Focus on Lenz’s Law


Ted Beyer, Educational Innovationsby Ted Beyer

Ahhh, Eddy Current Tubes – you would never think that a hunk of copper pipe and a magnet could make anyone grin from ear to ear. I just love these things.

So simple in appearance, and yet so magical to see and use. Whenever I happen to have a set at home, I soon lose control of them to my wife who is just as fascinated by them as I am.

Although they can be used in fairly high end physics demonstrations, they are stunning enough that everyone who has a chance to see them is simply amazed.

Just realized – you may not have not seen one, have you? Here’s a video for you:

Kinda cool, huh? So, since I have (hopefully) gotten you to say “wow,” I’ll just bet you are wondering “why” — here’s some science:

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Learning About Light


Marty Sagendorfby: Marty Sagendorf

Light is magic stuff: it has no mass, it comes in many colors, it has energy, it can be emitted and absorbed, but it can’t be saved in a bottle or bucket.  Even though we can’t ‘save’ it, we can explore the many ways that light behaves around us.  We are told, or we read, about reflection, refraction, and the many other properties of light’s interaction with objects, but until we actually experience these we really don’t fully appreciate ‘the magic of light’.

Let’s start learning about light!

That’s what this Optics Kit, from Educational Innovations, allows us to do – experience light by doing.  This kit provides the necessary components to perform extensive investigations – ten are completely detailed – and new ideas for experimentation will naturally develop as optics principles become familiar.

Let’s begin with something we see every day:

REFLECTION

Start by drawing a line along, and one-half inch from, the long side of a piece of 8-1/2”x11” white paper.  At the mid-point of this line, draw a perpendicular line extending across the paper.  This line represents a ‘NORMAL’ to the mirror’s surface.

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Everyone Loves a Mystery


Janice Van Cleaveby:  Janice VanCleave

Identify the Physical Properties of Mystery Artifacts

The mystery artifacts used for this investigation are special and can be purchased at Educational Innovations.   The artifacts are called “Ice Melting Blocks,” but this name gives too much information. Prior to the investigation, I suggest that you introduce them as artifacts, objects that have been intentionally made or produced for a certain purpose.

Objective:

To investigate mystery artifacts and determine their possible purposes as well as the real or imaginary culture that might have made them. Set the stage by placing the mystery artifacts on a table and covering them with a cloth. If possible, screen off the investigating area so that only the “student science explorers” can view the blocks.

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The Laws of Physics


Tami O'Connor, Educational Innovationsby: Tami O’Connor

My husband and I just returned from his reunion at Cornell University.  He attended the law school, so, while he reminisced with his friends about this loophole and that exception, I became curious about other events being held at the university.  I scanned the various offerings, and though he was interested in the course entitled “Effective Strategies for Conducting Online Legal Research”, the class entitled “Favorite Physics Demonstrations” at 2:00 PM jumped off the page at me.  The immutable laws of physics were just the diversion I needed!

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Hovercraft Addition – Collisions!


by:  Jim Fiddes

I recently used this extension of the balloon-CD hovercraft plans in Norm Barstow’s blog for a middle school physical science lab, but it could be easily adapted for a high school IPS class. It works as inquiry for higher-achieving students, but just as well with more detailed direction, for regular classes.

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