1st Grade Science Quiz
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WAVES: LIGHT AND SOUND
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Read how Carlos improved his bike whistle code. Original device: 1 short meant slow, 2 short meant stop. Test showed the whistle was hard to hear when wind blew away. Problem: sound did not reach his friend. Carlos added a bright orange flag to wave when stopping. New test on a windy day: his friend saw the flag and stopped. What change made the device work better?
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