Paul Andersen Paul Andersen

Coupled Pendulum

Description:  The coupled pendulum can be created with either string or a spring connecting the two pendulums. With each swing energy is transferred from one pendulum to the other. If the pendulums both have the same length one pendulum comes to a complete stop before alternating motion. This phenomenon can be used to show balanced and unbalanced forces, how motion can be used to predict future motion, and the conservation of energy.

Web Resource:  L.R. Ingersoll Physics Museum

 
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Paul Andersen Paul Andersen

Giant Newton's Cradle

Description:  The coupled pendulum can be created with either string or a spring connecting the two pendulums. With each swing energy is transferred from one pendulum to the other. If the pendulums both have the same length one pendulum comes to a complete stop before alternating motion. This phenomenon can be used to show balanced and unbalanced forces, how motion can be used to predict future motion, and the conservation of energy.

Web Resources:  Giant Newton’s Cradle Website, Wikipedia article

 
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Paul Andersen Paul Andersen

Google Maps Timelapse

Description: The Google Maps Timelapse engine allows you to see the impacts of humans on local environments over the last three decades. Use the search box to find local human impacts. 
Local phenomenon (e.g. housing developments, logging, shrinking water reservoirs, etc.) can lead to local solutions to human impacts on the land and water.

Web Resource: Google Maps Timelapse

 
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Paul Andersen Paul Andersen

Floating Whiteboard Ink

Description:
I learned about this phenomenon when a teacher spilled their water on my whiteboard.  Make sure to use a plate with an impermeable surface.  It's a great phenomenon for intermolecular forces.  Surface chemistry, temperature, color, ink type, polarity, salinity, and many more factors affect this phenomenon.  

Web Resources:  Drawing on Water - It is so surreal  - YouTube

 
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Paul Andersen Paul Andersen

The Arecibo Message

Description:  The Arecibo message was an interstellar radio message containing information about life on our planet.  The message contained 1679 (semiprime) bits of information that could be organized into the graphic seen below.  The message contained information on our planetary system, genetic information, human dimensions, and the Arecibo telescope.

Web Resources:  Arecibo Message - Wikipedia

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By Arne Nordmann (norro) (Own drawing, 2005) [GFDL, CC-BY-SA-3.0 or CC BY-SA 2.5 ], via Wikimedia Commons
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Paul Andersen Paul Andersen

Termite Olympics

Description:  This video shows the behavior of worker termites released onto a piece of paper with the Olympic rings drawn in pen.  Termites will follow a single line of ink as well.

 
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Paul Andersen Paul Andersen

Magnetic Cannon

Description:  The magnetic cannon contains four spaced neodymium magnets in a channel.  Two balls bearings are placed between each ball bearing.  When a new ball bearing is introduced a transfer of energy occurs and the final ball bearing leaves with a higher initial velocity than the first.  This is a great phenomenon for studying transfer of momentum and the energy of an object based on its position within a magnetic field.

Web Resource:  Magnetic Challenge with Bozeman Science

 
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Paul Andersen Paul Andersen

Easter Island Deforestation

Description:  The island of Rapa Nui once supported a large community of Polynesians that are best known for the massive statues (moai) pictured below.  However when sailors arrived on the island in the 18th century the people were barely hanging on.  What is not pictured below are any trees.  Deforestation led to the collapse of this culture.

Web Resource:  How Easter Island Works - How Stuff Works

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By Aurbina - Own work, Public Domain, Link

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