Chemmatters Puzzle: Student Questions And Answers

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December 2007
Teacher 's Guide

About the Guide 3
Student Questions 4
Answers to Student Questions 6
ChemMatters Puzzle: DOUBLE or NOTHING 10
Answers to DOUBLE or NOTHING 11
NSES Correlation 12
Anticipation Guides 14 The Captivating Chemistry of Candles 14 Hindenburg: Formula for Disaster 16 How the Cookie Doesn’t Crumble…and Other Sweet Chemistry Secrets 17 The Solid Facts about Trans Fats 18 Beyond Hydrogen: The New Chemistry of Fuel Cells 19
Content Reading Guides 20 The Captivating Chemistry of Candles 21 Hindenburg: Formula for Disaster 22 How the Cookie Doesn’t Crumble…and Other Sweet Chemistry Secrets 23 The Solid Facts about Trans Fats 24 Beyond Hydrogen: The New Chemistry of Fuel Cells 25
The Captivating Chemistry of Candles 26
Paraffin is a compound. |
| | |4. Wax can come from animals, vegetables, or minerals. |
| | |5. Candle wicks are treated with flame-retardant solutions. |
| | |6. Paraffin wax must be in the vapor state to travel up the wick. |
| | |7. Paraffin wax may burn in the vapor, liquid, or solid state. |
| | |8. Burning paraffin wax produces carbon dioxide gas and water vapor. |
| | |9. In the hottest region of the candle flame, temperatures reach about 800 (C. |
| | |10. The bright yellow color of the candle flame is produced by glowing carbon particles. |
| | |11. Candles burn aboard the space shuttle much like they do on Earth.