1.Which of the following sounds is pleasant to the ears?It is a____.
a.traffic jams
b.river flowing
c.disco in gym
d.jack hammer used by workers
2.What do sound waves need in order to transmit?
a.medium
b. someone to make it
c.sounds
d.vibratoins
3.Which object blocks the from passing to transmit?
a.curtain
b.insulatoin foam
c.metal
d.water
4.Which of the following is NOT a sound property?
a.loudness
b.pitch
c.quality
d.vibrations
5.What do you call the sound that is loud, unpleasant and causes disturbance?
a. enjoyable
b.harmonious
c.instrumental
d.noise
6.If the guitar uses a thinner string,what kind of sounds will it produse?
a.higher pitch
b.lower pitch
c.high pitch
d.low pitch
7.Which sounds becomes unhelpful to us?Sound that_____.
a.helps deliver information
b.will disturb people who are sleeping at night
c.can engage us towards others about what we feel
d.gives us warning signals like ringing of bells in school
8.Which group of objects can absorb sound?
a.elastic,metal,wood
b.aluminum,metal,wood
c.blanket,curtain,egg cartoon
d.concrete wall,ear plug,insulation foam
9.what property of sounds refers to the shape of the sound waves an object produce?
a.harmony
b.loudness
c.pitch
d.quality
10.Which following is example of an unpleasant sound?
a.jack hammer use by the workers
b.bird chirping on a tree.
c.waves of the sea
d.river flowing