Understanding Sound and Vibrations

What happens to the sound of a voice as the distance from the source increases?

• It echoes

• It gets quieter

• It stays the same

• It gets louder

What causes the sound of your voice?

• Vocal cord vibrations

• Air movement

• String vibrations

• Ear drum vibrations

What role do air particles play in sound transmission?

• They carry vibrations

• They absorb sound

• They create vibrations

• They reflect sound

What happens to sound vibrations as they travel through air over a distance?

• They decrease

• They change direction

• They increase

• They get faster

What materials are needed to make a DIY string phone?

• Two plastic bottles and a yarn

• Two glass jars and a rope

• Two paper cups and a string

• Two metal cans and a wire

How can you test if the DIY string phone is working?

• By cutting the string

• By shouting into the cup

• By listening through the cup

• By pulling the string

Why must the string in a string phone be tight for it to work effectively?

• To prevent it from breaking

• To make it look neat

• To keep it from tangling

• To ensure clear vibrations

What is the effect of a loose string on the sound transmission in a string phone?

• Improves clarity

• No effect

• Reduces sound travel

• Increases volume

What should you do if the sound in your string phone starts to fade?

• Shorten the string

• Use a thicker string

• Tighten the string

• Replace the cups

Why is it important to experiment with the string phone at different lengths?

• To use up excess string

• To make the experiment more fun

• To improve the string's durability

• To find the maximum effective distance