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Class 7 Science MCQ Questions of Water: A Precious Resource with Answers?

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Class 7 Science MCQ Questions of Water: A Precious Resource with Answers gave here covers Questions on the significance of water, natural mindfulness, the idea of the water cycle, a wellspring of groundwater, issues of water shortage across various areas we mean all syllabus. MCQ Questions for Class 7 Science given here center more around information building and help the students to have a more profound comprehension of the ideas. You can check the nitty-gritty detailed solutions of MCQ Questions for class 7 Science. 

Access the MCQ Questions with Answers of Class 7 Science and get a decent grasp on the ideas subsequently endeavor the test with certainty. Class 7 Science MCQ Questions of Light with Answer helps students to have more grounded nuts and bolts and covers all the concepts of Science. This might help you to understand and check your insight about the parts.

Practice MCQ Questions for Class 7 Science

1. On which day the world water day is celebrated?

(a) 23rd March
(b) 22nd March
(c) 21st March
(d) None of these

2. Which year was observed as International Year of Fresh Water?

(a) 2003
(b) 2004
(c) 2006
(d) 2002

3. Which of the following does not show water shortage?

(a) Taps running dry
(b) Long queue for getting water
(c) Marches and protests for demand of water
(d) A family gets three buckets of water per person per day

4. Seas and oceans are full of water on earth. However, a very small percentage of water present on earth is available for us. This percentage is roughly

(a) 0.006%
(b) 0.06%
(c) 0.6%
(d) 6% 

5. Which of the following is a way to use water economically?

(a) construction of bawris
(b) Rainwater harvesting
(c) Drip irrigation
(d) Infiltration

6. The amount of water recommended by the United Nations for drinking, washing, cooking and maintaining proper hygiene per person per day is a minimum of

(a) 5 litres
(b) 15 litres
(c) 30 litres
(d) 50 litres

7. “Every Drop Counts” is a slogan related to

(a) counting of drops of any liquid
(b) counting of water drops
(c) importance of water
(d) importance of counting

8. Water cycle does not involve which of the following?

(a) Evaporation
(b) Condensation
(c) Formation of clouds
(d) Rainwater harvesting

9. Which of the following inhibits the seepage of rainwater into ground?

(a) A pukka floor
(b) playground
(c) Grass lawn
(d) Forest land

10. The cause of depletion of water table is:

(a) increasing industries
(b) water table
(c) rain water
(d) none of these

11. Steam is which form of water?​

(a) solid
(b) liquid
(c) gas
(d) none of these

12. Snow and ice, are present as ________ at the poles of the earth, snow-covered mountains, and glaciers.

(a) liquid form
(b) the solid form  
(c) the gaseous form
(d) none of the above

13. The solid parts of the earth’s crust called:

(a) atmosphere
(b) lithosphere
(c) hydrosphere
(d) none of these

14. Which of the following is a way to use water economically?

(a) construction of bawris
(b) Rainwater harvesting
(c) Drip irrigation
(d) Infiltration

15. The process of ground water getting stored between the layers of hard rock below the water table is known as

(a) Infiltration
(b) Aquifer
(c) Water table
(d) Bawri

16. River Yamuna is polluted near Delhi due to

(a) Thermal plant on its bank
(b) Water animals
(c) Addition of untreated sewage
(d) Rivers joining it

17. The traditional way of collecting water was:

(a) bawaris
(b) well
(c) rivers
(d) none of these

18. Plants loose water in form of

(a) Liquid
(b) Gases
(c) Snow
(d) Water vapour

19. Main source of water on earth is:

(a) rain
(b) snow
(c) glaciers
(d) all the above

20. The water below the ground is known as

(a) groundwater
(b) pure water
(c) polluted water
(d) none of these

21.  Earth appear blue from sky due to presence of

(a) Desert
(b) Mountains
(c) Land
(d) Water 

22. The process of seeping of water into the ground is called

(a) Infiltration  
(b) Aquifer
(c) Water table 
(d) Bawri

23. Water is chlorinated to

(a) Kill germs
(b) Change colour
(c) Soften it
(d) Improve its taste

24. Addition of harmful substance in water leads to

(a) Algal bloom
(b) Microbial growth
(c) High oxygen demand
(d) Water pollution

25. The process of changing water vapour into water is called

(a) Boiling
(b) Condensation
(c) Evaporation
(d) Sedimentation

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Answer:

1. Answer: (b) 22nd March 

Explanation: World Water Day is an annual United Nations (UN) observance day held on 22 March that highlights the importance of fresh water. The day is used to advocate for the sustainable management of freshwater resources.

2. Answer: (a) 2003

Explanation: Year 2003 was observed as the International Year of Freshwater to make people aware of this dwindling natural resource.

3. Answer: (d) A family gets three buckets of water per person per day

Explanation:  Water shortage is the lack of sufficient available water resources to meet the demands of water usage within a region.There seems no water shortage as three buckets of water per person is enough for satisfying their daily needs.

4. Answer: (a) 0.006%

Explanation:The total amount of fresh water available for use is about 0.006% of the total water present on earth as about 97.4% of the total water on earth is in seas and ocean and 2% water is present in the form of glaciers and in polar ice caps.

5. Answer: (c) Drip irrigation

Explanation: One such traditional practice listed above is construction of bawris which is actually constructing deep wells followed by steps made by mud deep in the ground. These bawris would get filled with water whenever there is rain and hence was used by villagers to carry out their daily chores and to collect water.

6. Answer: (d) 50 litres

Explanation: 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.

7. Answer: (c) importance of water

Explanation: Every drop counts' is the slogan related to the importance of water. Water is very important for humans as well as for animals. But fresh water is less than one percent of water available on the Earth.

8. Answer: (d) Rainwater harvesting

Explanation: Liquid water evaporates into water vapor, condenses to form clouds, and precipitates back to earth in the form of rain and snow. The water cycle does not involve rainwater harvesting as it is the collection and storage of rain, rather than allowing it to run off.

9. Answer: (a) A pukka floor

Explanation: A pukka floor is a cement floor which is impenetrable to water. Hence water cannot seep through the pukka floor.

10. Answer: (a) increasing industries

Explanation: Every industry requires water in its production process. As a number of industries increases, more water is drawn from the ground. All of this result in depletion of the water table.

11. Answer: (c) gas

Explanation: Steam is water in the gas phase. Steam that is saturated or superheated is invisible; however, "steam" often refers to wet steam, the visible mist or aerosol of water droplets formed as water vapour condenses. 

12. Answer: (b) the solid form  

Explanation: Water can be found in liquid form in oceans, rivers, lakes and rain; in solid form in ice and snow; and as a gas (water vapour) in the atmosphere.

13. Answer: (b) lithosphere

Explanation:The outermost layer, called the crust, is solid, too. Together, these solid parts are called the lithosphere. Earth's crust is made up of hard rocks.

14. Answer: (c) Drip irrigation

Explanation: Drip irrigation is the method to use water economically. As in drip irrigation system the water is supplied drop by drop to plants which does not cause the wastage of water and supply as per the needs of the plants.

15. Answer: (b) Aquifer

Explanation: An aquifer is an underground layer of water-bearing permeable rock, rock fractures or unconsolidated materials (gravel, sand or salt). Ground water can be extracted using a water well.

16. Answer: (c) Addition of untreated sewage

Explanation: Essentially, the release of poorly treated or even completely untreated sewage is responsible for the frothing and foaming of the river water. Surfactants and phosphates that originate from detergents used in households and industrial laundries, when released in the river untreated, create the foam.

17. Answer: (a) bawaris

Explanation: Bawri were deep step wells built into the ground. It was the traditional way of rainwater harvesting.

18. Answer: (d) Water vapour

Explanation: Transpiration is the process by which moisture is carried through plants from roots to small pores on the underside of leaves, where it changes to vapor and is released to the atmosphere. Transpiration is essentially evaporation of water from plant leaves.

19. Answer: (a) rain

Explanation: The main source of water is the rainwater. The water cycle is a process that involves evaporation, condensation and precipitation and the output is rainwater. The water source is important in the water cycle.

20. Answer: (a) groundwater

Explanation: Groundwater, water that occurs below the surface of Earth, where it occupies all or part of the void spaces in soils or geologic strata. It is also called subsurface water to distinguish it from surface water, which is found in large bodies like the oceans or lakes or which flows overland in streams.

21. Answer: (d) Water

Explanation: The Earth has been blue for over 4 billion years because of the liquid water on its surface. There is only one known planet with permanent bodies of liquid water at its surface: ours. Earth sciences allow us to explain why the Earth has almost always been blue: it's neither too warm nor too cold.

22. Answer: (a) Infiltration

Explanation: Process of seeping of water into the ground is called infiltration . Infiltration is the process by which bulk of rainwater and melted snow soaks into subsurface soils and moves into rocks through cracks and pores,

23. Answer: (a) Kill germs

Explanation: Water chlorination is the process of adding chlorine or chlorine compounds such as sodium hypochlorite to water. This method is used to kill bacteria, viruses and other microbes in water. In particular, chlorination is used to prevent the spread of waterborne diseases such as cholera, dysentery, and typhoid.

24. Answer: (d) Water pollution

Explanation: The addition of any substance to water, which leads to change in its physical and chemical characteristic, is defined as water pollution.

25. Answer: (b) Condensation

Explanation: The process of changing water vapour into water is called condensation.This is due to the change of gaseous state of water into liquid state. Some common examples of condensation are Formation of drops of water on the outside of a glass of ice water. ,Formation of dew on grass overnight.

Click here for Practice MCQ Questions for Water: A Precious Resource Class 7

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