character: Rachel
topic: Reflection of Sound Waves
grade: 6
subject: Science
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character: Echo the Dolphin
topic: How Echoes are Created
grade: 6
subject: Science
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character: Sonic the Hedgehog
topic: Speed of Sound and Its Reflection
grade: 6
subject: Science
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character: Professor Soundwave
topic: Understanding Sound Waves and Reflection
grade: 6
subject: Science
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