Heat, Light, and Sound Quiz

Which of the following in an example of heat conduction?

• An air vent from a furnace sending hot air into the house.
• A metal cup heating up when hot water is poured into it.
• The sun melting the ice formed on a frosty lawn.
• Cool air sinking to the ground on a cold night.

Which is the best activity to help keep a home cool in the summer?

• Open the refrigerator often.
• Turn off the television, radios, and computers.
• Open the windows during the day.
• Open the shades where the sun is shining.

In a room in the wintertime, where would you find the warmest air?

• near the ceiling
• near the floor
• in the corners
• by a window

What happens to the light particles when light hits an uneven surface?

• They are reflected off in a straight line.
• They are scattered in many directions.
• They are absorbed by the surface.
• They pass through the surface.

Why do you see your image in a mirror?

• Light is reflected.
• Light is refracted.
• Light is absorbed.
• Light is diffused.

Which of the following is an example of a light reflector?

• the planet Mars
• lightning
• exploding fireworks
• stars

Why is the moon classified as a light reflector instead of a light producer?

• The moon makes its own light from energy within it.
• The moon is visible because light from the sun bounces off of it.
• The moon is not visible from earth during the new moon phase.
• The moon glows from radiant energy below its surface.

What happens to a sound as the vibrations of an object increase in strength?

• The sound becomes louder.
• The sound becomes softer.
• The sound waves get further apart.
• The pitch of the sound is higher.

Jet airplane taking off 160 decibels.   (Damage to hearing)    
 Chain saw 110 decibels      
Hair dryer 90 decibels   (Annoying to hearing)     Ringing telephone 80 decibels (Annoying to hearing)  Normal conversation 60 (Acceptable to hearing)
Which of the following might damage hearing?

• hair dryer
• conversations
• ringing telephone
• chain saw

Jet airplane taking off 160 decibels.   (Damage to hearing)    
 Chain saw 110 decibels      
Hair dryer 90 decibels   (Annoying to hearing)     Ringing telephone 80 decibels (Annoying to hearing)  Normal conversation 60 (Acceptable to hearing)
Which of the following would be annoying but not damaging to hearing?

• whisper at 30 decibels
• vacuum cleaner at 75 decibels
• power lawn mower at 90 decibels
• radio on high at 112 decibels