Chapter 18 of Class 7th science is about the story of wastewater. Water is essential to everyone's existence. The chapter briefly discusses the process of converting wastewater into usable water, as well as the steps to reuse and recycle wastewater. Each subtopic in Science Chapter 18 aids students in gaining a quick understanding of all the significant ideas.
Topics Covered in Class 7 Science Chapter 18 Wastewater Story
Following are the topics and sub-topics covered in this chapter.
|1||Introduction to Wastewater Story|
|2||Water - Our Lifeline|
|3||What is sewage?|
|4||Water Freshens Up- An Eventful Journey|
|5||Wastewater Treatment Plan|
|6||Collection Of Wastewater|
|7||Physical Treatment (screening)|
|8||Primary Treatment of wastewater|
|9||Secondary Treatment of wastewater|
|11||Better housekeeping practices|
|12||Alternative arrangement of sewage disposal|
|13||Sanitation at Public Places|
Wastewater Story discusses the significance of water, the journey of wastewater, and wastewater treatment methods. It also discusses wastewater treatment facilities with different structures for sewage disposal and sanitation in public locations.
It talks about wastewater as the liquid waste produced by families, companies, and enterprises, comprising of vegetable waste, chemicals, and other potentially dangerous matter. It is emptied into natural water bodies via a network of sewage pipes, contaminating natural water supplies.