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Stop the Stretching
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  Learners work with plastic sheeting, masking tape, and string to design the perfect material for plastic chair webbing, and then construct their webbing.
  
Tug-of-War
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  This activity (on page 2 of the PDF under SciGirls Activity: Tug O' War) is a full inquiry investigation into tug-of-war physics. Groups of learners will test two tug-of-war strategies.
  
Air Pressure and Dent Pullers
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  In this activity, learners simulate Otto von Guericke's famous Magdeburg Hemispheres experiment.