Sound

Sound

1. Mucical instruments: use vibrations to make sound the speed of vibrations to play notes of different pitch

2. Echolocation: the sounds bounce off the walls caves and the bats use the echoes to find their way about

3. The decibel scale: Loud sounds can damage your hearing. Short exposure to sound levels above 130dB or long-term expotsure to levels above 100 dB can cause permanent damage

4. How sound travels: the particles in solids and liquids are much closer together than the particles in gases so they pass on sound vibrations more quickly

5. Sounds Waves:Sounds TravelThroughthe air as waves sound waves aremade by bibrations pushing the air to and fro

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