CBSE Class 7 Science Water A Precious Resource Assignment

Class 7 Science Practice Assignments: CBSE Class 7 Science Water A Precious Resource Assignment

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Water - A Precious Resource 

ACTIVITY- 16.1 ` 
 
Question 1- Name three activities by which water is being wasted? 
Answer- Cleaning of houses and animals, washing car and opening tap during brushing our teeth. 
 
Question 2- Should we check the wastage of water and why? 
Answer- Yes, because there are very limited sources of fresh water on earth. 
 
Question 1- ________ is the process by which water is converted from its liquid state to a gaseous state. 
Answer- Evaporation.  
 
Question 2- ________ is the process by which water is converted from its gaseous state to a liquid state. 
Answer- Condensation. 
 
ACTIVITY- 16.2 
 
Question 1- Which beaker represents the underground water? 
Answer- Beaker ‘C’. 
 
Question 2- Which beaker represents the surface water? 
Answer- Water remained in beaker ‘A’. 
 
EXERCISE 
 
Question 1- Fill In The Blanks : 
 
(i). The water we drink is in liquid state. 
 
(ii). The process of seeping of water into the soil is called infiltration. 
 
(iii). The upper level of ground water is called water-table. 
 
(iv). Water management means dealing with water in the best possible ways. 
 
(v). A farmer can use water economically in the field, by drip irrigation. 
 
 
Question 2- Write True Or False. 
 
(i). Water cycle helps in maintaining water on the earth. (True) 
 
(ii). About 97% of total water present on the earth is fresh water. (False) 
 
(iii). Repair leaking taps and pipes at the earliest. (True) 
 
(iv). We are quickly moving towards global water crisis. (True)
 
(v). Turn on taps while brushing. (False) 
 
 
Question 3- Match The Column:-
 
 Column I                           Column II
(i) Ice                               (a). Oceans and sea
(ii) Saline water                 (b). Rivers and ponds
(iii) Fresh water                 (c). Gaseous state of water
(iv) Water vapour              (d). Purest form of water
(v) Rain water                   (e). Solid state of water
 
 
Question 4. Choose One Option For The Follwing.
 
(i). Which of the following is responsible for depletion of ground water?
 
a) Increasing population
b) Increasing industries
c) Deforestation
d) All of these (✓)
 
(ii). The Punjab preservation of subsoil water act was passed in the year:
 
a) 2009 (✓)
b) 2010
c) 200l
d) 2015
 
(iii). The world water day is celebrated every year on:
 
a) 22 April
b) 24 March
c) 22 March (✓)
d) 22 May
 
(iv). Oceans and sea cover about ………. of the earth surface.
 
a) 75%
b) 71%
c) 97% (✓)
d) 29%
 
(v). We should not keep taps running while:
 
a) Brushing
b) Shaving
c) Bathing
d) All of these (✓)
 
 
Question 5- Very Short Answer Type Questions.
 
(i) What do you mean by ground water?
Answer- Groundwater is the water present below the earth’s surface in the cracks and spaces in soil, sand and rocks.
 
(ii) Why is sea and ocean water not fit for drinking?
Answer- Because sea and ocean water have large amounts of dissolved salts.
 
(iii) Define aquifers.
Answer- Groundwater present between the layers of hard rocks below the water table is known as aquifer.
 
(iv) Name the three states of water.
Answer- Solid, liquid and gas.
 
(v) How is groundwater recharged?
Answer- Rainwater and water from other sources such as rivers and ponds seeps into the soil due to gravity until the empty spaces and cracks deep below the ground are filled with water. This process is known as infiltration. Hence groundwater gets recharged.
 
 
Question 6- Short Answer Type Questions.
 
(i) Enlist some activities by which water is being wasted by people.
Answer- Water is being wasted by people in cleaning of houses and animals, washing car and opening taps during brushing teeth.
 
(ii) How will you minimize the use of water to maintain a garden?
Answer- We should water the garden early in the morning and late afternoon taking shorter showers. We should reuse the waste water of cleaning purposes in watering the plants.
 
(iii) How is water important to us?
Answer-
(1). About 70% of human body consists of water.
(2). Water helps to control our body temperature.
(3). Water helps to excrete waste products from our body.
(4). Water is important for growth of plants.
(5). Water maintains the temperature of earth.
(6). Water is essential for our many daily life activities.
 
(iv) How increase in human population is leading to depletion of water table?
Answer- As the human population increase, consumption of water by them increases for their daily activities.Often groundwater is used for construction of houses, shops and roads etc. Hence groundwater is used at high rate, but the area for seepage of water decreases. So water table is depleted by growth in human population.
 
(v) Why do plants wilt and finally dry up if they do not get water for some days?
Answer- Plants use water in photosynthesis. Also plants lose some water by transpiration. So if plants do not get water for some days, they wilt and finally dry up.
 
 
Question 7- Long Answer Type Questions.
 
(i) What steps will you take to save water?
Answer-
(1) Make efforts to stop the leakage of water from taps and water pipes.
(2) Turn off taps while brushing or shaving.
(3) Mop the floor instead of washing, reuse the waste water to water the plants.
(4) Water the garden early in the morning and late afternoon taking shorter showers.
(5) Wash vegetables and fruits in big containers and use this water for cleaning or watering the plants.

 

More Question

Q.1 Fill in the blanks

1. 22 March is celebrated as the ‘World ____________ day’.

2. _____% of the Earth’s surface is covered with Water.

3. _____________ was the traditional way of collecting water.

4. Water exists in three forms : (i)_________________, (ii) _____________ and (iii) ___________.

5. Water management is a practice to minimize ____________ of water.

Q.2 State whether True of False :

1. Infiltration is the process of seeping of water into the empty spaces of ground.

Ans. ______________

2. Collection and conservation of rainwater from the rooftop of buildings and industries is known as rainwater harvesting.

Ans. ______________

3. 30 March is celebrated as the World Water Day.

Ans. ______________

4. We can drink sea water because of its salt content.

Ans. ______________

5. The process of infiltration recharges the groundwater.

Ans. ______________

Q.3. Write some methods to conserve water at home :

Answer :

1. Moping floor instead of washing.

2. Washing vehicles using bucket.

3. ______________________________________________________________

4. ______________________________________________________________

5. ______________________________________________________________

6. ______________________________________________________________

7. ______________________________________________________________

 

Please refer to attached file for Water - A Precious Resource

Free study material for Science

Download Practice Assignments: Class 7 Science Chapter 16 Water A Precious Resource

Revision Assignment: Chapter 16 Water A Precious Resource (CBSE)

Review targeted chapter assignments for Class 7 Science Chapter 16 Water A Precious Resource. Built according to official CBSE guidelines, these downloadable problem sets help students build accuracy and prepare effectively for school tests.

Key Advantages of Solving Chapter 16 Water A Precious Resource Assignments

  • Exam Alignment: Questions strictly follow contemporary CBSE sample papers and grading schemes.
  • Comprehensive Coverage: Features objective drills, case studies, and structured descriptive problems for Chapter 16 Water A Precious Resource.
  • Pacing & Precision: Regular problem-solving builds critical calculation speed and test-taking accuracy.

How to Approach Science Chapter 16 Water A Precious Resource Assignments

  1. Concept Foundation: Review the NCERT book for Class 7 Science thoroughly before diving into assignment tasks.
  2. Self-Evaluation: Solve exercises independently before inspecting professional answer guides.
  3. Progress Monitoring: Note down complex formulas or concepts, clearing them up using available online practice aids.

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Yes. These assignments are designed as per the latest CBSE syllabus for 2026. We have included huge variety of question formats such as MCQs, Case-study based questions and important diagram-based problems found in Chapter 16 Water A Precious Resource.

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