SOUND YEAR4 GL

A quick back and forth motion is called .

(a)  

• vibration
• pitch
• wavelength

The graph shows the time sound takes to travel through  different material.

The information on the graph supports some of the conclusion below.  Decide if each conclusion is True or False

a. Sound takes less time to travel through solids than liquids.​ (a)  

• True
• False

Sounds takes less time to travel through liquids than gases.​ (a)  

• True
• False

Sound takes less time to travel through gases than liquid.​ (a)  

• False
• True

When Bily speaks into a cup, Saroki can hear what Bily says. If the length of the string was increased, Saroki would find that Bily’s voice sounded,,….​ (a)  

• quieter
• louder
• higher
• lower

Raj plays a trumpet. The sound is mostly carried to Raj ’s ears through........

• the trumpet

• Raj ’s arms

• Raj ’s head

• the air

The triangle makes a sound when it is hit because the triangle…

• produces electricity

• evaporates

• freezes

• vibrates

Raj hits the drum once. When Raj hits again with with less force, the sound is  

• louder

• quieter

• higher in pitch

• lower in pitch

There are four pipes with different lengths. If it is blown across the top of each pipe in the same way. The sound that each pipe makes….

• is exactly same

• is a different pitch

• is the same pitch

• is a different volume

When Lily speaks into a cup, Hiroki can hear what Lily says.

If the length of the string was increased, Hiroki would find that Lily’s voice sounded…

• louder

• quieter

• higher

• lower