1.Which of the following is transmitted when sound travels from one medium to another?
A.air
B.density
C.energy
D.molecules


2.Which od the following has the greatest on sound in air?
A.amplitude
B.frenquency
C.temperature
D.wavelegth


3.Which of the following is important for the propagation of sound?
A.distance
B.light
C.medium
D.space


4.What other factor aside from the elasticity of the material affects the speed of sound?
A.density
B.inertia
C.mass
D.volume


5.Why does spund travel faster in wood than in water?
A.There are more molecules in wood than in water.
B.The molecules in wood are bigger compared to the molecules in water.
C.The molecules in water cokide ramdomly,hence sound can easily be transmitted.
D.The molecules in wood are tightly packed against each other ,hence sound can be propagated easily.


6.How fast does sound wave travel at sea level if the temperature is 20oC?
A.343 m/s
B.445 m/s
C.544 m/s
D.653 m/s


7.The speed of sound in steel is 5960 m/s while its speed in air is 331 m/s. How fast does sound travel in steel than in air?
A.18 times in air
B.20 times in air
C.22 times in air
D.25 times in air


8.What happen to speed of sound as the temperature increases?
A.constant
B.decreases
C.inceases
D.zero


9.Why does sound travel faster at high temperatures?
A.Because sound his louder at higher temperatures.
B.Because the moleciles of air become tighty packed.
C.Because there are more molecules in the hotter surronding.
D.Because air molecules have moee energy and vibrate faster at a higher temperature.


10.it the temperature is-10oC,what is the speed of sound?
A.325 m/s
B.535 m/s
C.625 m/s
D.735 m/s


11.How do nocturnal animals such as bats find their food source even at night?
A.echo location
B.falpping
C.randar
D.sonar


12.How is an echo producted?
A.lt is produced when sound is transmitted through a surface.
B.lt is prouduced when sound is reflceted from a distant surface.
C.lt is produced when the sound changes speed when it srikes a distant surface.
D.The above statement are all correct.​