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28 questions · timed · auto-graded

Question 12 Marks
'It is the duty of all of us to conserve resources.' - Explain the statement.
Answer
There is an excessive use of resources due to increasing population and extraordinary development in science and technology, there has been a shortage of certain resources. It will be difficult to maintain today's progress and the modern lifestyle of human in the absence of the resources. It has become inevitable to conserve the resources so that their shortage does not occur in the future. For that, the use of the resources should be well-planned, economical and rational.
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Question 22 Marks
What are the main factors responsible for water crisis ?
Answer
(1) Rain is the main source of water supply in India, which is irregular and uncertain in many areas. This is the main reason why regions with scanty rainfall face water crisis frequently.
(2) There has been an explosive increase in population in last five decades in India. Water crisis in India increases consistently due to factors like increase in cultivation for grains and cash crops for increasing population. growing urbanization, modern lifestyle, deforestation, etc..
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Question 32 Marks
Write a short note about human-resources.
Answer
Man has created civilization in the world. So man himself is a powerful resource. He. through his knowledge and skill, uses various natural elements as the resources. Thus a man is both a creator as well as the user of the resources. In this process, man selects the best elements from the natural elements according to his intelligence. Man can use natural resources to his best only when he has the proper skill. ability, knowledge or technology. Education and health services make man a special resource. That process of human a resource is called 'Human Resource Development".
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Question 42 Marks
Distinguish : Renewable Resources and Non-renewable Resources.
Answer
Renewable Resources Non-renewable Resources
$(1)$ They automati cally replenish in certain time. $(1)$ Once these are used they are impossible to get them or renew them in the near future.
$(2)$ Trees, animals. birds, insolation (sunlight) wind, etc. are renewable resources. $(2)$ Coal. crude oil. natural gas, nuclear minerals, etc. are non- renewable resources.
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Question 52 Marks
Explain the concept. Forest
Answer
Refer to the answer of sub-question $(16)$ of $9.5.$ of Additional Questions - Answers.
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Question 62 Marks
Explain the concept. Natural Vegetation
Answer
Refer to the answer of sub-question $(1)$ of $9. 1.$ of Exercise Questions - Answers
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Question 72 Marks
Explain the concept. Human Resource Development
Answer
Refer to the answer of sub-question $(10)$ of $9.5.$ of Additional Questions Answers
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Question 82 Marks
Explain the concept. Non-renewable Resources
Answer
Refer to the answer of sub question $(8)$ of $9. 5.$ of Additional Questions Answers
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Question 92 Marks
Explain the concept. Renewable Resources
Answer
Refer to the answer of sub question of $(7)$ of $9.5.$ of Additional Questions Answers.
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Question 102 Marks
Explain the concept. Uniquelities Resources
Answer
Those resources which are rarely available at one or two places all over the world are called Uniquelities Resources, eg cryolite. It is available in Greenland of Europe only
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Question 112 Marks
Explain the concept. Rare Resources
Answer
Those resources which are available from limited places only are called Rare Resources eg coal, crude oil. natural gas, various minerals,etc .
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Question 122 Marks
Explain the concept. Common Resources
Answer
Those resources which are generally easily available are called Common Resources: eg. land. water, vegetation, etc.
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Question 132 Marks
Explain the concept. Ubiquitous Resources
Answer
Those resources which are available everywhere with ease are called Ubiquitous Resources eg, the useful gases like oxygen and nitrogen present in the atmosphere.
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Question 142 Marks
Explain the concept. Human made Resources
Answer
When a human processes change the basic characteristics of the natural elements with the help of his knowledge and skill and modifies to make usable are called 'Human made Resources'. Cement. electricity, buildings, roads, bridges. terraced farms, multi-purpose projects, tunnels, technology, etc. are Human made Resources.
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Question 152 Marks
Explain the concept.Natural Resources
Answer
Those elements which are obtained in nature and which can be used without much processing are called 'Natural Resources' Air. water, land, minerals, energy resources. etc are natural resources. All the elements in the environment that are suitable for human use are natural.
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Question 162 Marks
Explain the concept. Resource
Answer
Resources are the foundation for the economic growth and development of human society. Our needs or the necessities are satisfied through the resources. When a human uses his capacities or skills to utilise the natural elements for satisfying his needs, they are called resources. Utility is a characteristics of resources.
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Question 172 Marks
Which energy resources should be considered as an alternative to the traditional energy resources?
Answer
As an alternative to the traditional energy resources, the use of energy resources like solar energy. wind energy, tidal energy, geothermal energy, etc. should be considered.
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Question 182 Marks
What should be done to solve the problem of agriculture? severe shortage of water in agriculture?
Answer
To solve the severe shortage, the rain water (storm water) should be preserved by constructing check dams. Besides, khet talavdi (a pond in the farm) should be constructed to conserve the rainwater.
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Question 192 Marks
What should be done to maintain the balance among wildlife?
Answer
To maintain the balance among the wildlife, the hunting should be stopped by enacting stringent laws and they should be implemented very strictly.
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Question 202 Marks
To whom do the pesticides pollute in agriculture? What should be done as an alternative?
Answer
The pesticides in agriculture pollute soil and the sources of water. So as an alternative. bio-pesticides should be used in farms instead of pesticides.
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Question 212 Marks
What is Human Resource Develop-ment'?
Answer
Education and health services make man a specific type of resource. This process of making human a resource is called Human Resource Development.
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Question 222 Marks
What are called Human made resources?
Answer
When a human processes change the basic characteristics of the natural elements with the help of his knowledge and skill and modifies to make usable are called 'Human made Resources' Cement, electricity, buildings roads. bridges terraced farms. multi-purpose projects. tunnels, technology, etc. are Human made Resources.
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Question 232 Marks
Which energy resources should be considered as an alternative to the traditional energy resources ?
Answer
As an alternative to the traditional energy resources, the use of energy resources like solar energy, wind energy, tidal energy, geothermal energy, etc. should be considered.
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Question 242 Marks
What should be done to solve the problem of severe shortage of water in agriculture?
Answer
To solve the severe shortage, the rain water (storm water) should be preserved by constructing check dams. Besides, khet talavdi (a pond in the farm) should be constructed to conserve the rainwater.
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Question 252 Marks
What should be done so that the productivity of the soil is not reduced?
Answer
Drip irrigation system should be implemented so that the productivity of the soil is not reduced.
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Question 262 Marks
What is the effect of excessive irrigation on soil?
Answer
Excessive irrigation reduces the productivity of the soil.
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Question 272 Marks
Which manure should be used in agriculture in place of chemical fertilizers ?
Answer
Natural dung (manure) should be used in place of chemical fertilizers in agriculture.
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Question 282 Marks
What is the impact of using chemical fertilizers in agriculture?
Answer
By using chemical fertilizers for a long period, the quality of the soil is reduced.
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2 Marks Each - Social Science STD 8 Questions - Vidyadip