Ball and Ring [Demonstration Guide]

The Lessons of Phyz
Grade Levels
7th - 12th, Higher Education, Adult Education, Homeschool
Resource Type
Formats Included
  • Google Drive™ folder
2 Student Pages & 2 Key Pages
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The Lessons of Phyz
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  1. The bundle opens with a virtual demonstration of thermoscopes and a discussion of temperature scales. Next we have the classic ball and ring thermal expansion demonstration guide, followed by a demonstration to see the difference between hot and cold in a couple of ways.The Mechanical Universe's "Te
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The ball and ring is a well-worn classic among thermal physics demonstrations. The ball barely fits through the ring when everything's at room temperature. Heat the ball, and it no longer fits through the ring. But what happens if you heat the ring instead?

Most folks leave it there. But did the inner diameter of the ring expand or remain the same upon heating, The result of the demo is inconclusive. So a third demo is called for. The explanation for the result is also provided.

Details are in the included presentation. When I ran this demo in remote teaching, I conducted it live over Zoom, so I didn't record any video. That's why I'm casting this resource as a demonstration guide. Still useful to run while you do the demo in class.


Student document (print-friendly Google Docs file on Google Drive)

Instructional presentation (link embedded in answer key)

Answer key

Total Pages
2 Student Pages & 2 Key Pages
Answer Key
Teaching Duration
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