Sound

What is sound?

• When things or air vibrates
• When things change temperature

The _________ of a sound is how loud or quiet it is.

• pitch
• volume
• frequency

___________ is how high or low a sound is

• Volume
• Tone
• Pitch

The _________ the source of the vibrations, the louder the volume of the sound will be.

• Quicker
• Farther away
• Closer

A high, squeaky sound is described by which of the following?

• High pitch
• High volume

Which unit is used to measure the loudness of sound?

• hertz (Hz)
• decibel (dB)
• ultrasound

Sound travels fastest through ________________

• solids
• liquids
• gases

We make sound when our _____________ vibrate.

• vocal chords
• throat
• lips

If the force of plucking a guitar string is decreased, the volume becomes ___________

• softer
• louder

When astronauts landed on the moon, they could not hear the sound of their craft striking the lunar surface. Why could they not hear this sound?

• Their space suits were too thick to allow sound in.
• There is no air on the moon.