Samacheer Kalvi Class 8 Science Sound Questions - 1

Question: 1

Bats produce _____ sound during screaming.

(A) Noise

(B) Infrasonic

(C) Ultrasonic

(D) None of these

Question: 2

Unwanted sounds are called ______

(A) Music

(B) Noise

(C) Both a and b

(D) None of these

Question: 3

Sound waves travel very fast in

(A) Vacuum

(B) Liquids

(C) Metals

(D) Air

Question: 4

Find the odd one out.

(A) Violin

(B) Nadaswaram

(C) Flute

(D) Harmonium

Question: 5

The range of audible frequency for the human ear is ______

(A) 2 Hz to 2000 Hz

(B) 20 Hz to 2000 Hz

(C) 20 Hz to 20000 Hz

(D) 200 Hz to 2000 Hz

Question: 6

If the amplitude and frequency of a sound wave are increased, which of the following is true?

(A) Loudness increases and pitch is lower

(B) Loudness decreases and pitch is lower

(C) Loudness increases and pitch is higher

(D) Loudness increases and pitch is unchanged

Question: 7

Noise is produced by

(A) Regular and periodic vibrations

(B) Irregular and non periodic vibrations

(C) Regular vibrations

(D) Vibrations with high frequency

Question: 8

What kind of musical instrument is a sitar?

(A) Wind instrument

(B) Striking instrument

(C) Percussion instrument

(D) None of these

Question: 9

The amplitude of the sound wave decides it's _____

(A) Loudness

(B) Frequency

(C) Speed

(D) Pitch

Question: 10

Which of the following are the characteristics of vibrations?
i. Frequency
ii. Time period
iii. Pitch
iv. Loudness

(A) III and IV

(B) I and IV

(C) I and II

(D) II and III