1. Sound Energy Review
By Ms. Nguyen

2. What is sound? A form of energy caused by _____________.
Vibrations are the rapid back and forth ______________ of molecules.
Sound travels in ____________.
Sound travels in all ______________ from its source.

3. Pitch Measures how _____ or ______ a tone sounds to your ear.
Pitch depends on the ____________ of the sound waves.
____________ is the measure of the number of waves that pass in a given amount of time.
High frequency= more waves= ______ pitch.
The longer, larger, or looser an instrument
= _______ pitch.

4. Volume Volume is the __________ or intensity of a sound.
Volume depends on the amount of___________ used to produce the sound.
Yelling requires ___________ energy compared to whispering.

5. More Volume Volume is how ___________ or ____________ a sound is.
Sounds can be reflected off surfaces or __________ by them.
The library uses materials that absorbs sound like:_______
The gym uses materials that reflects sound like:________
When sound is reflected off a surface we can hear an _______.
The reflection of sound is known as __________________.

6. Speed of Sound Sound travels faster through ____________.
Sound travels ___________ through liquids and gases.
A vacuum is a place with no ___________.
Sound does not ______________ through a vacuum.
There is no _________ in space so no sound are produced.