Assignment for Class 10 Science Chapter 16 Sustainable Management Of Natural Resources
Class 10 Science students should refer to the following printable assignment in Pdf for Chapter 16 Sustainable Management Of Natural Resources in standard 10. This test paper with questions and answers for Grade 10 Science will be very useful for exams and help you to score good marks
Chapter 16 Sustainable Management Of Natural Resources Class 10 Science Assignment
Objective Questions
Question. ‘Chipko Andolan’ originated in a remote village called Reni in Garhwal in the Himalayas during the
Fill in the blanks
Question. The Chipko Andolan originated from an incident in a remote village called.’……….’ in Garhwal.
Answer: Reni
Question. Kulhs system of irrigation is common in _____________ .
Answer: Himachal Pradesh
Question. The Government of India, has recently instituted an ‘Amrita Devi Bishnoi National Award’ for ……… in the memory of Amrita Devi Bishnoi.
Answer: wildlife conservation
Question. In the Arabari forest range of Midnapore district involvement of villagers helped to recover trees of _____________ .
Answer: Sal
Question. Resources which are inexhausitble are called .......... and the resources which once used are lost forever, are known as .......... .
Answer : renewable resources, non-renewable
Question. The uppermost layer of the land forms .......... .
Answer : soil
Question. .......... gas causes green house effect that mostly increases due to use of fossil fuels.
Answer : carbon-di-oxide
Question. Khadin is an example of traditional.
Answer : Water harvesting
Question. In blood carbon monoxide forms .......... that is unable to transport oxygen.
Answer : Carboxyhaemoglobin
Question. .......... is the best method for conservation of environment.
Answer : Reuse
Question. .......... is a blanket around the earth, that protects it from scorching during the day and freezing during the night.
Answer : atmosphere
Very Short Answers
Question. Why should we preserve bio diversity?
Answer : If the bio- diversity is not preserved, the ecological stability of an area will be lost and ecological crisis will be caused.
Question. What are “bio diversity hot spots”? Why this name has been given?
Answer : Forests are called bio diversity hot spots because of the presence of a large number of species of plants and animals.
True/False
DIRECTION : Read the following statements and write your answer as true of false.
Question. Check dams are build along seasonal flooded gullies for water harvesting.
Answer : True
Question. Forests provide variety of products.
Answer : True
Question. Khadins, Ahars and Kattas are ancient structures that are example of of water harvesting.
Answer : True
Question. Sustainable development means planned growth with minimum damage to the environment.
Answer : True
Question. Forests are reservoirs of wildlife.
Answer : True
Question. Successful forest conservation strategy should involve protection of only consumers.
Answer : False
Question. When a single species of plant is cultivated in an area, it promotes monoculture.
Answer : True
Question. Forest and wildlife are conserved to continue food chain.
Answer : False
Question. Increase in human population puts more pressure on land.
Answer : True
Matching Question
1.
Column I Column II
(A) Kulhs (p) Karnataka
(B) Kattas (q) Maharashtra
(C) Tals (r) Rajasthan
(D) Khadin (s) Himachal Pradesh
Answer : A-s, B-p, C-q, D-r
2.
Column I Column II
(A) Wullvar (p) Orissa
(B) Chilka (q) Rajasthan
(C) Sambhar (r) Jammu andKashmir
(D) Harike (s) Punjab
Answer : A-r, B-p, C-q, D-s
3.
Column I Column II
(A) Desertification (p) Amrita DeviBishnoi
(B) Khejri (q) Incomplete combustion
(C) Khadin (r) Deforestation
(D) Carbon monoxide (s) Water harvesting
Answer : A-r, B-p, C-s, D-q
4.
Column I Column II
(A) Ganga Sagar (p) Forests
(B) Coliform Bacteria (q) Amrita Devi
(C) Plastic (r) Chipko Andolan
(D) Biodiversity hotspots (s) A. K. Banerjee
(E) Protection of Khejri trees (t) Bay of Bengal
(F) Ahars and Pines (u) Ganga water
(G) Protection of sal forest (v) Recycle
(H) Hug the trees movement (vi) Bihar
Answer : A-t, B-u, C-v, D-p, E-q, F-w, G-s, H-r
Short Answers
Question. Which one is better to save an environment “Reuse” or “Recycling”? Give reasons to support your answer.
Answer : “Reuse” of material is better than “Recycling” in saving our environment because:
1. Reuse of material does not use any energy, whereas recycling uses some energy.
2. In reuse things are used again and again instead of throwing away.
Question. State two reasons each of conserving
(a) Forest and
(b) Wild life
Answer : (a) Forest: It needs to be conserved as it is a natural resource, many industries depend on it and will exploit and deplete the forest. It is biodiversity hot-spot.
(b) Wildlife: It maintains the ecological balance. Hence all animals which are hunted for skin, fur, tusk, horns etc. need protection and their habitat also need to be conserved.
Question. Why must we conserve our forests? List any two causes for deforestation taking place.
Answer : We must conserve our forest as they are very useful.
(i) It conserves soil by preventing soil erosion, prevents flood and holds lot of water, maintain ground level of water and brings rainfall.
(ii) It provides lot of raw material for many industries like timber, sal, wood, bidi, tendu leaves, coir etc.
Two causes of deforestation:
(a) Exploitation by industries.
(b) Due to increase in population, lot of forest land is converted to build roads and dams for the infrastructure development. Pressure of human settlement is also a major cause.
Question. An environmentalist on visit to your school suggested the use of three R’s to save the environment. Explain what he meant by three R’s and how you would follow his advice at home. [AI CBSE 2009]
Answer : The 3R’s to save the environment means:
(i) Reduce—It means we should use less resources. The demand of exploiting
resources should be reduced by switching off lights, fans when not required, by not wasting paper, pencil etc.
(ii) Recycle—It means, to make new products from the old, used ones, e.g., recycle used paper, plastic bags, glass material and metals like tins, cans, foils etc.
(iii) Reuse—It is the best option i.e., use the things, materials again and again. e.g., use the envelope which was already used, make use of plastic bottles, jam and pickle containers etc.
Question. How do advantages of exploiting natural resources with short-term aims differ from the advantages of managing our resources with a long-term perspective?
Answer : Exploitation of natural resources with short-term aims means exploiting it for need, money and make them extinct but using the same resources with a long-term perspective means managing the resources wisely, judiciously and using them in such a manner that they are present for future generations to come i.e., sustainable management.
Question. What is water harvesting? Write any two advantages of it.
Answer : Water harvesting means capturing water to recharge water reservoirs.
Benefits of water harvesting:
(i) It provides water for potable use.
(ii) It provides water for irrigation.
(iii) It increases the ground water level.
(iv) It provides water for the growth of vegetation.
Question. What is water harvesting? Mention any two water harvesting structures.
Answer : Water harvesting means capturing rainwater where it falls or capturing the run off in a local area for future use.
Two water harvesting structures are Khadins in Rajasthan and Kulhs in Himachal Pradesh.
Question. What is a dam? Write two main advantages and two ill-effects of constructing a big dam.
Answer : Dams are massive barriers built across rivers and streams to confine and utilise the flow of water for human purposes such as irrigation and generation of electricity.
Two main advantages of constructing a big dam are:
1. Generation of electricity.
2. Irrigation.
Two ill-effects of constructing a big dam are:
1. It displaces large number of people.
2. It causes deforestation and loss of biodiversity.
Question. What is meant by sustainable management? The environmentalists are insisting upon “sustainable natural resource management”. State its four advantages.
Answer : Sustainable management is the management of natural resources which requires a longterm perspective so that they last for generations to come and are not to be exploited by the shortterm gains.
Its four advantages are as follows:
1. Resources last for a longer duration.
2. It provides steady economic growth.
3. It helps in ecological conservation.
4. It reduces pollution.
Question. Give two examples each of the following:
1. Renewable sources of energy
2. Non-renewable sources of energy.
Answer : 1. Geothermal energy, wind energy
2. Coal, petroleum
Question. How did ‘Chipko Andolan’ ultimately benefit the local people? Describe briefly.
Answer : Chipko Movement:
→ During 1970, in Reni village of Garhwal, a contractor was allowed to cut trees in a forest near the village.
→ When the contractor’s workers went to the forest to cut trees, the women of the village hugged the tree trunks to prevent the workers from cutting trees.
→ Chipko means ‘hug’ and the movement began with the villagers hugging trees. It is called the ‘Chipko Andolan’.
The movement benefited the local population as it conserved the forest products. It benefited the environment as it conserved the quality of soil and sources of water thereby, maintained balance in nature.
Question. What changes would you suggest in your home in order to be environment-friendly?
Answer : (i) All the bulbs and tube-lights should be replaced with LED (Light Emitting Diode).
(ii) At home, everyone should use natural ventilation and light on day time.
(iii) We should use cloth bags instead of plastic bags for shopping.
(iv) We should avoid wastage of water.
(v) For cooking food we should use LPG instead of microwave or oven.
Question. Can you suggest some changes in your school which would make it environment-friendly?
Answer : (i) Plant enough trees in the school.
(ii) Leaking taps should be repaired so that water is not wasted.
(iii) Bring food in reusable boxes, not in plastic bags or in aluminium foil.
(iv) Teachers can educate students about environmental conservation.
(v) There should be more windows in school for natural light.
Long Answers
Question. How can you as an individual contribute or make a difference to the management of
(a) forests and wildlife, (b) water resources and (c) coal and petroleum?
Answer : (a) Forests and wildlife:
1. By planting more trees.
2. By making mass awareness about the importance of forests and wildlife towards ecological balance.
3. By preventing the wastage of forest produce.
(b) Water resources:
1. Make judicious use of water.
2. Install a rain-water harvesting system.
3. Get leaking taps repaired immediately.
4. Be conscious about municipal taps, i.e. close them if they are unnecessarily running.
(c) Coal and petroleum:
1. Try to use public transport for travelling, as this would reduce fuel consumption.
2. Use solar cooker and solar heater.
3. Make people aware of the importance of these resources.
Question. List five things you have done over the last one week to-
(a) conserve our natural resources,
(b) increase the pressure on our natural resources.
Answer : (a) To conserve our natural resources:
(i) Travelled by a CNG bus for long distances and walk for short distances.
(ii) Used recycled paper
(iii) Thrown biodegradable and non-biodegradable waste into separate bins
(iv) Planted trees
(v) Harvested rainwater.
(b) To increase the pressure on our natural resources:
(i) Used non-renewable resources of energy
(ii) Wasted water
(iii) Wasted electricity
(iv) Used plastics and polythene bags for carrying goods
(v) Used escalators.
Question. “White tiger has become an endangered species” why?
Answer : White tiger has become an endangered species because of:
a) Loss of habitat due to deforestation.
b) Poaching by man
c) or any other correct reason.
Due to this their number has decreased to such an extent that they are facing a threat to their existence.
Question. “Forests can not be conserved only by legislation; local human intervention is also required.” Justify your answer with two examples.
Answer : The two examples when human intervention saved the forest are:
1. The protection of Khajuri trees- In 1731 Amrita Devi Bishnoi led a group of 363 persons who sacrificed their lives for the protection of Khajuri trees in Khejrati village (Rajasthan).
2. Hug the trees movement(Chipko Andolan)- In a Reni village in Gharwal when the contractor’s workers came into the forest to cut down the trees against the will of local people, the women of the village reached the forest quickly and clasped the trunks with their arms, and the forest trees were thus saved.
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