Any unpleasant or loud sounds around us are called noise. Noise is produced by the irregular vibrations of the sound producing source.

The repetitive to and fro motion of an object about its mean position at regular time intervals are known as oscillation. Oscillation refers to any periodic motion which moves across the equilibrium position at a distance and repeats itself over and over for a particular period.

Label the different parts of the human ear and answer the following question. What is the function of the eardrum?

The eardrum is a thin, elastic and circular membrane that is stretched tightly is present at the end of the ear canal. The sound waves pass through the ear canal and fall on the eardrum. When these waves fall on the eardrum, the eardrum starts vibrating back and forth rapidly and pass the vibrations inside to other parts of the ear.

Label the different parts of the human ear and answer the following question. Name the three bones present in the middle ear.

Hammer, anvil and stirrup are the three bones which are present in the middle part of the ear.

E M B I B E

Study Mate Science Class 8>Chapter 13 - Sound>NUT Cracker

Subject Experts Solutions for Chapter: Sound, Exercise 1: NUT Cracker

Author:Subject Experts

Subject Experts Science Solutions for Exercise - Subject Experts Solutions for Chapter: Sound, Exercise 1: NUT Cracker

Attempt the practice questions on Chapter 13: Sound, Exercise 1: NUT Cracker with hints and solutions to strengthen your understanding. Study Mate Science Class 8 solutions are prepared by Experienced Embibe Experts.

Questions from Subject Experts Solutions for Chapter: Sound, Exercise 1: NUT Cracker with Hints & Solutions

EASY

8th CBSE

IMPORTANT

Study Mate Science Class 8>Chapter 13 - Sound>NUT Cracker>Q 6

What is noise?

EASY

8th CBSE

IMPORTANT

Study Mate Science Class 8>Chapter 13 - Sound>NUT Cracker>Q 7

What is oscillation?

EASY

8th CBSE

IMPORTANT

Study Mate Science Class 8>Chapter 13 - Sound>NUT Cracker>Q I

Label the different parts of the human ear and answer the following question.

Question Image

What is the function of the eardrum?

EASY

8th CBSE

IMPORTANT

Study Mate Science Class 8>Chapter 13 - Sound>NUT Cracker>Q I

Label the different parts of the human ear and answer the following question.

Question Image

Name the three bones present in the middle ear.

HARD

8th CBSE

IMPORTANT

Study Mate Science Class 8>Chapter 13 - Sound>NUT Cracker>Q 1

What is the time period and frequency of a pendulum that oscillates $40$ times in $4 s$ ?

EASY

8th CBSE

IMPORTANT

Study Mate Science Class 8>Chapter 13 - Sound>NUT Cracker>Q 2

What is the time period of the vibrations produced by the wings of a mosquito if it produces vibrations at an average rate of $500$ vibrations per second?

EASY

8th CBSE

IMPORTANT

Study Mate Science Class 8>Chapter 13 - Sound>NUT Cracker>Q 3

Why is noise pollution harmful to humans?

EASY

8th CBSE

IMPORTANT

Study Mate Science Class 8>Chapter 13 - Sound>NUT Cracker>Q 4

Why should sharp objects not be put inside the ears?