What are sound waves primarily composed of?

• Electric currents

• Light particles

• Vibrations

• Magnetic fields

What does the frequency of a sound wave determine?

• The direction of the sound

• The pitch of the sound

• The speed of the sound

• The loudness of the sound

Which unit is used to measure the amplitude of sound waves?

• Hertz

• Decibels

• Meters

• Watts

Which of the following can create sound waves?

• A mirror

• A light bulb

• A musical instrument

• A vacuum

Through which medium do sound waves travel the fastest?

• Gases

• Liquids

• Solids

• Vacuum

What happens to sound waves when they encounter a soft material?

• They are reflected

• They are amplified

• They are absorbed

• They are refracted

What is the effect called when sound waves bounce back from a hard surface?

• Diffusion

• Echo

• Refraction

• Absorption

What is the term for the bending of sound waves as they pass through different mediums?

• Refraction

• Diffusion

• Absorption

• Reflection

In the tuning fork experiment, what do the ripples in the water demonstrate?

• Sound waves creating light

• Sound waves creating heat

• Sound waves creating electricity

• Sound waves creating vibrations

What change occurs to the pitch of a sound when the frequency of the sound wave increases?

• The pitch remains the same

• The pitch becomes higher

• The pitch becomes distorted

• The pitch becomes lower