Case Study Questions for Class 8 Science Chapter 13 Sound

by
  • Last modified on:5 months ago
  • Reading Time:7Minutes
Home CBSE Class 8 Science Case Study Qs Ch 13 Sound
Looking for high-quality practice material for Chapter 13? You’re in the right place. Below, we are providing Case Study Questions for CBSE Class 8 Science Chapter 13: Sound. These passage-based questions are perfectly aligned with the latest syllabus to help students practice competency-based learning. Read through the provided passages, test your understanding of wave properties and human hearing, and check your answers using the explanations provided!

Case Study Questions for Class 8 Science Chapter 13 Sound

1 Case Studies · 4 Questions · With Answer & Explanation
1

Case Study: Sound and Its Characteristics

Read the passage carefully, then answer all four questions
Ch 13 · Sound

Sound plays an important role in our life. It is a form of energy which makes us hear. Vibrating objects produce sound. Vibration is the to and fro or back and forth movement of an object. Sound needs a medium to travel. Hence, it cannot travel in a vacuum.

Human beings have a voice box or larynx which is present in their throat on the upper side of the windpipe. The larynx has two vocal cords which have a narrow slit between them so that air can pass through it. As the lungs throw the air out of the windpipe, it passes through the slit and hence allows the production of sound as the vocal cords start vibrating.

Since sound travels in the form of waves, it is important to study about characteristics of waves. The three main properties of waves are Amplitude, frequency, and time period. The magnitude of disturbance in the medium on either side of the mean value is called as Amplitude(A). Larger the amplitude, louder the sound. The number of oscillations/vibrations per second is called frequency, which is expressed in Hertz (Hz). Time taken for one complete oscillation/vibration is the time period.

i
Which part of the human throat is responsible for the voice produced by a human?
a Trachea
b Larynx
c Pharynx
d Esophagus
Correct Answer (b) Larynx ✅
Explanation

The passage states that human beings have a voice box or larynx which is present in their throat and is responsible for producing sound through vibrating vocal cords.

ii
The form of energy which enables us to hear:
a Light
b Heat
c Sound
d Electricity
Correct Answer (c) Sound ✅
Explanation

According to the text, sound is explicitly defined as a form of energy that makes us hear.

iii
The rapid to and fro or up and down movement of an object from its mean position:
a Translation
b Rotation
c Vibration
d Locomotion
Correct Answer (c) Vibration ✅
Explanation

The passage defines vibration as the to and fro or back and forth movement of an object.

iv
The maximum displacement of a vibrating object from its mean position:
a Frequency
b Time period
c Wavelength
d Amplitude
Correct Answer (d) Amplitude ✅
Explanation

The magnitude of disturbance in the medium on either side of the mean value (the maximum displacement) is called Amplitude (A).

Related Posts

Case Study Questions for Class 8 Science Chapter 14 Chemical Effects of Electric Current
Case Study Questions for Class 8 Science Chapter 12 Friction
Case Study Questions for Class 8 Science Chapter 11 Force and Pressure
Case Study Questions for Class 8 Science Chapter 10 Reaching the Age of Adolescence
Case Study Questions for Class 8 Science Chapter 9 Reproduction in Animals
Case Study Questions for Class 8 Science Chapter 7 Conservation of Plants and Animals
Case Study Questions for Class 8 Science Chapter 6 Combustion and Flame
Case Study Questions for Class 8 Science Chapter 5 Coal and Petroleum
Case Study Questions for Class 8 Science Chapter 2 Microorganisms-Friend and Foe
Case Study Questions for Class 8 Science Chapter 1 Crop Production and Management

Category Lists (All Posts)

Select Category

All categories of this website are listed below with number of posts in each category for better navigation. Visitors can click on a particular category to see all posts related to that category.

Test Series (Engineering, Medical and School Level Exams)

Test series for students preparing for Engineering & Medical Entrance Exams are available. We also provide test series for School Level Exams. Tests for students studying in CBSE, ICSE or any state board are available here. Just click on the link and start test.

Click here for All Tests

Leave a Reply

Join Telegram Channel

Editable Study Materials for Your Institute - CBSE, ICSE, State Boards (Maharashtra & Karnataka), JEE, NEET, FOUNDATION, OLYMPIADS, PPTs

Download Now!

Discover more from Gurukul of Excellence

Subscribe now to keep reading and get access to the full archive.

Continue reading