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science experiments with sound

1. Pluck a rubber band MATERIALS: a small, but thick rubber band. STATE GOAL: 13.A.2b- Explain why similar investigationsmay not produce similar results. SAFETY CONDITIONS: Goggles to protect your eyes MATH CONNECTION: none PROCEDURE: 1. Place the rubber band between your thumb and forefinger and strtch it a little bit. 2. Hold the rubber band close to your ear with the other hand. 3. Stretch one side of the rubber band and hold it tight. 4. Observe the sound you just made. 5. Repeat steps but this time, stretch it farther before you let it go. EXPLANATION: When the rubber band is stretched farther, you are going to hear a higher and louder sound. It's the same as a guitar. When the strings are tied tight, they vibrate at a higher frequency. SOURCE: 2. Two Bonce Ball MATERIALS: a basketball, golf ball, ping pong ball STATE GOAL: 12.D.2b- Demonstrate and explain ways that forces cause actions and reactions. SAFETY CONDITIONS: none MATH CONNECTIONS: Measuring the height of the balls per bounce. PROCEDURE: 1. Each group will take the balls and drop them from chest high listen to the sound each ball makes. 2.Next, they will give it a little force and do the same thing by dropping the balls. 3. Then they will give a lot of force and throw the balls on the ground and hear the sound it makes. 4. Finally, record the results. Were the sounds louder or softer? EXPLANATION: The harder one throws something, the louder and more of an impact it will make. SOURCE: 3. Can sound travel through things MATERIALS: A metal spoon and string STATE GOAL: 11.A.2e-Report and display the results of individual and group investigations. SAFETY CONDITIONS: Goggles to protect eyes MATH CONNECTION: Angles and measurement PROCEDURE: 1. Drop the spoon onto the table and observe the sound it makes. 2. Tie a piece of string to the spoon leaving enough room to swing the spoon. 3. Tie the ends of the string to your first two fingers. Place the fingers with the string tied to them and put them in your ear. 4. Tap the spoon against the table. What sound does it make? 5. Try other objects to tap against. 6. Record your results. EXPLANATION: When the spoon is being tapped against an object, the sound travels through the string into your ear. These are called sound waves. So yes, sound can travel through things. SOURCE:

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