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Lakhmir Singh Solutions for Class 7 Science Chapter 18 Wastewater Story - PDF

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VSAT 2023

Download Lakhmir Singh Solutions for Class 7 Science Chapter 18 Wastewater Story Free PDF

Class 7 Science Chapter 18 introduces students to the concept of wastewater and its management. They will learn how modern establishments generate different types of wastewater and how they are treated before releasing it.

To understand the concepts and scientific principles of this chapter, refer to the Lakhmir Singh Solutions for Class 7 Science Chapter 18 framed by our subject experts at Vedantu. Find out how the experts have answered the exercise questions to enhance your exam preparation.

Last updated date: 20th Sep 2023
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Importance of Lakhmir Singh Class 7 Science Chapter 18 Wastewater Story

This chapter holds immense significance in developing a conceptual foundation related to pollution, wastewater management, and its various aspects. Students will learn the definitions and descriptions of wastewater and the processes involved in treating it.

It will explain what wastewater is and how it is formed from different sources. The contaminants and impurities of wastewater will also be explained along with their sources. Students will become aware of how wastewater can harm the environment if not treated before release.

They will also learn how different impurities are treated and wastewater is made safer to release in nature for automatic recycling. They will find out how certain impurities emerge in water and how they affect the natural factors of the ecosystem.

This chapter will explain how wastewater can cause various diseases. The source of waterborne diseases will also be explained in this chapter with proper description. Students will learn how to get rid of such diseases. They will also understand the importance of safe water for drinking and other household uses.

This chapter will proceed to explain what sewage is and how wastewater management is done in big cities. Villages and suburban areas are not the prime contributors of wastewater. Industrial areas and urban development are the prime sources of sewage water.

Thus, Chapter 18 Class 7 Science is of utmost importance as it makes students aware of how urban growth can affect the natural sources of water. They will also learn the necessary measures to take and save such sources.

Benefits of Lakhmir Singh Class 7 Science Chapter 18 Wastewater Story Solutions

  • These solutions will be the ideal study material for the students to practice the exercise questions. They will learn how to answer the fundamental questions by using the concepts explained in this chapter.

  • They will also be able to use the Lakhmir Singh Class 7 Science Chapter 18 question answers for evaluation of their preparation. By answering the questions and comparing them to these solutions, they will figure out which part of this chapter needs more focus.

  • Resolving doubts will become a lot easier with these solutions, as there is no need to wait when you can do it on your own.

Download Lakhmir Singh Class 7 Science Chapter 18 Solutions PDF

Why wait then? Get the free PDF version of these solutions for free from Vedantu. Find out how the experts have framed the answers to the questions and develop your answering skills. Learn the concepts and principles of this chapter properly by following the Ch 18 Class 7 Solutions to score more in the exams

FAQs on Lakhmir Singh Solutions for Class 7 Science Chapter 18 Wastewater Story - PDF

1. What are contaminants?

The impurities in water that cause contamination are called contaminants.

Example: Byproducts of industries.

2. What are waterborne diseases?

Diseases that originate in water bodies or wastewater sources are called waterborne diseases.

Examples: Typhoid, Cholera, etc.

3. What are saprophytes?

The microorganisms that feed on decaying plants and animals are called saprophytes. They are responsible for recycling dead organisms.

Example: Fungi.

4. What is sludge?

The solid particles that settle down during wastewater treatment are called sludge. It is decomposed and reduced to finer particles by using saprophytic bacteria. It is often used to generate biogas.

5. What are septic tanks?

It is a water-tight container buried closer to a house where sewage is collected and decomposed naturally.