Sound energy

Front

What is sound?

Back

Sound is a form of energy produced by vibrating objects.

Front

What is vibration?

Back

When a ruler is plucked, there is a quick back and forth movement. This movement is called vibration.

Front

Some facts about vibration...

Back

1. Usually too small to see

can be made with your vocal chords

It produces sounds

Its a rapid back and forth movement

Front

How does sound travel?

Back

Sound travel in waves through all the states of matter, such as solids, liquids or gases. because all matter is made up of particles and these particles can vibrate. Sound cannot travel through an empty space because it has no air particles. An empty space is called a vacuum.

Front

True or False: Sound travels faster through liquids than it does through gases, because liquids are denser than gases

Back

True

Front

Sound and air, what happens?

Back

The more air there is in the bottle, the lower the sound. The less air there is inside the bottle the higher the sound.

Front

What is frequency?

Back

It is the speed at which an object vibrates to produce sound. A high frequency produces a high-pitched sound, wheras a low frequency produces a low-pitched sound.

Front

What is a pitch?

Back

It refers to the highness or lowness of a sound. As the frequency increases so will the pitch and the vibration and the quality of the sound.

Front

What is the unit of frequency measurement?

Back

Hertz. Named after the German Scientist Heinrich Hertz

Front

What are the ways to change the pitch?

Back

Thickness: Thicker strings are heavier than thinner strings, so they vibrate more slowly and produce a lower pitch.

Length: The longer a string the lower the pitch

Tightness: The tighter the string the higher the pitch