{"id":24512,"date":"2021-06-18T13:03:50","date_gmt":"2021-06-18T07:33:50","guid":{"rendered":"https:\/\/ncertsolutions.guru\/?p=24512"},"modified":"2021-08-07T17:26:17","modified_gmt":"2021-08-07T11:56:17","slug":"ncert-solutions-for-class-7-science-chapter-16","status":"publish","type":"post","link":"https:\/\/ncertsolutions.guru\/ncert-solutions-for-class-7-science-chapter-16\/","title":{"rendered":"NCERT Solutions for Class 7 Science Chapter 16 Water: A Precious Resource"},"content":{"rendered":"

These NCERT Solutions for Class 7 Science<\/a> Chapter 16 Water: A Precious Resource Questions and Answers are prepared by our highly skilled subject experts to help students while preparing for their exams.<\/p>\n

Water: A Precious Resource NCERT Solutions for Class 7 Science Chapter 16<\/h2>\n

Class 7 Science Chapter 16 Water: A Precious Resource Textbook Exercise Questions and Answers<\/h3>\n

Question 1.
\nMark \u2018T\u2019 if the statement is true and \u2018F\u2019 if it is false:
\na. The freshwater stored in the ground is much more than that present in the rivers and lakes of the world.
\nb. Water shortage is a problem faced only by people living in rural areas.
\nc. Water from rivers is the only source for irrigation in the fields.
\nd. Rain is the ultimate source of water.
\nAnswer:
\na. T
\nb. F
\nc. F
\nd. T<\/p>\n

Question 2.
\nExplain how groundwater is recharged?
\nAnswer:
\nThe rainwater and water from other sources, such as rivers and ponds, seeps through the soil and fills the empty spaces and cracks deep below the ground. The process of seeping of water into the ground is called infiltration. The groundwater thus gets recharged by this process.<\/p>\n

Question 3.
\nThere are ten tube wells in a lane of fifty houses. What could be the long term impact on the water table?
\nAnswer:
\nTen tube-wells in a lane of fifty houses can lead people to mindlessly exploit the groundwater. This can lead to depletion of the water table in the long run.<\/p>\n

Question 4.
\nYou have been asked to maintain a garden. How will you minimise the use of water?
\nAnswer:
\nDrip irrigation can be implemented to reduce the wastage of water. By this process, water is delivered to the base of the plants directly. Pipes should be checked for leaks. Arrangements should be made for collecting rainwater in small pits. This water can be used later for various purposes.<\/p>\n

\"NCERT<\/p>\n

Question 5.
\nExplain the factors responsible for the depletion of water table.
\nAnswer:
\nHere are a few factors which are responsible for the depletion of water table:
\na. Increased population: As our population increases, correspondingly the demand for water also increases.<\/p>\n

b. Increasing industries: The number of industries is on the rise ever since the human population began multiplying exponentially. These industries need water for various processes.<\/p>\n

c. Lack of water conservation techniques: Rain is the main source of water for both the surface and the underground water bodies. Upon proper conservation, the ground water can be increased. This has not yet been achieved due to lack of implementation of such water conservative techniques.<\/p>\n

d. Agricultural activities: Our country depends vastly on its agricultural roots and the land that is used for the cultivation has increased. Hence, water consumption has also increased. Groundwater is exploited as there is an irregularity in the rainfall. This results in the depletion of groundwater.<\/p>\n

Question 6.
\nFill in the blanks with the appropriate answers:
\na. People obtain groundwater through ……………….. and ………………..
\nb. Three forms of water are ……………….., ……………….. and ………………..
\nc. The water bearing layer of the earth is ………………..
\nd. The process of water seepage into the ground is called ………………..
\nAnswer:
\na. wells and tube-wells, b. solid, liquid and gas, c. aquifer, d. infiltration<\/p>\n

Question 7.
\nWhich one of the following is not responsible for water shortage?
\na. Rapid growth of industries
\nb. Increasing population
\nc. Heavy rainfall
\nd. Mismanagement of water resources
\nAnswer:
\nc. Heavy rainfall<\/p>\n

Question 8.
\nChoose the correct option. The total water
\na. in the lakes and rivers of the world remains constant.
\nb. under the ground remains constant.
\nc. in the seas and oceans of the world remains constant.
\nd. of the world remains constant,
\nAnswer:
\nd. of the world remains constant.<\/p>\n

Question 9.
\nMake a sketch showing ground-water and water table. Label it.
\nAnswer:
\n\"NCERT<\/p>\n

NCERT Extended Learning Activities and Projects<\/span><\/p>\n

Question 1.
\nRole play: You are a water detective in your school. You have a team of six members. Survey the campus and make a note of the following.
\na. Total number of taps
\nb. Number of taps leaking
\nc. Amount of water wasted due to leaking
\nd. Reasons of leakage
\ne. Corrective measures taken
\nHint:
\nDo it yourself.<\/p>\n

\"NCERT<\/p>\n

Question 2.
\nGroundwater pumped out: Try to find out if there are any hand pumps in your neighbourhood. Go to the owner or the users of a few of these and find out the depth at which they struck water. If there are any differences, think of the probable reason. Write a brief report and discuss it in your class. If possible, visit a place where boring is going on to install a hand pump. Watch the process carefully and find out the depth of the water table at that place.
\nHint:
\nThere is a difference in depth of water table in difference places. According to the depth of the water table, the pumps are bored to different, depths at different places.<\/p>\n

Question 3.
\nCatching rainwater-Traditional methods: Form groups of 4 to 5 students in the class and prepare a report on the various traditional ways of water harvesting. If possible, use the following web link: www.rainwaterharvesting.org.
\nHint:
\nDo it yourself.<\/p>\n

Question 4.
\nConservation of water: Carry out a campaign to conserve water at home and in the school. Design posters to remind others of the importance of water resources.
\nHint:
\nDo it yourself.<\/p>\n

Question 5.
\nCreate a Logo: Hold a competition to create a logo or a symbol depicting water scarcity.
\nHint:
\nDo it yourself.<\/p>\n

Activity 1<\/span><\/p>\n

Objective: To collect information (articles and pictures) on water shortage from the newspapers and magazines.
\nMaterials Required: Old newspapers and magazines, scrap book.
\nProcedure:<\/p>\n