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Simple instruments to explore sound and frequency.

Tornado in a Bottle Inquiry   

We will use funnels, soda bottles, and a toy called a Tornado Tube to explore the concepts of moment of inertia, rotational motion, angular momentum, kinetic and potential energy, and air pressure in an attempt to discover and explain the physics of a rather complex hydrodynamic system.

Click here for applicable science standards      Indicates the level of technology required for the lab activity.  Good for grade levels 5 through 8       

Required Equipment
Plastic Funnel, Stopwatch, Vortex Tube, Materials for Designing a Funnel, 2 Empty Soda Bottles, Water Source, Large Tub or Sink.

Acknowledgements: Thank you to Dr. J.R. Harkay author of Phenomenal Physics for providing this student inquiry activity. Adapted from “Twister! Tornado in a Bottle,” an Inquiry Exercise by J. R. Harkay. See www.PhenomenalPhysics.com for more information on the complete Guided Inquiry Curriculum.

Dr. Russell Harkay
Keene State College
New Hampshire

Download Teacher Notes and Student Worksheets

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Recommended quantity per lab group: 1

   38-5020-02
                                         
  Plastic Funnel                                  Add To Cart
  $2.50  Product Details

         
 

Recommended quantity per lab group: 1

   52-3200
                                         
  Digital Stopwatch Timer                                  Add To Cart
  $9.95  Product Details

         
 

Recommended quantity per lab group: 1

   P1-1120
                                         
  Vortex Tube                                  Add To Cart
  $1.50  Product Details

         
 

Recommended quantity per lab group: 1

The "Materials for Designing a Funnel" required for this lab is any material out of which you can create your own funnel.

Recommended quantity per lab group: 2

The "Empty Soda Bottles" required for this lab are any ordinary soda bottle that has been emptied of its content. Each lab group would need 2 bottles.

Recommended quantity per lab group: 1

The "Water Source" required for this lab is any available source of tap water.

Recommended quantity per lab group: 1

The "Large Tub or Sink" required for this lab is any available tub or sink that is large enough to perform this experiment in.