A measure of how high or low a sound is perceived to be, depending on the frequency of the sound wave

• Pitch

• Frequency

• Amplitude

• Decibel

The most common unit used to measure loudness (symbol: dB)

• Hertz

• Decibel

• Centimeters

• Yards

the combination of two or more waves that results in a single wave

• Resonance

• Refraction

• Interference

• Echo

sound waves with frequencies greater than 20,000 hertz (Hz), the upper limit of typical hearing levels in humans, often used in medical purposes

• Frequency

• Infrared rays

• Ultrasound

• Radio Waves

a reflected sound wave

• Mirror

• Image

• Echo

• Opaque

Which of these waves represents the loudest sound?

• 
• 
• 
• 

What are you doing when you're making sound?

• Causing photons to travel.
• Causing air molecules to vibrate.
• Causing electromagnetic waves to radiate.
• Causing air pressure to drop.

Which of these does sound travel fastest through?

• Steel
• Water
• Air
• Rock

What wave produces the highest frequency?

• 1
• 2
• 3
• 4

As frequency increases, _______ increases.

• pitch
• wavelength
• frequency
• sound