Quick Assessment - Sound - Grade 9

Sound waves travel as ________ waves.

• Transverse

• Longitudinal

• Surface

Sound is made when a source of energy forces the matter around it to __________.

• Vibrate

• Amplitude

• Stay still

• Pitch

Sound waves CANNOT travel through which of these:

• Paper

• Milk

• Outer space

Loudness of waves is measured in

• Hertz

• Decibels

• Watts

High Amplitude =__________________

• Louder sounds
• Quieter Sounds

In General Sound waves travel the fastest in __________

• solid
• liquid
• Gas
• plasma

In General Sound waves travel the slowest in __________

• solid
• liquid
• Gas
• Plasma

A sound is loud or soft depending on its ____________

• Amplitude
• Frequency

What happens when you increase the amplitude of a sound?

• It makes the sound travel faster

• It makes the sound louder

• It increases the wavelength of the sound

• It increases the frequency of the sound

True or False: Can sound travel though a vacuum (space)

• True

• False