SNOWFLAKES Nano at its coolest!. What do you know about snow?
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SNOWFLAKES Nano at its coolest!
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Transcript of SNOWFLAKES Nano at its coolest!. What do you know about snow?
Nano is very, very small
• A nanometer is a billionth of a meter.
• Molecules are nanometers across.
Shape is determined by molecular structure
Basic shapesof snowflakes
Molecular structure of ice crystals
Snowflakes self-assemble
• Molecules and cells form themselves into structures…
• …under the right conditions, with the right raw materials.
Review
• When does it snow?– Cold, cloudy conditions
• Why do snowflakes have six sides?– Molecular structure of ice crystals
• Is every snowflake different?– Temperature and humidity
Image sources (continued)
iStockphoto.com
Courtesy of NOAA National Weather Service Collection
Courtesy of NASA Marshall Space Flight Center
Courtesy of IBM