How do sounds travel?

Sound travels from a source to our ears through compression waves. These waves are created by vibrating vocal cords and need a medium like gas, liquid, or solid to travel. The speed of sound varies depending on the medium, being fastest in solids and slowest in gases. Regardless of speed, sound is always transmitted as compression waves.

What happens to air molecules when people sing?

• They become silent.

• They vibrate.

• They disappear.

• They change color.

What type of waves are sound waves known as?

• Magnetic waves

• Radio waves

• Compression waves

• Light waves

Why do sound waves need a medium to travel?

• To increase speed

• To become visible

• To change direction

• To be transmitted

In which medium does sound travel the fastest?

• Vacuum

• Gas

• Liquid

• Solid

Which statement is true about the speed of sound in gases?

• It is the fastest.

• It is the slowest.

• It is the same as in liquids.

• It does not travel in gases.