NCERT Class 7 Science Water A Precious Resource

Read and download NCERT Class 7 Science Water A Precious Resource in NCERT book for Class 7 Science. You can download latest NCERT eBooks chapter wise in PDF format free from Studiestoday.com. This Science textbook for Class 7 is designed by NCERT and is very useful for students. Please also refer to the NCERT solutions for Class 7 Science to understand the answers of the exercise questions given at the end of this chapter

NCERT Book for Class 7 Science Chapter 16 Water A Precious Resource

Class 7 Science students should refer to the following NCERT Book Chapter 16 Water A Precious Resource in Class 7. This NCERT Book for Class 7 Science will be very useful for exams and help you to score good marks

Chapter 16 Water A Precious Resource NCERT Book Class 7

16 Water: A Precious Resource 

Jal Hai, To Kal Hai”

“If you have water, you can think of the future”

You are perhaps aware that 22 March is celebrated as the world water day! A school celebrated ‘water day’ and invited posters from the children of your age group. Some of the posters presented on that day are shown in Fig. 16.1. What is the message you get from these posters? Write your observations in your notebook and discuss them in the class.

Have you ever felt a shortage of water at home or at school? Your parents or teachers must very often be advising you not to waste water. No wonder we celebrate water day every year to attract the attention of everybody towards the importance of conserving water.

The amount of water recommended by the United Nations for drinking, washing, cooking and maintaining proper hygiene is a minimum of 50 litres per person per day. This amount is about two and a half buckets of water per person per day. Is your family getting at least this much of water? If yes, you should consider yourself fortunate because millions of people in our country do not get enough water. What about your friends and their families? Share your experience with them. In some places there is an acute shortage of water. Taps running dry, long queues for water (Fig. 16.2), fights, marches and protests for demand of water have become a common sight, especially during summers. Some of the newspaper clippings shown in Fig. 16.3 clearly indicate this message. Is it not true that we face acute shortage of water?

16.1 HOW MUCH WATER IS AVAILABLE

Look at the picture of the earth taken from space. Why does it appear blue? Surely, you can guess! You are aware that about 71% of the earth’s surface is covered with water. Almost all the water on the earth is contained in the seas and oceans, rivers, lakes, ice caps, as groundwater and in the atmosphere. However, most of this water is not fit for human consumption. The water that is fit for use is freshwater. Perform the following activity to estimate roughly the relative amount of water available in some of these sources.

Exercises

1. Mark ‘T’ if the statement is true and ‘F’ if it is false:

(a) The freshwater stored in the ground is much more than that present in the rivers and lakes of the world. (T/F)

(b) Water shortage is a problem faced only by people living in rural areas. (T/F)

(c) Water from rivers is the only source for irrigation in the fields. (T/F)

(d) Rain is the ultimate source of water. (T/F)

2. Explain how groundwater is recharged?

3. There are ten tubewells in a lane of fifty houses. What could be the long term impact on the water table?

4. You have been asked to maintain a garden. How will you minimise the use of water?

5. Explain the factors responsible for the depletion of water table.

6. Fill in the blanks with the appropriate answers:

(a) People obtain groundwater through________ and ________.

(b) Three forms of water are ________, ________ and ________.

(c) The water bearing layer of the earth is ________.

(d) The process of water seepage into the ground is called ________.

7. Which one of the following is not responsbile for water shortage?

(i) Rapid growth of industries

(ii) Increasing population

(iii) Heavy rainfall

(iv) Mismanagement of water resources

8. Choose the correct option. The total water

(i) in the lakes and rivers of the world remains constant.

(ii) under the ground remains constant.

(iii) in the seas and oceans of the world remains constant.

(iv) of the world remains constant


Please refer to attached file for NCERT Class 7 Science Water-A Precious Resource

Chapter 01 Nutrition in Plants
NCERT Class 7 Science Nutrition in Plants
Chapter 02 Nutrition in Animals
NCERT Class 7 Science Nutrition in Animals
Chapter 03 Fibre to Fabric
NCERT Class 7 Science Fibre to Fabric
Chapter 05 Acids, Bases and Salts
NCERT Class 7 Science Acids Bases and Salts
Chapter 06 Physical and Chemical Changes
NCERT Class 7 Science Physical and Chemical Changes
Chapter 07 Weather, Climate and Adaptations of Animals to Climate
NCERT Class 7 Science Weather Climate and Adaptation
Chapter 08 Winds, Storms and Cyclones
NCERT Class 7 Science Winds Storms and Cyclones
Chapter 10 Respiration in Organisms
NCERT Class 7 Science Respiration in Organisms
Chapter 11 Transportation in Animals
NCERT Class 7 Science Transportation in Animals
Chapter 12 Reproduction in Plants
NCERT Class 7 Science Reproduction in Plants
Chapter 13 Motion and Time
NCERT Class 7 Science Motion and Time
Chapter 14 Electric Current and its Effects
NCERT Class 7 Science Electric Current and its Effects
Chapter 16 Water: A Precious Resource
NCERT Class 7 Science Water A Precious Resource
Chapter 17 Forests: Our Lifeline
NCERT Class 7 Science Forests Our Lifeline
Chapter 18 Wastewater Story
NCERT Class 7 Science Wastewater Story

Science NCERT Book Class 7 Chapter 16 Water A Precious Resource

The above NCERT Books for Class 7 Science Chapter 16 Water A Precious Resource have been published by NCERT for latest academic session. The textbook by NCERT for Chapter 16 Water A Precious Resource Science Class 7 is being used by various schools and almost all education boards in India. Teachers have always recommended students to refer to Chapter 16 Water A Precious Resource NCERT etextbooks as the exams for Class 7 Science are always asked as per the syllabus defined in these ebooks. These Class 7 Chapter 16 Water A Precious Resource book for Science also includes collection of question. We have also provided NCERT solutions for Class 7 Science which have been developed by teachers of StudiesToday.com after thorough review of the latest book and based on pattern of questions in upcoming exams for Class 7 students.

NCERT Book Class 7 Science Chapter 16 Water A Precious Resource

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Chapter 16 Water A Precious Resource NCERT Book Class 7 Science

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Class 7 Science Chapter 16 Water A Precious Resource NCERT Book

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Class 7 Chapter 16 Water A Precious Resource NCERT Book Science

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