Sound And Echo

Sec 2 Science - Sound

Fill in the Blank

Sound is produced by the __________ of a source.

Fill in the Blank

Sound is a form of ______.

Multiple Choice

Sound is transmitted as a series of

• compressions and rarefactions

• crests and troughs

Fill in the Blank

A region of high pressure is called ___________.

Fill in the Blank

A region of low pressure is called ___________.

Multiple Choice

In which medium does sound travel slowest?

• solid

• liquid

• gas

• vacuum

Multiple Choice

In which medium does sound travel fastest?

• solid

• liquid

• gas

• vacuum

Multiple Choice

Why does sound travel fastest in solids?

• Particles in solid are most closely packed.

• Particles in solid are far apart.

Multiple Choice

Sound travels the slowest in gases. Why?

• Gas particles are most closely packed.

• Gas particles are far apart from one another.

Multiple Choice

When the air in the bell jar is removed completely,

• ringing sound can still be heard.

• no ringing sound can be heard.

Multiple Choice

Sound requires a _______ to travel.

• vacuum

• medium

Fill in the Blank

Air cannot travel through a ______.

Multiple Choice

The amplitude of the sound affects the ______ of the sound.

• pitch

• loudness

Multiple Choice

The higher the amplitude, the _____ the sound.

• softer

• louder

Multiple Choice

Frequency of sound is measured in

• Hertz

• decibels

• metres

• kilogram

Multiple Choice

Frequency of sound is related to the _______.

• loudness

• pitch

Multiple Choice

The higher the frequency of sound, the ______ the pitch.

• higher

• lower

Multiple Choice

What is the difference between sound wave A and B?

• A is louder than B.

• A is softer than B.

• A has a higher pitch than B.

• A has a lower pitch than B.

Multiple Choice

What is the difference between sound wave A and B?

• A is softer than B.

• A is louder than B.

• A has a higher pitch than B.

• A has a lower pitch than B.

Multiple Choice

Which is the correct range of human hearing?

• 2 Hz to 20 000 Hz

• 20 Hz to 20 000 Hz

• 200 Hz to 2000 Hz

• 20 Hz to 200 000 Hz

Fill in the Blank

Sound that has a frequency above 20 000 Hz is _______.

Multiple Choice

A loud sound is made in front of a tall building. An echo is heard 4 s after the sound is produced. If the speed of sound is 330 m/s, how far away is the building?

• 1320 m

• 660 m

• 165 m

• 82.5 m

Multiple Choice

Loudness is measured in

• dB

• Hz

• m/s

• m