sound

An ________ is a reflected sound.

• Vibration
• Echo
• Pitch
• Volume

Sound is a form of energy produced by ______________.

• Vibrations

• Distances

• Prisms

• Forces

A place where no sound exists is...

• in the air.

• under water.

• space.

• all of the above

Why do we see lightning before we hear the thunder?

• Our eyes trick us.

• Light travels faster than sound.

• they're two separate things.

When people speak their ________ vibrate.

• Ear drums

• Vocal chords

• Ears

• Tongue

What is Pitch?

• How loud or soft a sound is.

• Muscle that holds vocal cords.

• Movement back and forth.

• How high or low a sound is.

If you increased the tension on a guitar string the pitch would 

• increase
• decrease
• stay the same
• the string would be silent

The part of the ear that vibrates first when hearing a sound

• eardrum
• cochlea
• Outer ea
• Lobe

Sound waves are all of the following EXCEPT

• it requires a medium
•  high and low
• soft or loud
• only high frequency

The volume of a sound is measured in units called ________

• decibels
• liters
• sound waves
• inches per minute