Year 8 Science - Light and Sound

The pitch of a sound refers to...

• How high or low a sound is.
• How loud a sound is. 
• How far sound can travel. 
• How close the sound is to the ear. 

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 reverberation refer to?

• The volume of a sound. 
• The pitch of a sound. 
• A sound bouncing back (reflecting) off a surface. 
• A sound being absorbed. 

Two people hear a dog barking. Person A is 5 metres away. Person B is 20 metres 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 reverberation!"
• "Increase your sound wave pitch!"
• "Increase you sound wave reverberation!"

All materials made of matter can transmit sound through them. 

• False. 
• True, except for living things. 
• False, except for in space. 
• True. 

Which of the following sounds would you expect to be the quietest?

• A rock concert
• Heavy traffic on the freeway
• Normal conversation
  
• A plane taking off

Sound travels FASTEST through which of these materials?

• Air
• Empty space
• Metal
• Water

Sound travels FASTEST through....

• Liquids. 
• Solids. 
• Gases. 
• Space. 

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.