NCERT Solutions Class 8 Science Chapter 10 Sound - PDF Download

NCERT solutions for class 8 science chapter 10 sound provides students with correct answers to all the in-text exercises and questions in the class 8 NCERT textbook that is aligned with CBSE board. Here, you will get the best study material, which is the NCERT solutions for class 8 science chapter 10 sound, carried out by a group of subject experts who are well-versed in the subject. By referring to and solving the NCERT solutions for class 8 science chapter 10 sound, students will be able to crack the examinations and score high marks. NCERT solutions for class 8 science chapter 10 sound is easy to access and completely dependable, with step by step instructions to understand the solutions in the simplest possible way. Practicing solutions is among the best strategies to excel in examinations.

NCERT solutions for class 8 science sound is presented in clear and easy-to-understand language for Class 8 students. By understanding the concepts, the students are encouraged to learn actively and effectively. NCERT solutions for class 8 science sound is reviewed by the experts and carefully prepared to give maximum marks in the lines of CBSE exam. NCERT solutions for class 8 science sound help students to get acquainted with the concepts mentioned in the textbook.

NCERT Solutions for Class 8 Science Chapter 10 Topics

10.1 Sound is Produced by a Vibrating Body: As discussed in class 8 science chapter 10 sound NCERT solutions, Sound is generated by a body that vibrates. When a body vibrates, the surrounding air particles vibrate as well. The air particles that are vibrating transmit the disturbance as waves, resulting in the perception of sound.

10.2 Sound Produced by Humans: As discussed in class 8 science chapter 10 sound NCERT solutions, Humans' ability to create sound is an amazing part of how we communicate and create art. Human sound creation mostly relies on the human voice and different musical instruments.

10.3 Sound Needs a Medium for Propagation: Yes, sound needs some form of medium for transmission. Since sound is a wave, it needs some form of material for transmission. A sound wave cannot travel through a vacuum. In a vacuum, there aren’t any particles to carry mechanical vibrations that form sound waves. Instead, sound waves rely on interactions between particles in a material to move energy from one place to another.

10.4 We Hear Sound through Our Ears: Yes, we can hear things through our ears. The human ear is one of the most complex sensory organs in the body. It plays a vital role in hearing. 

10.5 Amplitude: As discussed in class 8 science chapter 10 sound NCERT solutions, Time Period and Frequency of a Vibration: Amplitude is the maximum displacement from the central position of the oscillating object. It measures the distance that the oscillating object moves from the central position during a single cycle of oscillation. Time period is the time that a complete cycle of oscillation takes to complete. It is the time that it takes for the oscillating object to go back to its original position and repeat the motion. Frequency (f) refers to the number of full cycles of oscillation that occur in a second. It measures the rate at which an object oscillates or vibrates.

10.6 Audible and Inaudible Sounds: As discussed in class 8 science chapter 10 sound NCERT solutions,  An audible sound is a sound wave with a frequency that falls within the human hearing range, which is typically between 20 Hertz and 20,000 Hertz. An inaudible sound is a frequency that falls outside of the human hearing range and cannot be heard by the human ear unless specialized equipment is used.

10.7 Noise and Music: As discussed in class 8 science ch 10 ncert solutions, Noise is generally regarded as an undesirable or unpleasant sound due to its lack of order or organization. It typically consists of a wide variety of frequencies and does not possess the pleasant characteristics associated with musical accompaniment. Music, on the other hand, is a harmonious and organized collection of sounds, usually with melodies, harmonics, rhythms, and, in many cases, aesthetically pleasing.

10.8 Noise Pollution: As discussed in class 8 science ch 10 ncert solutions Environmental noise, also known as noise pollution, is unwanted or excessive sound present in the environment that has a detrimental effect on human health and ecosystems. Noise pollution occurs when the level, duration, or features of sound interfere with normal activities or exceed acceptable levels.

Key Features of Class 8 Science Chapter 10 

• Vibrating objects produce sound. In humans, the vibration of vocal cords produces sound. 

• The sound travels through a medium, such as gas, liquid, or solid, as it cannot travel in a vacuum. 

• The ears sense the vibrations of sound and send signals to the brain, which is called hearing. 

• The frequency of oscillation or the number of oscillations per second is called the frequency. 

• The frequency is expressed as hertz (Hz). The larger the amplitude of the vibration, the louder the sound. The higher the frequency, the higher the pitch, and the shriller the sound. 

• An unpleasant sound is called noise. An excessive or unwanted sound leads to noise pollution. 

• Noise pollution can cause health problems for human beings. To reduce noise pollution, it is important to try and minimise noise pollution. 

• Plantation on roadside and elsewhere can help reduce noise pollution.

• Types of waves include transverse waves and longitudinal waves. Amplitude is the size of disturbance within the medium on either side of the average value. 

• Frequency is the number of waves per second. The ear is the tube that carries sound through the body. 

• The sound travels through the inner ear and is sent to the brain through the auditory nerve.

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• NCERT solutions class 8 chapter 10 science free pdf can be beneficial for exam preparation, as they provide clear and precise answers to the questions in the textbook.

Frequently Asked Questions

Question 1: What is Sound?

Answer 1: Vibrations of objects are responsible for the generation of sound energy. This energy is transmitted as a wave through a medium such as air and is perceived by the human ear as a vibration.

Question 2: How are Sound Waves Produced?

Answer 2: The formation of sound waves occurs when an object is subjected to a vibration. This vibration disturbs the particles present in the medium, resulting in compressive and rarefied pressure waves, which travel as sound waves.