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SNOWFLAKES Nano at its coolest!
What do you  know   about snow?
What do you  wonder   about snow?
Outline <ul><li>When does it snow? </li></ul><ul><li>Why do snowflakes have six sides? </li></ul><ul><li>Is every snowflak...
When does it snow?
It snows when… <ul><li>It’s  cold  (below freezing) </li></ul><ul><li>It’s  cloudy  (water vapor in the air) </li></ul>
 
 
Why do snowflakes have six sides?
Nano is very, very small <ul><li>A nanometer is a  billionth  of a meter. </li></ul><ul><li>Molecules  are nanometers acro...
Snowflakes are nano! <ul><li>Nanoscience is  nature  and technology. </li></ul><ul><li>Water  molecules  form ice crystals...
Shape is determined by molecular structure Basic shapes of snowflakes Molecular structure  of ice crystals
Is every snowflake different?
Snowflakes have many shapes
Type depends on  temperature and humidity
 
 
 
 
Snowflakes self-assemble <ul><li>Molecules and cells  form  themselves into  structures … </li></ul><ul><li>… under the ri...
Snowflakes and nano,  in the future New ways to build tiny, nano-sized structures
Snowflakes and nano,  right now! Ice crystals self-assemble inside the museum
Review <ul><li>When does it snow? </li></ul><ul><ul><li>Cold, cloudy conditions </li></ul></ul><ul><li>Why do snowflakes h...
Image sources Courtesy of Kenneth Libbrecht, www.snowcrystals.com
Image sources  (continued) iStockphoto.com Courtesy of NOAA National Weather Service Collection Courtesy of NASA Marshall ...
This project was supported by the National Science Foundation under Grant No. ESI-0532536.  Any opinions, findings, and co...
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Snowflake Final 07 Aug08 Mk

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A Powerpoint presentation for the Nanoscience Snowflake program on NISEnet.org

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Snowflake Final 07 Aug08 Mk

  1. 1. SNOWFLAKES Nano at its coolest!
  2. 2. What do you know about snow?
  3. 3. What do you wonder about snow?
  4. 4. Outline <ul><li>When does it snow? </li></ul><ul><li>Why do snowflakes have six sides? </li></ul><ul><li>Is every snowflake different? </li></ul>
  5. 5. When does it snow?
  6. 6. It snows when… <ul><li>It’s cold (below freezing) </li></ul><ul><li>It’s cloudy (water vapor in the air) </li></ul>
  7. 9. Why do snowflakes have six sides?
  8. 10. Nano is very, very small <ul><li>A nanometer is a billionth of a meter. </li></ul><ul><li>Molecules are nanometers across. </li></ul>
  9. 11. Snowflakes are nano! <ul><li>Nanoscience is nature and technology. </li></ul><ul><li>Water molecules form ice crystals . </li></ul>
  10. 12. Shape is determined by molecular structure Basic shapes of snowflakes Molecular structure of ice crystals
  11. 13. Is every snowflake different?
  12. 14. Snowflakes have many shapes
  13. 15. Type depends on temperature and humidity
  14. 20. Snowflakes self-assemble <ul><li>Molecules and cells form themselves into structures … </li></ul><ul><li>… under the right conditions, with the right raw materials. </li></ul>
  15. 21. Snowflakes and nano, in the future New ways to build tiny, nano-sized structures
  16. 22. Snowflakes and nano, right now! Ice crystals self-assemble inside the museum
  17. 23. Review <ul><li>When does it snow? </li></ul><ul><ul><li>Cold, cloudy conditions </li></ul></ul><ul><li>Why do snowflakes have six sides? </li></ul><ul><ul><li>Molecular structure of ice crystals </li></ul></ul><ul><li>Is every snowflake different? </li></ul><ul><ul><li>Temperature and humidity </li></ul></ul>
  18. 24. Image sources Courtesy of Kenneth Libbrecht, www.snowcrystals.com
  19. 25. Image sources (continued) iStockphoto.com Courtesy of NOAA National Weather Service Collection Courtesy of NASA Marshall Space Flight Center Courtesy of IBM
  20. 26. This project was supported by the National Science Foundation under Grant No. ESI-0532536. Any opinions, findings, and conclusions or recommendations are those of the author and do not necessarily reflect the views of the Foundation.

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