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

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

Edited By Irshad Anwar | Updated on Feb 16, 2024 06:22 PM IST

NCERT Solutions for Class 7 Science Chapter 16 Water A Precious Resource: Solution for Class 7th Water A precious Resource is part of NCERT Solutions for Class 7 Science. Water is a precious resource, and using it carefully is an important thing. What is groundwater? What are the causes of the depletion of the water table? These questions are answered with the help of NCERT solutions for Class 7 Science chapter 16 Water A Precious Resource. Topics like how much water is available for use on earth, what the amount of rainfall is in different regions of India, how water scarcity affects plants, etc. are discussed in the chapter. The NCERT solutions for Class 7 Science Chapter 16 Water A Precious Resource help in the preparation of exams.

For Class 7 students who are following the NCERT syllabus, the NCERT Solutions for all the subjects help in their studies. NCERT Solutions for Class 7 Science Chapter 16 Water A Precious Resource gives an explanation to nine exercise questions. Students are recommended to go through NCERT Solutions for Class 7 to score high marks in their examination. Water A Precious Resource Class 7 Solutions provides answers to each question in the NCERT textbook. Continue reading to go through the questions and answers given in NCERT Solutions for Class 7 Science Chapter 16.

NCERT Solutions for Class 7 Science Chapter 16 Water a Precious Resource

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NCERT Solutions for Class 7 Science Chapter 16 Water a Precious Resource Exercise

Class 7 Water A Precious Resource NCERT Solutions:

2. Explain how groundwater is recharged?

Answer:

The rainwater and water from water bodies get accumulated in the aquifer deep underground. Then there are some rocks which prevent further sinking of water.

In this way, groundwater is recharged.

Class 7th Science Chapter 16 Question Answer:

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

Answer:

If they will draw water from the ground more than the rechargeable amount for the long term then the water table will go down.

Class 7th Science Chapter 16 NCERT Solutions:

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

Answer:

Drip irrigation method will be very efficient in this case as water is required in good quantity for the plants.

So we can save a lot of water by this method.

Class 7 Science Chapter 16 Question Answer:

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

Answer:

The main factors responsible for the depletion of the water table are:-

(i) Increasing population so higher consumption.

(ii) Increasing industries

(iii) Agricultural activities

Class 7 Science Chapter 16 NCERT Solutions:

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 ________.

Answer:

(a) tube wells and hand pumps

(b) ice, water and vapour

(c) aquifer

(d) infiltration

Water A Precious Resource Class 7 Solutions:

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

(i) Rapid growth of industries
(ii) Increasing population
(iii) Heavy rainfall
(iv) Mismanagement of water resources

Answer:

Heavy rainfall cannot be responsible for water shortage. Instead if stored properly it can increase the groundwater level.

Water A Precious Resource Class 7 NCERT Solutions:

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.

Answer:

The total water of the world remains constant.

Class 7 Water A Precious Resource NCERT Solutions:

9. Make a sketch showing groundwater and water table. Label it.

Answer:

The required sketch is shown below:-

1659004182032

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NCERT Solutions for Class 7 Science Chapter 16 - Water a Precious Resource

The solution for Class 7th Science Chapter 16 consists of a total of nine questions, which include true/false, fill-in-the-blanks, and short theoretical-type questions. These solutions have been prepared by experts at Careers360 in a systematic and easy-to-understand manner. Students can download the Class 7 Science Ch 16 question answer in PDF format and use them offline, anytime and anywhere. Chapter 16 Science Class 7th solutions are reliable and accurate, helping students to understand the concepts thoroughly and perform better in their exams.

Water: A Precious Resource Class 7 Science Chapter 16-Topics

  • How Much Water Is Available
  • Forms Of Water
  • Groundwater As An Important Source Of Water
  • Depletion Of Water Table
  • Distribution Of Water
  • Water Management
  • What Role You Can Play
  • Effect Of Water Scarcity On Plants

Chapter-wise NCERT Solutions of Class 7 Science

NCERT Solutions for Class 7 Subject Wise

NCERT Solutions for Class 7 Maths
NCERT Solutions for Class 7 Science

Benefits of NCERT Solutions for Class 7 Science Chapter 16 Water A Precious Resource:

  • The NCERT Solutions for Class 7 Science Chapter 16 Water Precious Resources help in revising the concepts studied in the chapter.
  • The NCERT solutions for Class 7 Science Chapter 16 Water Precious Resources, help in solving homework questions.
  • You will get all the answers to Science Chapter 16 Class 7 and it will help you score good marks in your school exam.
  • Class 7th Science Chapter 16 Question Answer will also help you to understand all the concepts easily.
  • You will get all the answers to water a precious resource Class 7 and it will help you score good marks in your school exam.
  • Class 7th Science Chapter 16 Solutions PDF is easy to download and use offline.
  • Water a precious resource Class 7 questions and answers are prepared by subject experts as per the latest CBSE syllabus.

Also Check NCERT Books and NCERT Syllabus here

We hope you will ace your examination with the help of NCERT Solutions for Class 7 Science Chapter 16 Water A Precious Resource.

Frequently Asked Questions (FAQs)

1. How many questions are present in chapter 16 science class 7th?

Chapter 16 of Class 7th Science consists of a total of nine questions

2. Write the chemical name of water.

The chemical name of water is H₂O

3. What are the topics covered in NCERT Class 7 Science chapter 16?

Here are the topics covered in NCERT Class 7 Science chapter 16

  • How Much Water Is Available 
  • Forms Of Water 
  • Groundwater As An Important Source Of Water
  • Depletion Of Water Table
  • Distribution Of Water
  • Water Management 
  • What Role You Can Play
  • Effect Of Water Scarcity On Plants
4. Explain how groundwater is recharged for class 7?

Rainwater and water from other sources, like rivers and ponds, permeate the soil and fill crevices and gaps that are several feet underground. Water seeping into the ground is referred to as infiltration. Thus, this process recharges the groundwater.

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A block of mass 0.50 kg is moving with a speed of 2.00 ms-1 on a smooth surface. It strikes another mass of 1.00 kg and then they move together as a single body. The energy loss during the collision is

Option 1)

0.34\; J

Option 2)

0.16\; J

Option 3)

1.00\; J

Option 4)

0.67\; J

A person trying to lose weight by burning fat lifts a mass of 10 kg upto a height of 1 m 1000 times.  Assume that the potential energy lost each time he lowers the mass is dissipated.  How much fat will he use up considering the work done only when the weight is lifted up ?  Fat supplies 3.8×107 J of energy per kg which is converted to mechanical energy with a 20% efficiency rate.  Take g = 9.8 ms−2 :

Option 1)

2.45×10−3 kg

Option 2)

 6.45×10−3 kg

Option 3)

 9.89×10−3 kg

Option 4)

12.89×10−3 kg

 

An athlete in the olympic games covers a distance of 100 m in 10 s. His kinetic energy can be estimated to be in the range

Option 1)

2,000 \; J - 5,000\; J

Option 2)

200 \, \, J - 500 \, \, J

Option 3)

2\times 10^{5}J-3\times 10^{5}J

Option 4)

20,000 \, \, J - 50,000 \, \, J

A particle is projected at 600   to the horizontal with a kinetic energy K. The kinetic energy at the highest point

Option 1)

K/2\,

Option 2)

\; K\;

Option 3)

zero\;

Option 4)

K/4

In the reaction,

2Al_{(s)}+6HCL_{(aq)}\rightarrow 2Al^{3+}\, _{(aq)}+6Cl^{-}\, _{(aq)}+3H_{2(g)}

Option 1)

11.2\, L\, H_{2(g)}  at STP  is produced for every mole HCL_{(aq)}  consumed

Option 2)

6L\, HCl_{(aq)}  is consumed for ever 3L\, H_{2(g)}      produced

Option 3)

33.6 L\, H_{2(g)} is produced regardless of temperature and pressure for every mole Al that reacts

Option 4)

67.2\, L\, H_{2(g)} at STP is produced for every mole Al that reacts .

How many moles of magnesium phosphate, Mg_{3}(PO_{4})_{2} will contain 0.25 mole of oxygen atoms?

Option 1)

0.02

Option 2)

3.125 × 10-2

Option 3)

1.25 × 10-2

Option 4)

2.5 × 10-2

If we consider that 1/6, in place of 1/12, mass of carbon atom is taken to be the relative atomic mass unit, the mass of one mole of a substance will

Option 1)

decrease twice

Option 2)

increase two fold

Option 3)

remain unchanged

Option 4)

be a function of the molecular mass of the substance.

With increase of temperature, which of these changes?

Option 1)

Molality

Option 2)

Weight fraction of solute

Option 3)

Fraction of solute present in water

Option 4)

Mole fraction.

Number of atoms in 558.5 gram Fe (at. wt.of Fe = 55.85 g mol-1) is

Option 1)

twice that in 60 g carbon

Option 2)

6.023 × 1022

Option 3)

half that in 8 g He

Option 4)

558.5 × 6.023 × 1023

A pulley of radius 2 m is rotated about its axis by a force F = (20t - 5t2) newton (where t is measured in seconds) applied tangentially. If the moment of inertia of the pulley about its axis of rotation is 10 kg m2 , the number of rotations made by the pulley before its direction of motion if reversed, is

Option 1)

less than 3

Option 2)

more than 3 but less than 6

Option 3)

more than 6 but less than 9

Option 4)

more than 9

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