Why do some buildings fall in earthquakes? Animated video addresses the key points of frequency, period, and resonance. All buildings have a natural, period, or resonance, which is the number of seconds it takes for the building to naturally vibrate back and forth. Classroom demo at end of animation. [5:31]

Concepts

earthquakes, resonance

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Classroom Considerations

• Knovation Readability Score: 5 (1 low difficulty, 5 high difficulty)