A good example that shows that air is really "stuff" is the way a parachute works. After doing the activity, think of the problems a parachute would have if air really was just empty nothingness. Work ...
They experiment with different shaped objects ... trying to make their water rockets travel the farthest. Harnessing air resistance with parachutes. videoHarnessing air resistance with parachutes ...
Parachutes increase air resistance and enable sky divers to ... Adjust your shapes to make them more hydrodynamic and redo the experiment. How did the changes you made reduce drag?
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