Chapter 9 Test Review (Sound)

A kind of energy that travels in waves that you hear

• Sound

• Crest

• Light

• Pitch

How high or low a sound is

• pitch

• volume

• sound

• acoustics

How loud or soft the sound is

• pitch

• acoustics

• wavelength

• volume

The study of how sounds travel and how they can be controlled

• acoustics

• wavelength

• pitch

• trough

Sound waves travel slowest through a _____

• solid

• liquid

• gas

Sound waves travel fastest through a ______

• solid

• liquid

• gas

If you want to change the pitch of a sound, you have to change the ___

• frequency
• amplitude
• speed
• volume

This is the unit used to measure the volume of a sound. 

• Decibel
• Medium
• Vibration
• Oscilloscope

As a sound source approaches and then moves past a stationary observer, the observer will hear

• a steady rise in pitch
• a sudden drop in pitch
• a drop in pitch, then a rise in pitch
• a rise in pitch, then a drop in pitch

Bats use ________ TO LOCATE MOSQUITOES IN THE AIR.

• solar
• ecology
• echolocation
• evolution