Sound Science

A boy is plucking a stretched rubber band to make sounds. How can he change the pitch?

• Stretch the rubber band more or less tightly.
• Pluck the rubber band harder or more softly.
• Pluck the rubber band more quickly or more slowly.
• Move closer to or father away fom the rubber band.

How are light and sound alike?

• Both travel as rays.
• Both can vary in pitch.
• Both depend on vibration in air.
• Both are forms of energy that travel as waves.

What does the frequency of a sound wave determine?

• Amplitude
• Energy
• Pitch
• Volume

Two people hear a dog barking. Person A is 5 meters away. Person B is 20 meters away. Which is most likely true?

• The bark sounds louder to person A
• The bark sounds louder to person B
• The bark's pitch sounds higher to person A
• The bark's pitch sounds higher to person B

What might you say to this boy who is yelling?

• "Lower your sound wave amplitude!"
• "Lower your sound wave frequency!"
• "Increase your sound wave frequency!"
• "Increase you sound wave amplitude!"

What is being shown by the line between the tops of the waves in figure (a)?

• Amplitude
• Direction
• Trough
• Wavelegth

Which can you conclude about the sounds in the chart below?Sound                                            DecibelsQuiet Whisper                                     20Normal Conversation                        60Heavy Traffic                                     85Rock music at a concert                    115               

• A quiet whisper has the lowest pitch
• Sound waves from a quiet whisper vibrate across the greatest distance.
• The sound waves of rock music at a concert have the greatest amplitude.
  
• The sound waves of heavy traffic have a higher frequency than normal conversation.

Sound travels FASTEST through which of these materials?

• Air
• Empty space
• Metal
• Water

Which is the BEST description of how sound is produced by someone playing a guitar?

• The strings produce transverse waves of energy.
• When the strings are plucked, air particles vibrate.
• The strings transfer energy from the player's hands.
• The player's fingers cause air particles to move across the room.

What happens when a violin string is plucked?

• Sound wave moves in one direction.
• Sound waves move through the string.
• The string produces sound waves.
• The string absorbs sound waves.