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Move a pencil back and forth while smoothly pulling a piece of paper under the oscillating point. This generates a train of waves across your paper with measurable amplitudes and wave lengths. Time the frequency of these vibrations to determine wave speed. Masking tape that is stuck to a vibrating tuning fork and swept across greased glass makes a similar wave train. Relationships between intensit... More

Move a pencil back and forth while smoothly pulling a piece of paper under the oscillating point. This generates a train of waves across your paper with measurable amplitudes and wave lengths. Time the frequency of these vibrations to determine wave speed. Masking tape that is stuck to a vibrating tuning fork and swept across greased glass makes a similar wave train. Relationships between intensity and amplitude, pitch and frequency, follow as naturally as listening. Your students will generate both longitudinal and transverse waves by cutting an index card slinky. They ll study resonance and beats, even build a musical instrument. The book is organized into three main parts: INTRODUCTION* A TOPS Model for Effective Science Teaching * Getting Ready * Gathering Materials * Sequencing Task Cards * Long Range Objectives * Review / Test Questions TEACHING NOTES (20 lessons)* Sources of Sound * Pencil Waves * Hair Pin Waves * Frequency * Wave Train * Tuning Fork Waves * Intensity * Pitch * Sound Mediums * Two Kinds of Waves * Longitudinal Waves * Pitch Problem (1) * Pitch Problem (2) * Resonance * Beats * Octave Rules * How Low Can You Go? * On the Record * Reed Music * Speed of Sound REPRODUCIBLE LINE MASTERS* 20 Open-Ended Task Cards * Frequency Strips * Metric RulersAuthor: Ron Marson, Illustrated by Peg MarsonSubject Area: PhysicsLevel: Grades 7-12Format: 56 pages, PaperbackPublisher: TOPS Learning Systems (1990)ISBN: 0-941008-88-6

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