.

    4. Why is the milk that is to be used for cheese making first warmed?

    5. What important changes in the warm milk are made by the added bacteria?

    6. Why is rennin added to the warm milk?

    7. What is the purpose of “cheddaring”?

    8. Why is salt added to the stacks of cheese slabs?

    9. What is accomplished by the process of aging cheese?

    10. How does a cow’s diet affect the taste of cheese?



A Super Vision for Airport Security


    1. List three materials detectable by X-ray devices.

    2. Describe the structure of the atom, according to the article.

    3. Name the forms of radiation cited by the article that are included in the electromagnetic spectrum.

    4. Define wavelength.

    5. How are wavelength and frequency related?

    6. How are objects detected inside closed luggage, using X-rays?

    7. So, if X-rays can “see” objects through the closed luggage, what’s the problem—why can’t the screeners easily detect all weapons, drugs, etc.?

    8. What is being done to help alleviate the problems from question 7?

    9. Explain how Ion Mobility Spectroscopy works to detect plastic explosives.

    10. What is the main drawback to using a walk-through metal detector?

    11. Why are radio waves being used in newer, people-screening detection devices?

    12. Describe the X-ray backscattering detection method.


Unwrapping the Mystery of Mummies


    1. What details can the study of mummies provide about the individuals who were mummified?

    2. Briefly describe the steps taken in creating a mummy.

    3. What chemicals are present in natron?

    4. How does natron preserve tissue?

    5. What are some of the high-tech tools used by scientists to study mummies?

    6. How can radiocarbon dating be used to determine the age of a plant or animal sample?

    7. How does an electron microscope compare to a light microscope?



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