Sound ??

Sound ??

1. Sound Waves: Souns travel through the air as waves, just like water waves spread when you throw a stone into a pond.

2. How soun travels: Space is a vaccum . this means ther is on air. Whihout air there is nothing to carry the sound waves

3. Musical instruments use vibrations to make sounds.

   • Strings that vibrate when they are pliched or when a bow is pulled across them
   • Whind instrumen make the air vibrate , the player chanche the pich of the note be opening holes in the side of the tube
   • percussion intruments as vibrate when they are hit or trapped

4. Echolocation sonar is a from of inderwater echo location. boats use sonar to locate underwater reefs or shoals or fish

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