Chapter 16 – Management Of Natural Resources

Class 10 Science · 37 questions · 36 with answers

Questions

Q1Multiple choice

From the list given below pick the item that is not a natural resource

(a)Soil
(b)Water
(c)Electricity
(d)Air

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Q2Multiple choice

The most rapidly dwindling natural resource in the world is

(a)water
(b)forests
(c)wind
(d)sunlight

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(b) forests

Q3Multiple choice

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

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(b) a gift of nature which is very useful to mankind

Q4Multiple choice

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

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(a) disposal of unburnt corpses into water

Q5Multiple choice

The pH of water sample collected from a river was found to be acidic in the range of 3.5 – 4.5, on the banks of the river were several factories that were discharging effluents into the river. The effluents of which one of the following factories is the most likely cause for lowering the pH of river water?

(a)Soap and detergent factory
(b)Lead battery manufacturing factory
(c)Plastic cup manufacturing factory
(d)Alcohol distillery

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(b) Lead battery manufacturing factory

Q6Multiple choice

The pH range most conducive for life of fresh water plants and animals is

(a)6.5 – 7.5
(b)2.0 – 3.5
(c)3.5 – 5.0
(d)9.0 – 10.5

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(a) 6.5 – 7.5

Q7Multiple choice

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

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(d) reduce, recycle, reuse

Q8Multiple choice

Given below are a few statements related to biodiversity. Pick those that correctly describe the concept of biodiversity (i) Biodiversity refers to the different species of flora and fauna present in an area (ii) Biodiversity refers to only the flora of a given area (iii) Biodiversity is greater in a forest (iv) Biodiversity refers to the total number of individuals of a particular species living in an area

(a)(i) and (ii)
(b)(ii) and (iv)
(c)(i) and (iii)
(d)(ii) and (iii)

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Q9Multiple choice

Among the statements given below select the ones that correctly describe the concept of sustainable development (i) Planned growth with minimum damage to the environment (ii) Growth irrespective of the extent of damage caused to the environment (iii) Stopping all developmental work to conserve the environment (iv) Growth that is acceptable to all the stakeholders

(a)(i) and (iv)
(b)(ii) and (iii)
(c)(ii) and (iv)
(d)(iii) only

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(a) (i) and (iv)

Q10Multiple choice

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 112 E XEMPLAR P ROBLEMS – SCIENCE

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(b) monoculture in the area

Q11Multiple choice

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

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(d) comprehensive programme to protect all the physical and biological components

Q12Multiple choice

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

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(a) to involve the community in forest conservation efforts

Q13Multiple choice

In our country, there are attempts to increase the height of several existing dams like Tehri and Almati, dams across Narmada. Choose the correct statements among the following that are a consequence of raising the height of dams (i) Terrestrial flora and fauna of the area is destroyed completely (ii) Dislocation of people and domestic animals living in the area (iii) Valuable agricultural land may be permanently lost (iv) It will generate permanent employment for people

(a)(i) and (ii)
(b)(i), (ii) and (iii)
(c)(ii) and (iv)
(d)(i), (iii) and (iv)

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(b) (i), (ii) and (iii)

Q14Multiple choice

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

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Q15Multiple choice

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

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Q16Multiple choice

Which of the following is not a natural resource?

(a)Mango tree
(b)Snake
(c)Wind
(d)Wooden house MANAGEMENT OF NATURAL RESOURCES 113

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(d) Wooden house MANAGEMENT OF NATURAL RESOURCES 113

Q17Multiple choice

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

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Q18Multiple choice

Arabari forests of Bengal is dominated by

(a)Teak
(b)Sal
(c)Bamboo
(d)Mangroove

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(b) Sal

Q19Multiple choice

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

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(a) afforestation

Q20Multiple choice

Opposition to the constrution of large dams is due to

(a)social reasons
(b)economic reasons
(c)enviromental reasons
(d)all the above

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(d) all the above

Q21Multiple choice

Khadins, Bundhis, Ahars and Kattas are ancient structures that are examples for

(a)grain storage
(b)wood storage
(c)water harvesting
(d)soil conservation

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Q22Multiple choice

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

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Q23Multiple choice

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 114 E XEMPLAR P ROBLEMS – SCIENCE

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(d) Using windmills to generate power for irrigation 114 E XEMPLAR P ROBLEMS – SCIENCE

Q24Multiple choice

It is important to make small check dams across the flooded gullies because they (i) hold water for irrigation (ii) hold water and prevent soil erosion (iii) recharge ground water (iv) hold water permanently

(a)(i) and (iv)
(b)(ii) and (iii)
(c)(iii) and (iv)
(d)(ii) and (iv) 5JQTV#PUYGT3WGUVKQPU

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(b) (ii) and (iii)

Q25Short answer

Prepare a list of five items that you use daily in the school. Identify from the list such items that can be recycled.

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Paper, rexin bag, blade, pen, plastic box, scale, eraser, compass and dividers (metallic), steel lunch box, steel spoon. Paper, blade, plastic box, eraser, compass, steel lunch box and steel spoon can be recycled

Q26Short answer

List two advantages associated with water harvesting at the community level.

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Hint— (a) The ground water level increases due to recharging of wells. (b) Ground water keeps the layers of soil above it moist and prevents loss of water by evaporation. (c) The water can be stored during rainy season and can be used when required

Q27Long answer

In a village in Karnataka, people started cultivating crops all around a lake which was always filled with water. They added fertilisers to their field in order to enhance the yield. Soon they discovered that the waterbody was completely covered with green floating plants and fishes started dying in large numbers. Analyse the situation and give reasons for excessive growth of plants and death of fish in the lake.

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Since people used excessive fertilisers in the fields, they were carried down to the lake during rains. As many fertilisers contain phosphates and nitrates, the water body became enriched with these chemicals. These chemicals promote excessive growth of aquatic plants and the surface of water was completely covered with plants. (eutrophication) Depletion of light in the water body and insufficient availability of dissolved oxygen and nutrients resulted in the death of fish.

Q28Short answer

What measures would you take to conserve electricity in your house?

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Hint— (a) Put off the fans and lights when they are not required. (b) Maximum use of solar radiation. (c) Use of solar water heating system. during winters. (d) Use of fluorescent tubes or CFL

Q29Short answer

Although coal and petroleum are produced by degradatioin of bio- mass, yet we need to conserve them. Why?

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Both the energy sources coal and pertoleum take millions of years for their formation. As these resources are being utilised at a much faster rate than their formation, they will be exhausted in the near future, hence they need to be conserved.

Q30Short answer

Suggest a few measures for controlling carbon dioxide levels in the atmosphere.

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Hint— (a) Reduce the consumption of petrol in the automobiles. (b) Use of CNG or clean fuel (c) Instead of burning litter prepare manure out of it. (d) Treatment of smoke to remove harmful gases before discharging into atmospheric (e) Plant more trees

Q31Multiple choice

This question refers to a figure in the original PDF.

(a)Locate and name the water reservoirs in Figures16.1 (a) and
(b). (b) Which has an advantage over the other and why? MANAGEMENT OF NATURAL RESOURCES 115 Fig. 16.1 (b) .QPI#PUYGT3WGUVKQPU

Q32Short answer

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.

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Reduce means to use a material/commodity in lesser quantity, e.g electricity and water Recycle means a material that is used once is collected and sent back to a manufacturer so that they can make some other useful material from it: e.g., plastic cups and buckets, glass tumbler, paper, metal objects Reuse means using a thing over and over again instead of throwing it away. It does not involve the process of recycling either in small or large scale: e.g., used envelopes, plastic carry bags, bottles of jam.

Q33Short answer

Prepare a list of five activities that you perform daily in which natural resources can be conserved or energy utilisation can be minimised.

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Hint— (a) Unused water in the water bottle may be used for watering plant (b) Close all the taps before you go to sleep. (c) Avoid using a hose pipe for watering plants (d) Wash vehicles only when they are dirty (e) Use fan and light only when required (f) Use solar water heating devices (g) Use CFL in place of conventional bulbs/tubes ANSWERS 177

Q34Short answer

Is water conservation necessary? Give reasons.

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Hint— The total amount of fresh water is more than enough to meet the needs of human beings. But due to its uneven distribution, wide seasonal as well as yearly fluctuation in rainfalls and wastage water shortage is a chronic problem in most parts of the world.

Q35Short answer

Suggest a few useful ways of utilising waste water.

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Hint— Waste water can be used for (a) recharging the ground water (b) can be used for irrigation (c) treated municipal water can be used for washing cars, watering the gardens (c) certain pollutants in sewage water can become fertiliser for various crops.

Q36Short answer

What is the importance of forest as a resource?

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Hint— Forests are renewable resources which provide (a) Habitat, food, protection to wild life. (b) Help in balancing CO2 and O2 of atmosphere. (c) Improves water holding capacity of soil. (d) Regulates water cycle. (e) For human being, they are the source for all essential commodities like, fuel wood, timber pulp and paper etc. (f) It provides useful products like fruits, resins, gums, essential oils, bidi wrapper etc.

Q37Short answer

Why are the Arabari forests of Bengal known to be a good example of conserved forest? 116 E XEMPLAR P ROBLEMS – SCIENCE

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Hint— The forest department developed a strategy in which the villagers were involved in the protection of the forest. In return for the labour, the villagers were paid and also had some benefit in harvesting operations. They were allowed to collect wood and fodder on payment of nominal fee. In this way, by the active and willing participation of the local people, the sal forests of Arabari were conserved. 178 E XEMPLAR P ROBLEMS – SCIENCE