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Pouvez-vous faire envoler une bille?

Quelles sont des stratégies que les plantes utilisent pour reproduire? La plupart du temps, les graines d’une plantes se font déplacer par des animaux, le vent, et l’eau. Ceux qui utilisent le vent en produisent plusieurs pour qu’elles se dispersent au loin. Ces graines ont des structures légères qui leur permettent de s’envoler.

Objectives

  • Observer comment les graines se déplacent avec le vent.

Materials

  • Par groupe :
    ventilateur électrique avec une cheminée sur la tête de 10cm.
    perles en bois de 15-20mm
    cure-pipes de 3 pouces
    tissus 5 pouces par 5 pouces : matériel de parachute, nylon léger, chiffon, toile, etc.

Key Questions

  • Qu’est-ce qui permet à la bille de s’envoler? (Nous avons ajouté de la masse à la bille)
  • Comment est-ce que la bille vole?
  • Si c’était une graine, qu’est-ce qui serait plus avantageux?

What To Do

  1. Montrez une perle aux élèves. Est-ce qu’elle s’envolera si on allume le ventilateur?
  2. Séparez les étudiants en groupe et distribuez les perles et cure-pipes. Chaque groupe reçoit une sélection de tissus et va construire une perle capable de vol.
  3. Testez vos modifications en mettant la perle dans la cheminée du ventilateur en marche.

Extensions

  • Parlez de la dispersion des graines des plantes et faites connexion avec cette activité.
  • Explorez un jardin ou par cet faites des observations des plantes pour voir comment chaque graine pourrait se faire disperser.

Other Resources

Science World Resources | Can you make a bead fly? | version anglaise de cette ressource

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Survivors

Artist: Jeff Kulak

Jeff is a senior graphic designer at Science World. His illustration work has been published in the Walrus, The National Post, Reader’s Digest and Chickadee Magazine. He loves to make music, ride bikes, and spend time in the forest.

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Artist: Jeff Kulak

Jeff is a senior graphic designer at Science World. His illustration work has been published in the Walrus, The National Post, Reader’s Digest and Chickadee Magazine. He loves to make music, ride bikes, and spend time in the forest.

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Comet Crisp

Artist: Jeff Kulak

Jeff is a senior graphic designer at Science World. His illustration work has been published in the Walrus, The National Post, Reader’s Digest and Chickadee Magazine. He loves to make music, ride bikes, and spend time in the forest.

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Artist: Michelle Yong

Michelle is a designer with a focus on creating joyful digital experiences! She enjoys exploring the potential forms that an idea can express itself in and helping then take shape.

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Artist: Michelle Yong

Michelle is a designer with a focus on creating joyful digital experiences! She enjoys exploring the potential forms that an idea can express itself in and helping then take shape.

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Artist: Michelle Yong

Michelle is a designer with a focus on creating joyful digital experiences! She enjoys exploring the potential forms that an idea can express itself in and helping then take shape.

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Science Buddies

Artist: Ty Dale

From Canada, Ty was born in Vancouver, British Columbia in 1993. From his chaotic workspace he draws in several different illustrative styles with thick outlines, bold colours and quirky-child like drawings. Ty distils the world around him into its basic geometry, prompting us to look at the mundane in a different way.

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Artist: Ty Dale

From Canada, Ty was born in Vancouver, British Columbia in 1993. From his chaotic workspace he draws in several different illustrative styles with thick outlines, bold colours and quirky-child like drawings. Ty distils the world around him into its basic geometry, prompting us to look at the mundane in a different way.

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Time-Travel T-Rex

Artist: Ty Dale

From Canada, Ty was born in Vancouver, British Columbia in 1993. From his chaotic workspace he draws in several different illustrative styles with thick outlines, bold colours and quirky-child like drawings. Ty distils the world around him into its basic geometry, prompting us to look at the mundane in a different way.