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Lakhmir Singh solutions Biology for Class 10 (2019 Exam) chapter 6 Management Of Natural Resources


Lakhmir Singh Biology Class 10 (2019 Exam)

Biology for Class 10 (2019 Exam)

Chapter 6 - Management Of Natural Resources

Pages 249 - 261

Name two fossil fuels.

Q 1 | Page 258

Name the major programme started to replenish forests.

Q 2 | Page 258

Apart from the availability of forest products, name two other things which are affected by the destruction of forests.

Q 3 | Page 258

Name the river with which the Tehri Dam is associated.

Q 4.1 | Page 258

Name the river with which the Sardar Sarovar Dam is associated.

Q 4.2 | Page 258

Name the river with which the Bhakra Dam is associated.

Q 4.3 | Page 258

Name two factors which can be used to find whether river water has been contaminated.

Q 5 | Page 258

Name the bacteria whose presence in water indicates the contamination with disease-causing micro-organisms.

Q 6 | Page 258

With which process are the following ancient structures associated?
Kulhs, Eris, Surangams, Kattas, Pynes

Q 7 | Page 258

Which fossil fuel is conserved when we save on electricity?

Q 8.1 | Page 258

Which fossil fuel is conserved when we use bicycle for covering short distances instead of a motorbike?

Q 8.2 | Page 258

What is the main purpose of rainwater harvesting?

Q 9 | Page 258

What is the name of the process in which rainwater falling on the earth is stopped from flowing and made to percolate into the ground?

Q 10 | Page 258

Name the most common practice of recharging ground water.

Q 11 | Page 258

The pH of a river water sample as measured by pH paper is found to be 6. What does it tell us about water?

Q 12 | Page 258

Name the person who is most remembered for the protection of Khejri trees in Rajasthan.

Q 13 | Page 258

State whether the following statement is true or false :
Chipko Andolan was associated with the conservation of wild animals such as tigers and lions.

Q 14 | Page 258

Write the full name of CFL.

Q 15.1 | Page 258

Choose one term from the following which include all others :
coal, natural gas, fossil fuels, petroleum

Q 16 | Page 258

Out of the two-reuse and recycle-which, in your opinion, is better to practise? Give reason.

Q 17 | Page 258

Name a clean gaseous fuel other than LPG and natural gas.

Q 18 | Page 258

Fill in the following blanks with suitable words :
LPG is a ........... fuel but biogas is not a..........fuel.

Q 19.1 | Page 258

Fill in the following blank with suitable word :
Glaciers are a source of .............

Q 19.2 | Page 258

Fill in the following blank with suitable word:

 One of the main aim of management of forests and wildlife is to conserve the ........... which we have inherited.

Q 19.3 | Page 258

Fill in the following blank with suitable word :
Khadin is a traditional ............... harvesting system in Rajasthan.

Q 19.4 | Page 258

Fill in the following blank with suitable word :
When a fuel burns in an insufficient supply of air, then some poisonous gas called ......... is also produced.

Q 19.5 | Page 258

What is meant by "sustainable management"?

Q 20 | Page 259

What is silviculture? What are its advantages?

Q 21 | Page 259

Write a short note on 'Chipko Andolan' (Hug the Trees Movement).

Q 22 | Page 259

Why should we conserve forests and wildlife?

Q 23 | Page 259

Describe briefly the 'khadin' system of rainwater harvesting practised in Rajasthan.

Q 24 | Page 259

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

Q 25 | Page 259

Although coal and petroleum are produced by the degradation of biomass, even then we need to conserve them. Why?

Q 26 | Page 259

Is water conservation necessary? Give reasons.

Q 27 | Page 259

Name the products of combustion of fossil fuels like coal and petroleum products. How do they affect us and our environment?

Q 28 | Page 259

Why should fossil fuels like coal and petroleum be used judiciously?

Q 29 | Page 259

What are the three R's to save the environment? Explain with one example of each.

Q 30 | Page 259

What are the main uses of coal and petroleum products?

Q 31 | Page 259

State any five steps to reduce the consumption of coal and petroleum products.

Q 32 | Page 259

Explain why, despite good rains, we are not able to meet the demand for water of all the people in our country.

Q 33 | Page 259

Give one example to show how the participation of local people can lead to the efficient management of forests.

Q 34 | Page 259

Explain briefly, how rainwater harvesting is done from open spaces around the buildings in city areas.

Q 35 | Page 259

What is a natural resource? Name three important natural resources.

Q 36.1 | Page 259

 Why do we need to manage our natural resources?

Q 36.2 | Page 259

State the advantages of constructing dams across the rivers.

Q 37.1 | Page 259

 Describe some of the problems associated with the construction of dams.

Q 37.2 | Page 259

Name any five sources of water (other than rivers)

Q 38.1 | Page 259

Describe how, the water of river Ganga has been highly polluted.

Q 38.2 | Page 259

Name the major industries which are based on forest produce

Q 39.1 | Page 259

State the main aim of the management of forests and wildlife

Q 39.2 | Page 259

Name the four main stakeholders in the management of forest resources.

Q 39.3 | Page 259

 Name some of the ancient structures used for rainwater harvesting by the rural people.

Q 40.2 | Page 259

What are the various advantages of water stored in ground?

Q 40.3 | Page 259

The Bishnoi community of Rajasthan is associated with the conservation of :
(a) coal and petroleum
(b) forests and wildlife
(c) water resources
(d) abiotic environment

Q 41 | Page 259

The Chipko Andolan is associated with :
(a) Tigers
(b) Turtles
(c) Trees
(d) Tomatoes

Q 42 | Page 259

Amrita devi Bishnoi was associated with :
(a) preventing the custom of child marriage in Rajasthan
(b) campaign to save the girl child
(c) conservation of cultural heritage of Rajasthan
(d) conservation of forests and wildlife

Q 43 | Page 259

One of the following is not a direct stakeholder in the management (or conservation) of forests. This is :
(a) the people who have paper mills.
(b) the people who run the forest department
(c) the people who campaign for the conservation of forests
(d) the people who live in urban areas

Q 44 | Page 259

The river water is said to be polluted with acidic wastes if the pH of river water is :
(a) zero
(b) above 7
(c) below 7
(d) exactly 7

Q 45 | Page 249

The major programme started to replenish the damaged forests is called :
(a) horticulture
(b) tissue culture
(c) agriculture
(d) silviculture

Q 46 | Page 260

With which tree Amrita Devi Bishnoi is associated?
(a) khajoor
(b) khejrali
(c) khejri
(d) keekar

Q 47 | Page 260

The poisonous gas which reduces the oxygen-carrying capacity of blood to a large extent is :
(a) SO2
(b) NO
(c) CO
(d) CO2

Q 49 | Page 260

Which of the following is not an ancient water harvesting structure?
(a) kattas
(b) sargam
(c) kulhs
(d) surangams

Q 50 | Page 260

Snakes are killed in large numbers because :
(a) they are very poisonous
(b) they kill rats
(c) their skin is expensive
(d) they damage the crops

Q 51 | Page 260

Which of the following is not a natural resource?
(a) soil
(b) water
(c) electricity
(d) natural gas

Q 53 | Page 260

The most rapidly dwindling natural resource in the world is :
(a) water
(b) soil
(c) sunlight
(d) forests

Q 54 | Page 260

Which of the following is not a natural resource?
(a) snake
(b) wind
(c) wooden house
(d) mango tree

Q 55 | Page 260

The three R's which can 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

Q 56 | Page 260

The main reason for the abundant coliform bacteria in the water of river Ganga is :
(a) immersion of ashes of the dead into the river
(b) washing of clothes on the banks of river
(c) discharge of industrial wastes into river water
(d) disposal of unburnt corpses into river water

Q 57 | Page 260

The pH of a sample of water collected from a river is found to be in the range of 3.5 to 4.5. The most likely reason for this is the waste being discharged into the river from a :
(a) soap and detergent manufacturing factory
(b) car battery manufacturing factory
(c) alcohol manufacturing factory
(d) plastic cups moulding factory

Q 58 | Page 260

Which of the following statement is incorrect?
(a) economic development is linked to environmental conservation
(b) sustainable development meets the current basic human needs and also preserves resources for future generations
(c) sustainable development does not take into consideration the viewpoints of all stakeholders
(d) sustainable development is a long planned and persistent development

Q 59 | Page 260

Arabari forest of Bengal is dominated by :

Q 60 | Page 260

Groundwater will not be depleted due to :
(a) process of afforestation
(b) establishing thermal power plants
(c) process of deforestation
(d) cultivation of high yielding varieties of crops

Q 61 | Page 260

Ahars, Kattas, Bhundhis and Khadins are the modes of :
(a) grain storage
(b) soil conservation
(c) water harvesting
(d) cold storage

Q 62 | Page 260

Which of the following combination of terms has no fossil fuel?
(a) wind, ocean, coke
(b) kerosene, tide, wind
(c) wood, wind, sun
(d) petrol, wood, sun

Q 63 | Page 260

The use of one of the following is eco-friendly. This one is :
(a) cars for transportation
(b) polybags for shopping
(c) windmills for generating power
(d) dyes for colouring clothes

Q 64 | Page 260

Khadins are used in Rajasthan to :
(a) hold water for irrigation
(b) recharge groundwater
(c) promote soil erosion
(d) trap wild animals

Q 65 | Page 260

In a village, farmers started cultivating crops all around a lake which was always filled with water. They added lot of materials W to the soil in their fields to increase the yield of crops. Soon they found that the whole surface of water in the lake was covered with a green layer made up of tiny organisms X. After some time, the fish present in the lake started dying in large numbers because they could not get sufficient Y due to a process Z which had occurred in lake water and drained out all the Y present in the water of lake.
(a) What do you think materials W are?
(b) Name (i) X, and (ii) Y.
(c) What is the process Z known as?
(d) What happens during the process Z which uses up all the Y present in lake water?
(e) What does this example tell us about the use of materials like W?

Q 66 | Page 261

There were lot of organisms A in the crop fields in an area. These organisms used to feed on organisms B also present in the crop fields but which damaged the standing crops. One day some people arrived in the fields and killed all the organisms A so that they could remove their C for making fancy items which were in great demand. Due to large scale killing of A, the population of B increased too much damaging all the crops in the area and causing a famine-like situation. Apart from A, there is another organism D which can also kill and eat B. Name A, B, C and D.

Q 67 | Page 261

There are two important fuels A and B both of which are extracted from deep inside the earth. Fuel A is a thick, dark, foul smelling liquid whereas fuel B is a black solid. Combustion of both the fuels produces products, C, D, E and F. The product C makes the rainwater only slightly acidic but it is mainly responsible for causing global warming. The product D is neither acidic nor basic. It is harmless and does not affect the environment in any way. Both E and F attack breathing system of humans and are mainly responsible for causing acid rain. In addition to combustion of fuels A and B, the product F is also formed when lightning occurs in the sky.
(a) What are (i) fuel A, and (ii) fuel B?
(b) Name (i) C (ii) D (iii) E, and (iv) F
(c) What is the process of formation of F during lightning known as?
(d) Which fuel is supposed to be exhausted sooner : A or B?
(e) Which fuel is mostly used for generating electricity at thermal power plants?

Q 68 | Page 261

A man bought a device X which could cook pulses, vegetables and rice without using any fuel like wood, coal, kerosene or LPG, etc. This device did not work at night. It also took a lot of time for cooking.
(a) Name the device X.
(b) What is the source of energy which cooks food in this device?
(c) What is the name of the process which traps energy in this device?
(d) State one advantage (other than saving on fuel) or using such a device for cooking food.

Q 69 | Page 261

A person buys two electrical devices P and Q for lighting purposes in his house. The device P consumes only 5 units of electricity in a month but device Q consumes 15 units of electricity in a month when used for the same number of hours daily. The device Q wastes a lot of electricity by radiating energy C but P does not do so.
(a) What type of device is (i) P, and (ii) Q?
(b) Name one component which is present in Q but not in P.
(c) Name the energy C.
(d) Which device is more energy efficient : P or Q?
(e) Which fossil fuel is most likely to be conserved if all of us switch over to devices like P?

Q 70 | Page 261

Lakhmir Singh Biology Class 10 (2019 Exam)

Biology for Class 10 (2019 Exam)