Chapter 16 - Water: A Precious Resource of Class 7 Science NCERT Book (PDF) is available here for download in PDF format. Chapter 16 of Class 7 Science NCERT Books is one of the important chapters and also one of the interesting chapters. Students are advised to learn this chapter and prepare for Class 7 Science exams.
A snapshot from the chapter:
Important concepts of the chapter:
⇒ Water harvesting
⇒ Water table
⇒ Drip irrigation
Important points of the chapter:
⇒ Water is essential for all living beings. There can be no life without it.
⇒ Water exists in 3 forms: solid, liquid and vapour.
⇒ Though water is maintained by the water cycle, yet there is an acute scarcity of water in many parts of the globe.
⇒ There is an uneven distribution of water. Much of it has resulted from human activities.
⇒ The rapid growth of industries, increasing population, growing irrigation requirements and mismanagement are some of the causes for water shortage.
⇒ We need to be worried about the wastage during the supply of water through pipes, the leaking taps in buildings and other places.
⇒ Unnecessary use of water and overdrawing from groundwater should be avoided. Recharge of water to the ground should be increased.
⇒ The need of the hour is that every individual uses water economically.
⇒ Plants wilt and ultimately dry up if they are not watered for a few days.