The science of snowflakes

The science of snowflakes

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Maruša Brada: The science of snowflakes | TED TalkMain menuTEDSearchCancel search

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Multiple Choice

Which of the following describes a hydrogen bond?

• The bond between hydrogen and oxygen within a molecule of water

• The bond between two hydrogen atoms within a molecule of water

• The bond between hydrogen in one water molecule and another hydrogen in a different water molecule

• The bond between hydrogen in one water molecule and oxygen in a different water molecule

Fill in the Blanks

The hexgon properties of ice crystals are due to the polarity of the water molecule. True or false?

Open Ended

We learned that we can ski due to a layer of water between the snow and the skis that form due to friction; can you think of any other sports where we utilize a similar process?

Multiple Choice

Why are snowflakes six-sided?

• Because liquid water boiled at lower temperatures at higher altitudes where snowflakes form

• Because dirt particles needed for snowflakes to form are six-sided

• Because ice crystals are six-sided

• None of the answers

Poll

Have you ever caught snowflakes with you tongue? :)

• Sure I have!

• Noo, it's silly

• I don't want to answer

Multiple Choice

Why can a skier slide over snow?

• The friction between the ski and snow decreases when the skier steps on skis

• The friction between the ski and snow increases when the skier steps on skis and causes snow to melt providing lubrication

• The pressure between the ski and snow increases when the skier steps on skis and causes snow to melt providing lubrication

• The pressure between the ski and snow decreases when the skier steps on skis and causes snow to melt providing lubrication