Write true or false for each statement:

(a) Sound can travel in vacuum.

(b) Sound is a form of energy.

(c) Sound can only be produced by vibrating bodies.

(d) Larger is the amplitude, feeble is the sound.

(e) The frequency is measured in hertz.

(f) Loudness depends on frequency.

(g) Waveforms of two different stringed instruments can be the same.

(h) Female voice is shriller than the male voice.

(i) A ticking clock sound is heard late when heard through a metal.

Fill in the blanks:

(a) Sound is produced when a body …………… .

(b) The number of times a body vibrates in one second is called its …………… .

(c) The pitch of a sound depends on its …………… .

(d) Sound can travel in …………… .

(e) We can hear sounds of frequency in the range of …………… .

(f) Sound requires a …………… for propagation.

(g) Sound travels faster in …………… than in liquids.

(h) The sound heard after reflection is …………… .

(i) …………… produces sensation in ears.

We can distinguish a shrill sound from a flat sound by its:

1. amplitude
2. loudness
3. pitch
4. none of the above

We can hear sound of frequency:

1. 10 Hz
2. 500 Hz
3. 100,000 Hz
4. 50,000 Hz