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How to grow snowflakes in a bottle with Science Friday

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If there’s no snow outside, try growing your own snowflakes. From Science Friday‘s collection of Holiday Science features and experiments, learn how to grow snowflakes in a bottle.

Caltech physicist, snowflake expert, and author of The Secret Life of a Snowflake Ken Libbrecht shares his snow crystal growing experiment, which requires a large plastic bottle, a bucket, a sponge, fishing line, pins, needles, and dry ice, which is frozen carbon dioxide (CO2).

a growing snowflake
Reminder: Wear gloves when working with dry ice, which can “burn” your skin if you touch it. Read more about safe dry ice handling here.

snowflake chart
growing a snowflake
Watch more dry ice videos, experiment videos, and videos about ice crystals, including:
• The scientist that grows ‘identical twin snowflakes’
• Go on a Snowflake Safari
• Watch snowflakes form in time lapse through a microscope

via @scifri.

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