Science 101: Why Do You Lose AM Radio Reception When You Go Under an Overpass?by: Bill Robertson

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This column provides background science information for elementary teachers. This month’s issue talks about electromagnetic waves.

  • Elementary
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Reviews (3)
  • on Fri Sep 30, 2016 12:21 AM

I loved this article! I thought it showed a great way to introduce the topic to your students and then let them predict why this occurs. In addition, it includes an experiment to do with your students, reflect on the experiment and build on their prior knowledge!


  • on Fri Jan 25, 2013 5:10 PM

I had wondered about the answer to the question before, but never took the time to research the nuts and bolts on my own. Robertson does a great job of making the concept of frequency, as it relates to radio and cell phone signal, understandable. I liked the hands on experiment as well. I now will be able to demonstrate and explain the reasoning of this concept to my family as we drive long distances. I'm sure they can't wait!

Scott Farver  (Gallup, NM)
Scott Farver (Gallup, NM)

  • on Wed Nov 16, 2011 11:08 AM

Through an everyday occurs that most people experience this author introduces the concept of waves, wave frequencies and more. With human and strong urging to try what he is explaining you learn the answer to this everyday event. This is a great way to introduce your students to waves and wave interference.

Adah  (San Antonio, TX)
Adah (San Antonio, TX)

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