Match the correct answer: a. Amplitude (i) shallow sound b. Lion's roar (ii) number of vibrations per second c. Frequency (iii) maximum displacement d. Chirping of birds (iv) shrill sound

a. Amplitude- (iii) maximum displacement The amplitude of a sound wave is the maximum displacement from the mean position. It is the displacement from the mean position to the extreme position. b. Lion's roar- (i) shallow sound Lion's roar is a shallow sound. The shallow sound is a low pitch sound. c. Frequency- (ii) number of vibrations per second Frequency is the number of vibrations per second. It is the reciprocal of the time period, its unit is Hertz. d. Chirping of birds- (iv) shrill sound The chirping of birds is a shrill sound. The shrill sound is a high pitch sound. a. Amplitude (iii) maximum displacement b. Lion's roar (i) shallow sound c. Frequency (ii) number of vibrations per second d. Chirping of birds (iv) shrill sound

Match the correct answer: a. Noise i. Pleasant sound b. Music ii. Unit of sound level c. Decibel iii. Unpleasant sound

a. Noise - iii. Unpleasant sound Noise is unwanted sound, which can disturb the peace of any person; it is an unpleasant sound. It comprises several frequencies and involves a random change in frequency and amplitude. b. Music - i. Pleasant sound Music is a pleasant sound, it also comprises different frequencies, but the frequencies are regularly or follow the periodic pattern. c. Decibel - ii. Unit of sound level Decibel is the unit of intensity of sound. Sound can measure with a device is called decibel meter. a. Noise iii. Unpleasant sound b. Music i. Pleasant sound c. Decibel ii. Unit of sound level

E M B I B E

I Explore 3rd EDITION A Science Textbook 8>Chapter 12 - Sound>Check Point>Q 3

EASY

8th CBSE

IMPORTANT

Earn 100

List three uses of sound.

Important Questions on Sound

EASY

8th CBSE

IMPORTANT

I Explore 3rd EDITION A Science Textbook 8>Chapter 12 - Sound>Check Point>Q 4

Sound travels fastest in - air, water or iron?

EASY

8th CBSE

IMPORTANT

I Explore 3rd EDITION A Science Textbook 8>Chapter 12 - Sound>Check Point>Q 5

Which part of the ear vibrates by sounds?

MEDIUM

8th CBSE

IMPORTANT

I Explore 3rd EDITION A Science Textbook 8>Chapter 12 - Sound>Check Point>Q 1

Match the correct answer:

a. Amplitude	(i) shallow sound
b. Lion's roar	(ii) number of vibrations per second
c. Frequency	(iii) maximum displacement
d. Chirping of birds	(iv) shrill sound