NCERT exemplar Class 10 Science solutions chapter 16 helps understand the natural resources. The chapter describes how natural resources such as air, water, coal et cetera are getting affected and how they should be managed to avoid depletion. The NCERT exemplar Class 10 Science chapter 16 solutions provide exact and suitable answers to the student’s queries while studying the problems of NCERT Class 10 Science.
These Class 10 Science NCERT exemplar chapter 16 solutions are complete in nature to make the students understand the concepts. NCERT exemplar Class 10 Science solutions chapter 16 are in accord with the CBSE Syllabus for Class 10.
NCERT Exemplar Class 10 Science Solutions Chapter 16-MCQ
Question:1
From the list given below pick the item that is not a natural resource
(a) Soil
(b) Water
(c) Electricity
(d) Air
Answer:(c)
Natural resources occur naturally within an environment that exists relatively undisturbed by a human, in a natural form. Electricity is not a natural resource as it is developed by humans.
Question:2
The most rapidly dwindling natural resource in the world is
(a) water
(b) forests
(c) wind
(d) sunlight
Answer:(b)
Forests are the most quickly diminishing natural resource on the planet. They are crushed aimlessly as they give crude material to different businesses, for example, wood industry, paper industry, sports industry, and so on
Question:3
The most appropriate definition of a natural resource is that it is a substance/commodity that is:
(a) present only on land
(b) a gift of nature which is very useful to mankind
(c) a man-made substance placed in nature
(d) available only in the forest
Answer:(b)
Natural resources occur naturally within an environment that exists relatively undisturbed by a human, in a natural form. A ‘natural resource’ is a substance/commodity of nature which is very useful to mankind. These are air, water, soil etc.
(a) These can be present anywhere, not necessarily only on land.
(b) These are a gift of nature which are very useful to mankind.
(c) These are not man-made substances.
(d) These can be present anywhere, not necessarily available only in the forest
Hence option (b) is correct.
Question:4
The main cause for abundant coliform bacteria in the river Ganga is
(a) disposal of unburnt corpses into water
(b) discharge of effluents from electroplating industries
(c) washing of clothes
(d) immersion of ashes
Answer:(a)
The fundamental cause for abundant coliform bacteria in the river Ganga is disposal of unburnt corpses into water. Coliform are the gathering of microbes discovered in human digestive organs whose presence in water demonstrates contamination by disease-causing microorganisms.
Hence option (a) is correct.
Question:7
The three R’s that will help us to conserve natural resources for long term use are
(a) recycle, regenerate, reuse
(b) reduce, regenerate, reuse
(c) reduce, reuse, redistribute
(d) reduce, recycle, reuse
Answer:(d)
The three R's that help us to conserve natural resources for long term use are reduced, recycle, reuse.
Reduce: This means less use of natural resources, e.g., save water by repairing leaky taps.
Recycle: This means a collection of materials like plastic, paper, glass etc., to make required things instead of synthesizing or extracting fresh plastic, paper, glass etc.
Reuse: Instead of throwing articles, (e.g., used envelopes) use them again. This is better than recycling because the recycling process uses some energy.
Hence option (d) is correct.
Question:10
In our country, vast tracts of forests are cleared and a single species of plant is cultivated. This practice promotes
(a) biodiversity in the area
(b) monoculture in the area
(c) growth of natural forest
(d) preserves the natural ecosystem in the area
Answer:(b)
The practice of clearing vast tracts of forests and cultivating a single species of plant is known as monoculture. This devastates the biodiversity in the region as the number of species lower. It likewise upsets or disturbs the natural ecosystem in the area. Hence, it decelerates the growth of the natural forest.
Hence option (b) is correct.
Question:11
A successful forest conservation strategy should involve
(a) protection of animals at the highest trophic level
(b) protection of only consumers
(c) protection of only herbivores
(d) comprehensive programme to protect all the physical and biological components
Answer:(d)
Forest conservation strategy should involve exhaustive projects to ensure all the physical and biological components, (i.e., the ecosystem). In the event that living beings just at a specific trophic level are protected, the ecosystem would be disturbed, as the organisms at the lower trophic level would disappear quickly.
This will prompt circumstance where the organisms at all the upper trophic levels would die due to starvation.
Hence option (d) is correct.
Question:12
The important message conveyed by the ‘Chipko Movement’ is
(a) to involve the community in forest conservation efforts
(b) to ignore the community in forest conservation efforts
(c) to cut down forest trees for developmental activities
(d) government agencies have the unquestionable right to order destruction of trees in forests
Answer:(a)
The Chipko movement was a non-violent agitation in 1973 that was aimed at the protection and conservation of trees. The important message conveyed by the ‘Chipko Movement' was to involve the community in forest conservation efforts.
People’s participation can help in increasing forest as well as help in their conservation.
Hence option (a) is correct.
Question:14
Expand the abbreviation GAP
(a) Governmental Agency for Pollution Control
(b) Gross Assimilation by Photosynthesis
(c) Ganga Action Plan
(d) Governmental Agency for Animal Protection
Answer:(c)
GAP stands for the Ganga Action Plan.
The Ganga action plan was, launched by Shri Rajeev Gandhi, on 14 Jan 1986.
The main objectives were:
1. Pollution abatement
2. Improve the water quality by Interception, Diversion and treatment of domestic sewage
3. Prevent toxic and industrial chemical wastes from polluting and entering in to the river.
Question:15
Select the incorrect statement
(a) Economic development is linked to environmental conservation
(b) Sustainable development encourages development for current generation and conservation of resources for future generations
(c) Sustainable development does not consider the view points of stakeholders
(d) Sustainable development is a long planned and persistent development
Answer:(c)
Sustainable development thinks about the perspectives of partners or the stakeholders.
It is a cycle wherein decentralized economic growth and ecological protection go inseparably. It empowers advancement for current generation and the preservation of resources for future generation as well.
It is a long-planned and persistent development. Today, financial development is connected to environmental protection. The climate isn't degraded or put to hazard for the sake of a monetary turn of events.
Hence statement (c) is incorrect and thus the correct answer.
Question:16
Which of the following is not a natural resource?
(a) Mango tree
(b) Snake
(c) Wind
(d) Wooden house
Answer:(d)
Natural resources occur naturally within an environment that exists relatively undisturbed by a human, in a natural form.
The wooden house is not a natural resource. It is man-made.
A mango tree, snake and wind are natural resources. They are present in the environment naturally.
Hence option (b) is correct.
Question:17
Select the wrong statement
(a) Forests provide variety of products
(b) Forests have greater plant diversity
(c) Forests do not conserve soil
(d) Forests conserve water
Answer:(c)
Forests are major sites for conservation of soil. The roots of trees firmly hold the soil particles to protect it from flowing away. The humus is more in the soil of forests.
Forest provides variety of products, e.g., timber, paper etc. They have a greater plant diversity as different type of plants are naturally present. Forest also helps in conservation of water.
Hence option (c) is correct.
Question:18
Arabari forests of Bengal is dominated by
(a) Teak
(b) Sal
(c) Bamboo
(d) Mangroove
Answer:(b)
Arabari forests of Bengal is dominated by sal trees.
With the dynamic and willing support of the local community, these forests went through an astounding recovery by 1983.
Hence option (b) is correct.
Question:19
Ground water will not be depleted due to
(a) afforestation
(b) thermal power plants
(c) loss of forest, and decreased rainfall
(d) cropping of high water demanding crops
Answer:(a)
Afforestation means plantation of trees. Groundwater will not be depleted due to afforestation.
Thermal power plants pollute the groundwater.
Loss of forest and decreased rainfall also pollutes the groundwater.
Most of the groundwater is polluted due to the use of excess water for cropping of high water demanding crops.
Hence option (a) is correct.
Question:20
Opposition to the construction of large dams is due to
(a) social reasons
(b) economic reasons
(c) enviromental reasons
(d) all the above
Answer:(d)
Opposition to the construction of large dams by local people is due to social, economic and environmental problems.
The consequences of raising the height of dams are as follows:
Environmental: Terrestrial flora and fauna of area is destroyed completely. It leads to deforestation and loss of biological diversity.
Social: It leads to dislocation of people and domestic animals living in an area which causes various social problems. Significant farming area might be forever lost.
Economic: The people are not even given adequate compensation for their losses. This obviously leads to economic problems such as temporary unemployment for people.
Hence option (d) is correct.
Question:21
Khadins, Bundhis, Ahars and Kattas are ancient structures that are examples for
(a) grain storage
(b) wood storage
(c) water harvesting
(d) soil conservation
Answer:(c)
Khadin is an ingenious construction designed to harvest surface runoff water for agriculture. These are mostly found in Rajasthan.
Bundhis are used for water harvesting in Madhya Pradesh and Uttar Pradesh.
Ahars are reservoirs with an embankment on three sides mostly found in Bihar.
Kattas are temporary check dams built across streams and rivulets found in Karnataka.
All these are still in use today for the conservation of water.
Hence option (c) is correct.
Question:22
Pick the right combination of terms which has no fossil fuel.
(a) Wind, ocean and coal
(b) Kerosene, wind and tide
(c) Wind, wood, sun
(d) Petroleum, wood, sun
Answer:(c)
Fossil fuel is a general term for buried combustible geologic deposits of natural materials, formed from decayed plants and animals that have been converted to crude oil, coal, natural gas, or heavy oils by exposure to heat and pressure in the earth's crust over hundreds of millions of years.
Wind, wood, sun has no fossil fuel.
Coal, petroleum and kerosene are fossil fuels in the given list
Hence option (c) is correct.
Question:23
Select the eco-friendly activity among the following
(a) Using car for transportation
(b) Using polybags for shopping
(c) Using dyes for colouring clothes
(d) Using windmills to generate power for irrigation
Answer:(d)
Eco-friendly means earth-friendly or not harmful to the environment.
The car uses petrol or diesel that is non-renewable. So it is not eco friendly
Polybags are non-biodegradable. It is also not eco friendly
Dyes are synthetic chemical compounds so not eco friendly
The wind is a renewable source of energy. So, using windmills to generate power for irrigation is an eco-friendly activity.
Hence option (d) is correct.
NCERT Exemplar Class 10 Science Solutions Chapter 16-Short Answer
Question:25
Prepare a list of five items that you use daily in the school. Identify from the list such items that can be recycled.
Answer:
Many items that are we use daily in school are pen, paper, plastic box, steel spoon/fork, scale, eraser, sharpener, compass, divider (metallic) etc.
Among these, the items that can be recycled are paper, plastic box, metallic compass, steel lunch box and steel spoon.
Question:26
List two advantages associated with water harvesting at the community level.
Answer:
Water harvesting is a strategy for holding water on the outside of the earth, to make it permeate under the ground in order to recharge groundwater.
Two advantages associated with water harvesting at the community level are:
(i) Giving people control or command over their local water resources guarantees that mismanagement is decreased to a minimum level.
(ii) The water stored in the ground does not evaporate, gives moisture for vegetation over a wide territory, and is protected from pollution by human and animal waste. Hence over-exploitation of these resources is reduced.
Question:28
What measures would you take to conserve electricity in your house?
Answer:
A few measures can be taken to conserve electricity in our house are as follows:
(i) Turn off unnecessary lights
(ii) Turn off the fans in unoccupied rooms and also when they are not required.
(iii) Try to use natural light as much as possible. Maximize the use of solar radiation.
(iv) Unplug unused electronics.
(v) During winters, use solar water heating system instead of electric heaters.
(vi) Fluorescent tubes or CFL should be used instead of electric bulbs as they consume less electricity.
Question:29
Although coal and petroleum are produced by degradation of bio- mass, yet we need to conserve them. Why?
Answer:
Coal and petroleum were formed from the degradation of biomass. This biomass included ancient plant life which lived millions of years ago.
These resources are being utilized at a much faster rate than their formation. So they will be exhausted in the near future. And then we would need to look for alternative sources of energy.
This is the reason why we need to conserve them, although these resources are produced by the degradation of bio-mass.
Question:30
Suggest a few measures for controlling carbon dioxide levels in the atmosphere.
Answer:
(i) Photosynthesis: It removes carbon dioxide naturally. Growing, reestablishing and managing forests to energize more carbon take-up can use the power of photosynthesis, changing a noticeable amount of carbon dioxide all around into carbon put away in wood and soils.
(ii) Reducing the consumption of petroleum in automobiles: This can be done using car-pools, public transport, electric bikes and other electric transport.
(iii) Use of alternative fuels such as CNG (clean fuel) instead of coal and petroleum
(iv) Prepare manure out of litter instead of burning it.
(v) The smoke emerging from the thermal power stations and different industries ought to be very much treated to eliminate harmful gases, prior to releasing it into the atmosphere.
Question:31
(a) Locate and name the water reservoirs in Figures 16.1 (a) and (b).
(b) Which has an advantage over the other and why?
Answer:
(a) The water reservoir is a pond in fig. (a) and underground water body in fig. (b) i.e., the underground water body has more advantage over a water reservoir.
(b) There are many advantages of water stored in the ground. Some of these are as follows:
(i) It does not evaporate.
(ii) It spreads out to recharge wells and provides moisture for crops over a wide area.
(iii) Stagnant water collected in ponds promotes the breeding of mosquitoes. Whereas water stored in the ground does not.
(iv) Water stored in the ground is free from contamination by human and animal wastes.
(v) It is utilized for the benefits of the local population
NCERT Exemplar Class 10 Science Solutions Chapter 16-Long Answer
Question:32
In the context of conservation of natural resources, explain the terms reduce, recycle and reuse. From among the materials that we use in daily life, identify two materials for each category.
Answer:
In the context of natural resources, the following terms refer to
Reduce: This means to use a material/commodity in a lesser quantity.
Recycle: This means a material that is used once, is collected and sent back to a manufacturer so that they can make some other useful materials from it.
Reuse: It means using a thing over and over again instead of throwing it away. This is actually even better than recycling because the process of recycling uses some energy.
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From among the materials we use in daily life, we can:
Reduce electricity use and reduce petroleum usage.
Recycle used paper, plastic bottles, metal objects.
Reuse the plastic bottles, polythene bags etc.
Question:33
Prepare a list of five activities that you perform daily in which natural resources can be conserved or energy utilisation can be minimised.
Answer:
Activities that we perform daily in which natural resources can be conserved or energy utilization can be minimized are as follows:
(i) Use fan and light only when required. Switch them off in unoccupied rooms.
(ii) Use CFL in place of conventional bulbs/tubes.
(iii) Avoid using a hose pipe for watering plants as a lot of water is wasted through it.
(iv) Turn off tap water when not in use.
(v) Use solar energy/natural light whenever possible.
(vi) Unused water in the water bottles may be used for watering plants.
(vii) Use public transport or car pools to save fuel.
(vii) Use CNG as an alternative fuel.
(ix) Pressure cookers should be used for cooking food to save fuels.
(x) Use stairs to climb instead of taking lift.
Question:34
Is water conservation necessary? Give reasons.
Answer:
Conservation of water is necessary due to following reasons:
(i) Uneven distribution: Some parts of our country have high resources of water whereas other parts suffer from chronic water shortage. This causes floods in some regions and drought in other regions.
(ii) Fluctuation in rainfalls is very common and wide seasonal rains are observed yearly.
(iii) Dumping of untreated sewage and industrial wastes in rivers and ponds make them polluted.
(iv) The changing lifestyle of people increases the consumption of water, especially in urban areas.
(v) High yielding varieties of crop uses much more water for irrigation.
Question:35
Suggest a few useful ways of utilising waste water.
Answer:
Some useful ways of utilizing wastewater are as follows
(i) Recharging the groundwater.
(ii) Can be used for agricultural purposes such as irrigation.
(iii) Treated water can be used for washing cars, watering gardens etc.
(iv) Recycling aquarium water
(v) Collect rainwater.
(vi) Wastewater from the kitchen can be collected and reused in toilet cleaning.
(vii) Certain pollutants in municipal water can act as fertilizer for various crops.
Question:36
What is the importance of forest as a resource?
Answer:
Forest are renewable natural resources. They are important as a resource due to the following reasons:
(i) They provide habitat, food and protection to wildlife.
(ii) Help in balancing CO2 and O2 of the atmosphere.
(iii) Improves water holding capacity of the soil.
(iv) Regulates the water cycle.
(v) For human beings, they are the source of various essential commodities like fuel, wood, timber, fruits, resins, etc
(vi) Forest helps in the conservation of biodiversity as a large number of species (of plants and animals) live inside them.
Question:37
Why are the Arabari forests of Bengal known to be a good example of conserved forest?
Answer:
Arabari Forest Range, is the name of a forest range in West Bengal. The Arabari forest of Bengal was badly degraded. Conservation efforts were begun in 1972.
The West Bengal Forest Department (headed by Indian Forest Service officer Shri Ajit Kumar Banerjee) planned to revive the degraded forest by involving the local people.
The residents of the surrounding area were associated with the protection of 1272 hectares of this forest. With the dynamic participation of neighbourhood individuals living around the forest, the degraded sal forest of Arabari turned out to be thick and green inside ten years.
Consequently, the residents were given work in both silviculture and harvesting operations of the forest and were permitted to gather firewood and fodder from the forest area on a very nominal payment. Thus, the Arabari forest provides a genuine example of the conserved forest.
NCERT Exemplar Class 10 Science Solutions Chapter 16 Management of Natural Resources Important Topics:
- In this chapter, we understand how to save these natural sources from any kind of pollution.
- NCERT exemplar Class 10 Science solutions chapter 16 discusses natural resources which are being exhausted rapidly and understands the importance to save them.
- In this chapter, students will learn the pH measurement of water to decide the usability of water.
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Features of NCERT Exemplar Class 10 Science Solutions Chapter 16 Management of Natural Resources:
These Class 10 Science NCERT exemplar chapter 16 solutions provide an understanding of the management of natural resources. Energy is very important for life to exist, sources of energy are called resources, they may be natural as well as artificial. Along with energy sources, other important substances are found in nature and they all are cumulatively called natural resources. Soil, water, air, and many other substances around us are called natural resources. It is highly recommended to use these solutions for understanding and scoring high in Management of Natural Resources based problems. The NCERT exemplar Class 10 Science chapter 16 solutions Management of Natural Resources due to their comprehensive nature nurtures the students in a way that he/she can attempt other books such as CBSE previous year question papers, NCERT Class 10 Science Book, et cetera.
An exclusive feature of NCERT exemplar Class 10 Science solutions chapter 16 pdf download can help the students to browse through these solutions even in the offline environment and get answers to their queries while studying NCERT exemplar Class 10 Science chapter 16.
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