Reflection: Checks for Understanding Speed of Light Vs. Speed of Sound - Section 4: Debrief on Speed of Light Versus Speed of Sound Analogies


This is an open ended activity where all groups have different answers. Most of the students fully engage in this activity as they are free to go in any direction they desire. Also, most of the groups have appropriate and accurate analogies.

While I share the student work with the class, I am careful to check for Student Errors. If an analogy is clearly not accurate, as in this case where the groups compare the size of the galaxy to the size of the moon, I skip over that sample. It is okay with me if groups are off by 20 or even 50%, but they should be within a magnitude of the actual value of 800,000 times different.

  Checks for Understanding: Student Work on Analogy
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Speed of Light Vs. Speed of Sound

Unit 5: Waves
Lesson 15 of 15

Objective: Student groups create an analogy that accurately compares the speed of light in air to the speed of sound in air.

Big Idea: The speed of light in a vacuum is about 800,000 times faster than the speed of sound in air.

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velocity (Physics), Science, physics, electromagnetic waves, constant velocity, speed of light, speed of sound
  50 minutes
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