Biology

Management of Natural Resources

Question:

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

Answer:

The ‘Khadin’ system of rainwater harvesting in Rajasthan is a very long (100 m – 300 m long) earthen embankment called ‘Bund’ built across the lower edge of the sloping farmland. The rainwater from the catchment area flows down the slopes and stopped by the ‘Bund’ to form a reservoir. The rainwater which collects in the reservoir formed by the ‘Bund’, and in the well, seeps slowly into the land (or ground). This water – saturated land is subsequently used for growing crops.

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Management of Natural Resources

Q 1.

Is water conservation necessary? Give reasons.

Q 2.

What is meant by “sustainable development” ?

Q 3.

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

Q 4.

Why must we conserve our forests? List any two causes for deforestation to take place. [Delhi]

Q 5.

Suggest any four changes that you would like to incorporate in the life style of students of your age to move towards a sustainable use of available resources. [All India Delhi 2008(C)]

Q 6.

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 7.

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

Q 8.

Suggest some approaches towards the conservation of forests.

Q 9.

Name the rivers with which the following dams are associated :
Name the rivers with which the following dams are associated :
(a) Tehri Dam
(b) Sardar Sarovar Dam
(c) Bhakra Dam

Q 10.

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

Q 11.

Why do you think there should be equitable distribution of resources? What forces would be working against an equitable distribution of our resources?

Q 12.

Give two examples each of the following:

  1. Renewable sources of energy
  2. Non-renewable sources of energy. [All India]

Q 13.

Define:

  1. Biomass
  2. Anaerobic degradation [Foreign]

Q 14.

List the products of combustion of fossil fuels. What are their adverse effects on the environment? [All India]

Q 15.

State the meaning of “sustainable management”. Reuse is better than recycling. How? [Foreign]

Q 16.

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

Q 17.

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

Q 18.

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

Q 19.

Why should we conserve forests and wildlife ?

Q 20.

(a) State the advantages of constructing dams across the rivers.
(b) Describe some of the problems associated with the construction of dams.

Q 21.

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 water body 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.

Q 22.

State two reasons each of conserving (a) forest and (b) wildlife. [All India(Q)]

Q 23.

What is a dam? Write two main advantages and two ill-effects of constructing a big dam. [Delhi(C)]

Q 24.

What is meant by wildlife? How is wildlife important for us? [Foreign]

Q 25.

What is meant by exploitation of resources with short-term aims? List its four advantages. [Delhi(C)]

Q 26.

List four advantages of water stored in the ground. [Delhi]

Q 27.

Fill in the following blanks with suitable words :Fill in the following blanks with suitable words :
(a) LPG is a ……………fuel but biogas is not a…………. fuel.
(b) Glaciers are a source of…………………..
(c) One of the main aim of management of forests and wildlife is to conserve the……………….which we haveinherited.
(d) Khadin is a traditional………………………..harvesting system in Rajasthan.
(e) When a fuel burns in an insufficient supply of air, then some poisonous gas called ……………………….. is also produced.

Q 28.

List any four advantages of water harvesting. [All India; Foreign]

Q 29.

What is the main purpose of rainwater harvesting ?

Q 30.

List any two traditional systems of water harvesting. [Foreign]

Q 31.

Name any four categories of people who depend on the forest resources, mentioning major needs of each category. [Foreign]

Q 32.

“Burning fossil fuels is a cause of global warming.” Justify this statement. [Delhi]

Q 33.

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

Q 34.

Suggest three ways to maintain a balance between environment and development to survive. [Delhi]

Q 35.

Why are forests considered “biodiversity hot spots”? List two ways in which an individual can effectively contribute to the management of forests and wildlife. [Foreign; All India 2010]

Q 36.

What changes can you make in your habits to become more environment-friendly?

Q 37.

Name the major programme started to replenish forests.

Q 38.

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

Q 39.

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 40.

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

Q 41.

(a) Locate and name the water reservoirs in figures (a) and (b).
(b) Which has an advantage over the other and why?
ncert-exemplar-problems-class-10-science-chapter-16-management-natural-resources-1
ncert-exemplar-problems-class-10-science-chapter-16-management-natural-resources-2

Q 42.

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

Q 43.

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

Q 44.

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 45.

Write the full names of (a) CFL, and (b) CFC.

Q 46.

Why is the process of ‘reuse’ better than that of ‘recycling’ ?Why is the process of ‘reuse’ better than that of ‘recycling’ ?

Q 47.

What is ‘Chipko Movement’? Why should we conserve forests? [All India]

Q 48.

How do advantages of exploiting natural resources with short-term aims differ from the advantages of managing our resources with a long ¬term perspective? [Foreign]

Q 49.

What are non-renewable resources of energy? Give two examples of such resources. [Delhi]

Q 50.

List any four disadvantages of using fossil fuels for the production of energy. [All India]