Understanding Sound

What is sound?

• Energy produced by vibrations
• Light waves
• Heat waves
• Static electricity

How does sound travel?

• Through solids, liquids, and gases
• Only through solids
• Only through liquids
• Only through gases

How does the pitch of a sound change with the frequency of vibrations?

• Higher frequency vibrations create higher pitch sounds

  Lower frequency vibrations create lower pitch sounds

• Higher frequency vibrations create lower pitch sounds
• Lower frequency vibrations create higher pitch sounds

• High frequency vibrations create higher and low pitch sounds

What is an example of a high pitch sound?

• Whistle
• Drum
• A cow mooing

• Thunder

How does the amplitude of vibrations affect the volume of sound?

• Larger amplitude vibrations create louder sounds
• Smaller amplitude vibrations create quieter sounds
• Amplitude does not affect volume
• Amplitude affects the pitch, not the volume

What is an echo?

• A reflected sound wave
• A type of musical instrument
• A type of loud noise
• A type of animal call

How can sound be absorbed?

• By soft and porous materials
• By hard and smooth surfaces
• By metal objects
• By glass surfaces

What is resonance?

• When an object vibrates at its natural frequency
• When an object absorbs all sound waves
• When sound travels at the speed of light
• When sound changes pitch

How does sound travel in water compared to air?

• Sound travels faster in water than in air
• Sound travels slower in water than in air
• Sound does not travel in water
• Sound travels at the same speed in water and air

How do sound waves change when they are absorbed by a material?

• They get louder
• They disappear
• They bounce back
• They are not reflected and disappear