character: Professor Wave
topic: How Sound Changes in Solid, Liquid, and Gas
grade: 4
subject: Science
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character: Professor Wave
topic: The Basics of Sound Waves
grade: 4
subject: Science
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character: Professor Wave
topic: How Sound Travels Through Different Materials
grade: 4
subject: Science
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character: Professor Wave
topic: The Speed of Sound in Various States of Matter
grade: 4
subject: Science
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