Solutions of Sound from 1 Explore: A Science Textbook 8
Shobhita Johari Science Solutions from Chapter 12 - Sound
Shobhita Johari, Pankaj Tyagi and, Parminder Chopra's 1 Explore: A Science Textbook 8 detailed solutions to all the exercises of Sound for 8th CBSE are provided here. The topics covered are such as Sound, Noise and, Vibrations. The points to remember in the Shobhita Johari, Pankaj Tyagi and, Parminder Chopra's Book Solutions is ideal for quick revision.
Practice Other Topics from Sound
This topic provides knowledge about sounds that we hear or produce in our daily lives. There are different sounds; we produce some of them through our throats and hear some from our ears. We learn that sounds can be pleasant as well as unpleasant.
The topic defines vibrations and elucidates the properties on which it works, along with examples. Musical instruments are classified based on their vibrating parts and the way they produce sound. Four activities are given for students to try.
This topic highlights the human voice and how it is produced. We learn that the human voice is also based on the principle of vibration. It discusses the whole mechanism of sound production through the voice box in our throat.
The topic focuses on the medium of propagation of sound. Sound can travel through all three mediums, solid, liquid, and gas. There are activities to show and explain the circulation of sound in different mediums.
This topic talks about the detection of sound through our ears. We learn about the ear structure, divided into three parts and its role as a sound detector. It also alerts us and gives precaution for taking care of our ears.
In this topic, we are going to study the characteristics of sound. It discusses the parameter on which sound is distinguished. The parameters highlighted are one complete vibration, amplitude, time period, and frequency.
This topic gives exposure to the loudness of sound. It defines the term loudness that is based on the amplitude of the sound. Several examples are given to show the loud sounds. Loud sounds and soft sounds are also compared.
The topic explores the pitch of a sound. Whether a sound is shrill or shallow depends on its frequency. There is a comparative study between shrill and shallow sounds based on their characteristics. A few examples of shrill sounds are also given.
The topic discusses audible and inaudible sounds. Audible or inaudible sounds are recognised based on the frequency range they come in. Human ears have a hearing limitation as per the frequency range. We learn about ultrasonic and infrasonic sounds.
The topic provides knowledge about musical sounds and why they are called so. There are examples of sounds, which we can put in this category. Musical sounds are pleasant sounds. A list naming few famous musicians from India is provided.
This topic calls attention to the sounds that may be characterised as noise. Noise can create discomfort, and its description can vary person-to-person. There is a list highlighting the differences between noise and musical sound.
The topic focuses on noise pollution, its causes, and its sources. Different sources like road traffic, rail traffic, air traffic, industrial noises, domestic noises, recreational noises, and household noises are identified.
This topic explores the means to reduce and control noise pollution. It suggests that reducing noise pollution is a team project; a few rules and regulations cannot govern it. There are few steps provided to curb noise pollution.
