Class 10 Science Chapter 16 Board Questions

Class 10 Science Chapter 16 Board Questions of Management of Natural Resources. CBSE Board Exams questions contains 1 mark, 2 marks, 3 marks and 5 marks previous year’s questions with solution and answers. The sets of board exam questions contain all the important questions from last 10 year’s papers and all the questions from previous 5 years CBSE Board exam’s questions with answers and explanation. These questions are important not only for terminal exams but final board exams also. Practice the entire chapter 16 using these questions and get good marks in school examinations. These questions just provide a brief idea about the questions asked in CBSE Board exams and helps in the preparation of all exams whether class test or terminal exams.

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Class 10 Science Chapter 16 Board Questions for Exams

Class: 10Science
Chapter: 16Board Questions with Answers

Class 10 Science Chapter 16 Board Questions Answers

Class 10 Science Chapter 16 Board Questions with suitable answers are given below. Questions are divided into sets of 1 mark, 2 marks, 3 marks and 5 marks questions with answers. To score good marks and clear your doubts, must go through these questions. These Questions provides a complete revision of Chapter 16 of Class 10 Science NCERT Textbook.

10th Science Chapter 16 Board Questions Set – 1 (1 Mark)

How does mining cause pollution? [CBSE 2013]

Mining causes pollution because large quantities of slag are produced and discarded in the extraction of metals.

Why management of natural resources should ensure equitable distribution of resources? [CBSE 2013]

Management of natural resources should ensure equitable distribution of resources so that the benefit should go to all and not just privileged persons.

List any two measures that you suggest for better management of water resources. [CBSE 2013]

(i) Install water harvesting systems.
(ii) Give the control of water management to the residence of the colony.

“Sun is the ultimate source of energy for fossil fuels”, justify this statement. [CBSE 2011]

Plants obtain energy form the sun for preparing their food. Animals get energy by eating plants. Fossil fuels are obtained when animals and plants get buried. Thus, sun is the ultimate source of energy for fossil fuels.

Define the term “conservation of environment”. [CBSE 2006]

Sensible use of natural resources in order to avoid excessive degradation and to keep the environment safe as it is, is called conservation of environment.

10th Science Chapter 16 Board Questions Set – 2 (1 Mark)

Why is it necessary to conserve our environment? [CBSE 2005]

It is necessary to conserve our environment to prevent depletion of natural resources and to keep it worth living for future generations.

Explain one main advantage associated with water harvesting at the community level. [CBSE 2017]

Water harvesting at community level involves rain water harvesting. Its advantages are:
(a) It replenishes the groundwater, which does not dry up and thus recharges the tube wells etc.
(b) Since water does not get collected on surface and mosquitoes do not get breeding ground.

Management of forest and wildlife resources is a very challenging task. Why? Give any two reasons. [CBSE 2017]

Management of forest and wildlife resources is a very challenging because:
(i) there are many people who have stake in these resources and may not follow rules.
(ii) these resources cannot be contained in a limited area and hence cannot be guarded easily.

Give an example to show that prejudice against the traditional use of forests has no basis. [CBSE 2013]

Great Himalayan National Park provides an example of this. It has alpine meadows which were grazed by sheep. Nomadic shepherds used to drive their sheep there from the valley every summer. This practice was banned by the government. The result is the grass has grown very tall. It falls over and prevents the growth of fresh grass.

Suggest any two ways to strike a balance between environment and development. [CBSE 2006]

Two ways to strike a balance between environment and development are:
(i) Plant more and more trees.
(ii) Adopt environmentally sound technologies based on maximum recycling and efficient use of resources.

Question: What is sustainable development? Suggest any one method to achieve it. [CBSE 2006, 2015, 2016, 2017, 2018]
Answer: Development which can be maintained for a long time without damage to the environment is called sustainable development.

    • Plant more trees.
    • Recycle resources to the maximum.




10th Science Chapter 16 Board Questions Set – 3 (1 Mark)

What does the high level of total coliform count in river ganga indicates? [CBSE 2011]

It indicates that water is contaminated by diseases causing microorganisms.

What is a coliform? [CBSE 2011]

Coliform is a group of bacteria, which is found in the intestine of human.

State two reasons launching the Ganga Action Plan. Which bacteria was found in Ganga water indicating contamination. [CBSE 2011]

Reasons:
(i) The quality of river ganga is decreased.
(ii) The counting of diseases decreases causing bacteria is increased.
The coliform bacteria were found in Ganga water.

Why is sustainable management of natural resources necessary? [CBSE 2013]

Sustainable management of natural resources means judicious use of natural resources so that they fulfil our need and last for generation to come.

Define water harvesting? [CBSE 2012]

Water harvesting is the activity of direct collection of Rain Water, which can be stored for direct use or can be recharged into the groundwater.

10th Science Chapter 16 Board Questions Set – 4 (2 Marks)

List two traditional systems of harvesting. [CBSE 2012]

Traditional system of water harvesting:
Pons Tanks, khadins, Surangams, etc.

Suggest two methods by which our consumption of coal and petroleum can be reserved? [CBSE 2011]

(i) Use of solar energy, wind energy and other alternative fuels.
(ii) Use of coal and petroleum products judicially.

State one advantages of using disposal paper cups over disposable plastic cups. [CBSE 2011]

Disposals paper cups produce less pollution because they are biodegradable while plastic cups are non-biodegradable.

What harms has been caused to alpine meadows since nomadic shepherds have stopped grazing their cattle in such meadows? [CBSE 2011]

The grasses become very tall which prevents the fresh growth of alpine grassland in Himalayas. This causes the end of Himalaya National Park.

Question: List three resources to justify the need to manage the available resources carefully. [CBSE 2013]
Answer: Three reasons are given as under:

    1. Their use does not damage the environment.
    2. These remain available to future generations.
    3. The benefit of development reaches to everyone.




10th Science Chapter 16 Board Questions Set – 5 (3 Marks)

How are different stakeholders dependent on forests? Mention any four of them. [CBSE 2012]

(i) Wildlife and nature enthusiasts do research and derive pleasure from forests. They want to conserve nature in its original form.
(ii) Industrialists obtain raw materials from the forest for their products.
(iii) People living near the forests are dependent on them for their requirements of wood and folder.
(iv) Forest department of the government who owns the land and control the resources from forests.

List any four suggestions you would recommend to your friends to make them more environmental-friendly. [CBSE 2008, 2016, 2017]

(i) Reduce the use of energy resources. For example, we can save electricity by switching off unnecessary lights and fans.
(ii) Recycle of plastic, paper, glass and metal articles.
(iii) Reuse of things. For example, we can reverse the envelop and use them again. Similarly, we can use empty bottles of pickles, jams and squashes for storing kitchen items.
(iv) On day to day basis we can decide which route to take undertake a project so that the minimum use of energy and resources are involved.

List any four changes you would like to incorporate in your life style in a move towards a sustainable use of available resources in our country. [CBSE 2008]

Four changes that can be incorporated in my life style as a move toward sustainable use of available resources are:
(i) I shall reduce wastage of electricity by switching off unnecessary lights and fans.
(ii) I shall reduce the use of petrol by pooling my car.
(iii) I shall segregate non-biodegradable wastage consisting of plastic, glass and metal from other waste and send it for recycling.
(iv) I shall pass on my books and notes to my junior instead of disposing off.

Why should we conserve forests? Suggest any two ways to conserve forests. [CBSE 2008, 2015, 2017]

Forests are biodiversity hot spots. The aim of conservation of forests is to preserve the biodiversity that we have inherited. Loss of diversity leads to ecological instability.
Ways to conserve forests:
(i) Silviculture- Reforest those forests lands where a large number of trees have been felled in a planned way.
(ii) Help of local people: Local people can help a lot in conserve the forests.

List any four practices which would help in protecting our environment. [CBSE 2005]

Four practices which would help in protecting our environment are:
(i) Judicious use of fertilisers.
(ii) Proper drainage and irrigation.
(iii) Harvesting of rain water.
(iv) Rotation of crops.

10th Science Chapter 16 Board Questions Set – 6 (3 Marks)

Why is conservation of wildlife considered important for us? Give any two reasons. [CBSE 2017]

Conservation of wildlife is important in maintaining ecological balance:
(i) Wildlife keeps control over a number of herbivorous animals.
(ii) It is a storehouse of a number of articles like wood, herbs, lac and honey.

Give two advantages of water stored inn ground? [CBSE 2008]

(i) It does not evaporate but spreads out to recharge wells and provide moisture for vegetation over a wide area.
(ii) It remains protected from contamination by human and animals waste.

Student were asked to conduct a survey and prepare a report on the number of tigers in Rajasthan. They were surprised to see that very less number of tigers are there. (i) What cause this sharp decreases in number of tigers? (ii) How is the small number of surviving tigers cause of worry from the genetics point of view? (iii) As a student what measures can you take to create awareness among people? [CBSE 2013]

(i) Poaching of animals and deforestation are the major reasons for the sharp decrease in the number of tigers.

(ii) With the decreases in population of tigers there will be a smaller chance of genetic variation. It will make them unfit to cope with the changing environments. There is a possibility of their extinction after a prolonged period of time.

(iii) I shall give the message to the people that.
(a) Loss of tiger will decrease the biodiversity of forests.
(b) It will create instability in the food chain. In the absence of tigers, the population of herbivores will increase. There will be no plants or grass left and desert condition will develop.

Suggest three ways to maintain a balance between environment and development. [CBSE 2007]

Three ways to maintain a balance between environment and development are:
(i) We should use natural resources cautiously.
(ii) Resources should be used in environmentally and developmentally sound manner.
(iii) If the exploitation of resources is too high, economic and social development will be faster at the cost of environment.

What measures have been taken for the conservation of wildlife? State any three measures. [CBSE 2003]

(i) Total ban on poaching or capturing of nay bird or animals belonging to endangered species has been imposed.
(ii) National parks and sanctuaries have been established.
(iii) Natural habits of our wildlife have been preserved.

Question: [CBSE 2017, 2018]

While teaching the chapter ‘Our environment’ the teacher stressed upon the harmful effects of burning of fossils fuels, plastic, paper, etc. The student noticed the extensive use of plastic and polythene in daily life, which can be avoided and the surrounding can be kept clean. They decided to make their school “plastic and polythene” free and motivated each other for its minimum use.

    1. Why should be the of plastic and polythene be reduced in daily life?
    2. In what ways the students would have avoided the use of plastic and polythene in their school?
    3. How the students would have motivated each other for the success of their decision?



Answer

    1. Polythene and plastic are synthetic material and non-biodegradable. Hence they would cause pollution and damage the environment.
    2. In schools there is extensive use of pens, colour pens etc. Students can be told to either use inks pens or use refills for ball pens.
      Students can carry their food in steel boxes instead of plastic boxes. Even water can be carried in steel flasks.
      Report/projects etc., can be given in newspaper or cardboard folders rather than plastic folders- Repurpose and Refuse.
    3. The students can be motivated in many ways:
      By conducting morning assemblies, street plays, speeches, discussion, display-boards etc. There can be a stock of paper folders for students to carry their stuff in and they can be asked to replace their plastic bags with those.

10th Science Chapter 16 Board Questions Set – 7 (5 Marks)

We are all familiar with the “Chipko Movement” which originated in the early 1970s in a remote village of Garhwal high up in Himalayas. This was a result of dispute between the local villagers and a greedy contractor who has been allowed to feel the trees in a forest close to the village. When contractor workers appeared in forest to cut the trees, the men folk were not present so the women folk took the lead in movement of preventing the contractor from felling the tree. They hugged the trees and forced the contactor to withdraw. (i) Why were the villagers against felling of trees? (ii) How do forests maintain ecological balance in nature? (iii) List two values exhibited by the “Chipko Movement.” [CBSE 2017, 2018]

(i) The villagers were against felling of trees as they are actual stakeholders. They depend on forests for their day-to-day living for e.g. for fruits, leaves, fire wood, medical plants, food for their cattle etc.
(ii) Forests are ‘biodiversity hotspots’. They maintain ecological balance by providing O2 and CO2 for all living beings, by maintaining water cycle and nutrient cycles, by providing specific ecological niche to various animals etc.
(iii) Values exhibited by Chipko Movement are:
(a) Concern for maintaining one’s environment.
(b) Sense of belonging.
(c) Feeling part of unit/team and
(d) Being together in all endeavours.
(e) Appreciating and releasing the significance of trees/nature in human life.

(a) What is sustainable development? Why is it necessary? (b) What is water harvesting? List its fourth benefits. [CBSE 2016, 2017]

(a) Sustainable development: Sustainable living has always been as integral part of Indian’s tradition and culture. “Vasudhaiv Kutumbakam”, which means “the entire earth is one family” reflect on philosophy that entire natural world be in harmony. Sustainable development means development in a manner so that our reasons are managed in a way such that they are used by present generation, without causing any damage or harm to them and remain available for future generation as well. It encourages forms of growth that meet current basic human needs while preserving the resources for needs of future generations. It is necessary so that these resources are not damaged or depleted in a way so that future generation will not have the benefit of availability of these resources. These resources are not unlimited and human population and hence demands on these resources is increasing of a very fast rate.
It would also ensure equitable distribution of resources to all and safe disposal of the wastes too.
(b) Water harvesting involves ways to save water to capture every trickle of water by making dams or indigenous methods like digging small pits, lakes, construction of dykes, sand and limestone reservoir, roof-top water collection units.
Its benefits are:
(i) It increase biomass and production.
(ii) Mitigates droughts and floods.
(iii) Recharges groundwater levels.
(iv) Brings rivers back to life.
(v) Increases the income of watershed community i.e. people living in nearby areas.
(vi) Conserves ecological balance.

(a) In the context of conservation of natural resources, explain the term refuse, reduce, recycle, repurpose and reuse. (b) Why is conservation of water necessary? State any four reasons. [CBSE 2016, 2017]

(a) We need to conserve natural resources, not only for future generations, but economic development is also linked with it. Hence one should practice 5R’s to conserve environment: Refuse, Reduce, Reuse, Repurpose and Recycle.
(i) Refuse: To say no to things one doesn’t need.
(ii) Reduce: It means that one uses less of resources. For e.g. less use of water, electricity, petrol etc.
(iii) Recycle: It means that one recycles paper, plastic, metal, glass etc. to make fresh items instead of synthesizing fresh plastic, paper etc. The wastes need to be segregated and some energy used to remold these items.
(iv) Repurpose: When a product cannot be used for its original purpose, then it should be put to use for some other purpose. For example, old crockery can be used for growing plants.
(v) Reuse: It is better than recycling because the same thing is used again and again. Fr e.g. jars of pickle and jams can be used for storing other things.
(b) Water is a basic necessity for e.g. terrestrial life forms. Water is a very important resources and in fact all human civilizations started at the source of water.
Regions of water scarcity are usually associated with acute poverty. Hence, we must conserve water because:
(i) It is important for all metabolic functions in an organism.
(ii) It is required for both agriculture as well as our daily needs.
(iii) We get rainfall only during a few months of the year, hence sufficient water is not available throughout the year.
(iv) Our activities like pollution from industrial effluents and urban wastes also impact the water bodies adversely.
Hence, we must conserve water.

Question:

What is “Sustainable Management of Natural Resources” Why is it necessary? Which one out of reuse and recycle, would you practice in your daily life and why? [CBSE 2017, 2018]

Answer:

“Sustainable Management of Natural Resources” means managing natural resources like air, water, soil, forests etc., to meet current human needs while preserving them for the needs of future generation and maintaining the quality of our environment. Sustainable management is essential to maintain the quality of environment and also to ensure their availability continuously, even for future generation.
Out of reuses and recycle, reuse is better practice as it can be done again and again without involving any inputs whereas recycle requires some energy, and thus preferable.



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