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    4. twirling maple seed
    twirling maple seed

    Why does the seed fall in a spiral? How is the shape similar to a propeller? How could you help students to understand how a propeller works, or why the maple seed twirls when it falls?

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    0  Views: 1159 Answers: 1 Posted: 14 years ago
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      So that when the wind blows the seeds, they disperse in a wider area.
      14 years ago. Rating: 1
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