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| Lilly tests the slow and fast vibrations a ruler can make. She knows a slow vibration makes a low pitch and a fast vibration makes a high pitch. |
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| Justin makes a nail xylophone. He learns the larger nail makes a low pitch and the smaller nail makes a high pitch. |
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| Ava hits the big tuning fork on the bottom of her foot to hear its low pitch. |
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| Ethan feels his vocal cords working as he hums a tune. |
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| Nicolas touches a tuning fork to the surface of water to see the vibrations. |






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