Sound: Lesson Review

​SOUND: Lesson Review

Grade 9​

​Sound is a wave-like form of energy

Light Energy travels in transverse waves

​

Sound energy travels in longitudinal waves​

S

Multiple Choice

Another name for a longitudinal wave is a ________________ wave

• reflection

• electromagnetic

• compression

• echo

Multiple Choice

Longitudinal waves rely on the vibration of __________

• sound

• particles

• energy

• echoes

​Parts of a Sound Wave

Multiple Choice

A rarefaction is caused when ________________

• particles separate in a sound wave

• particles bounce off of each other in a sound wave

• particles squeeze together in a sound wave

• particles reverse direction in a sound wave

Multiple Choice

Identify part B of the sound wave

• compression

• wavelength

• trough

• echo

Multiple Choice

Can we hear sound in a vacuum?

• Yes

• No

Multiple Choice

Identify part A

• rarefaction

• reflection

• wavelength

• compression

​There are 3 characteristics of sound

Subject | Subject

Quality: this allows us to differentiate one sound from another

​

Pitch: how high or low a sound is​

​

Loudness: the volume of a sound​

Multiple Choice

Loudness is measured in

• Bass Level

  BL

• degrees

  o

• Nanometers

  nm

• decibels

  Db

Multiple Choice

Frequency is measured in ____________

• Joules

  J

• Nanometers

  Nm

• Decibels

  Db

• Hertz

  Hz

Amplitude affects volume of a sound. when increased a sound will be louder

​

Frequency of wavelengths affects pitch. Increasing wavelengths means increasing pitch or highness of a note​

​

​Interpreting sound waves

​

Multiple Choice

the pitch of a sound is affected by the _______________ of the wave

• decibels

• frequency

• amplitude

• rarefaction

Multiple Choice

If the amplitude of a sound wave increases, it will be ____________

• louder

• more high

• quieter

• more low

Multiple Choice

Describe the sound this wave would produce

• high pitched and quiet

• low pitched and quiet

• high pitched and loud

• low pitched and loud

Multiple Choice

Which of these waves would sound louder?

• the left wave

• the right wave

Multiple Choice

Describe the sound this wave would produce

• high pitched and quiet

• low pitched and quiet

• high pitched and loud

• low pitched and loud

​Echoes

An echo is produced when a sound hits a hard object and bounces back​

Echoes are used in:

• echolocation

• calculating distance

• sonar technology

• finding the depth of water​