Stage 7 Science: 6.1 Sound waves

What is an observation?

• Something you can work out from your results

• Something you see, hear, smell, or sense in some other way

• A guess based on past experiences

• A scientific law

What is the conclusion that Marcus makes after hearing Zara's tapping through the desk?

• Sound cannot travel through wood

• Vibrations make no difference in sound

• Sound travels through wood

• Sound can only travel through air

In the bell jar experiment, why can Arun no longer hear the bell when air is removed?

• The bell stops vibrating

• Sound cannot travel through a vacuum

• The glass jar blocks the sound

• The pump is too loud

Which factor determines how high or low a sound is?

• Loudness

• Vibrations

• Pitch

• Speed of sound

Through which medium does sound travel the fastest?

• Air

• Wood

• Water

• Vacuum

Sound waves move more easily through a slack string (Loose or not tight) than a taut string (means something is pulled tight).

• TRUE

• FALSE

Vibrations are necessary for sound to travel.

• TRUE

• FALSE

Sound can travel through all solids, liquids, and gases.

• TRUE

• FALSE

• What conclusion do the boys make when using paper cups and a string telephone?

• Sound travels through the air.
• Sound travels through the string.

What conclusion do the boys make when using paper cups and a string telephone?

• Sound waves move more easily through taut string than slack string.
• Sound waves travel faster in air than in string.
• Taut string absorbs sound waves better than slack string.
• Sound waves cannot travel through string at all.