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.

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

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
• Vacuum

• Metal
• Water

Sound travels SLOWEST 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 vibrates the air particles around it.

• The string absorbs sound waves.

Which of the following is not true about light?

• It's a form of electromagnetic radiation

• It's a form of energy.

• It can be reflected.

• It needs medium to travel.

When light hits a mirror, it is...

• Refracted (bent). 
• Transmitted through. 
• Reflected (bounced off). 
• Absorbed into the mirror.