INTRODUCTION - Chapter 13 Sound class 8 ncert solutions Science - SaraNextGen [2024-2025]

Updated By SaraNextGen

On April 24, 2024, 11:35 AM

Question 1:

Choose the correct Answer.

Sound can travel through

(a) gases only (b) solids only

(c) liquids only (d) solids, liquids and gases.

Answer:

(d) Sound can travel through solids, liquids, and gases.

Sound requires a medium to travel through. Solid, liquid and gas provide the medium for sound. Hence, sound can travel through solids, liquids and gases.

Question 2:

Which of the following voices is likely to have minimum frequency?

(a) Baby girl (b) Baby boy

(c) A man (d) A woman

Answer:

(c) A man

The voice of an adult man is of lower pitch in comparison to the voices of a baby boy, a baby girl and a woman. Since frequency of a sound is directly proportional to its pitch, man’s voice is of minimum frequency in comparison to a boy, a girl, or a woman’s voice.