Sounds

Sound travel by ________.

• vibration

• sound waves

• vibration and sound waves

• radiation

Which of the following statement is correct?

I. Sound travels in a straight line until something interferes with the path.

II. When the sound waves enter a different medium it bends their actual path.

• I

• II

• Both I and II

• Neither I nor II

Mechanical movement causes the molecules within the object to vibrate.

• Fact

• Bluff

The force of vibration determines the kind of sound produced.

• Fact

• Bluff

If the vibration of an object moves slow, it produces loud sound.

• Fact

• Bluff

Answer explanation

To produce a loud sound, the vibration of an object must move fast.

What is the difference between the vibration of particles in a soft and loud sound?

I. Loud sounds will translate into more prominent waves having high amplitude.

II. Loud sounds will translate into low peak waves having low amplitude.

III. Softer sound will translate into low peak waves having high amplitude.

IV. Softer sound will translate into more prominent waves having low amplitude.

• I

• II

• III

• IV

Sound travel by ripple effect.

• Fact

• Bluff

Which state of matter sound travel fastest?

• Solid

• Liquid

• Gas

• Solid, Liquid, and Gas

Answer explanation

Sound travels fastest through solid because molecules are packed tightly together or rigidly closed to each other and there is little space in between thus the particles can move easily.

What kind of pitch and frequency is represented by the picture shown?

• High-pitched sound and low frequency

• High-pitched sound and high frequency

• Low-pitched sound and low frequency

• Low-pitched and high frequency

Answer explanation

A high pitched sound will have more waves squeezed together causing high frequency whereas a low pitched sounds will have waves further apart causing low frequency.

When there are a greater number of sound waves passing through a fixed place at a given time, it means that the frequency is high.

• Fact

• Bluff