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Multiple Choices. Read each item carefully and write the letter of the best answer. 1. Sound waves do not travel through

A. solid

B. liquid C. gases D. vacuum 2. Sound waves travel faster in water than in air because water has a greater

A. density.

B. elasticity.

C. number of molecules.

D. volume.

3. When sound travels through air, the air particles. A. vibrate along the direction of wave propagation

B. vibrate perpendicular to the direction of wave propagation C. vibrate perpendicular to the direction of wave propagation

D. do not vibrate

4. When a wave travels through a medium__

A. particles are transferred from one place to another B. energy is transferred in a periodic manner

C. energy is transferred at a constant speed

D. none of the above statements is applicable

5. Sound is produced due to.

A. Friction

B. circulation C. vibration

D. refraction

D. light

6. Sound passes from one place to another in the form of B. Waves

A. Rays

C. energy

7. Sound is an example of

A. a longitudinal wave.

C. a transverse wave.

B. a wave that can travel through a vacuum.

D. a wave that does not transmit energy.

8. When sound travel through air, the air particles_

A. vibrate along the direction of wave propagation C. vibrate perpendicular to the direction of

wave propagation

B. vibrate but not in any fixed direction 9. Which medium will sound travels the fastest?

A. Solid

B. Liquid

D. do not vibrate

C. Gas

D. Vacuum

10. What happens to sound when temperature decreases? As temperature decreases:

A. articles vibrate quickly, sound travels fast.

B. particles vibrate slowly, sound travels slow.

C. As the temperature decreases, particles vibrate slowly, sound travels fast. D. As the temperature decreases, particles vibrate quickly, sound travels slow​