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Answers
Multiple Choice Questions.
Q) Which one of the following is an example of biotic resources?
A) Plants.
- Explanation: Biotic resources refer to those resources that are obtained from the biosphere, they include the living resources of the ecosystem. Out of the four options given, only "Plants" are a living thing, therefore plants is our answer.
Q) Which one of the following is an example of a Ubiquitous resource?
A) Air.
- Explanation: Ubiquitous resources refer to those resources that are available everywhere. Out of the given options, Iron ore is found in specific mines, Oil is found in oil reserves, Air is found everywhere, and wheat is found in wheat farms. Therefore our answer is Air since it's available everywhere.
Q) Sunlight is a;
A) Renewable resource.
- Explanation: Non-renewable resources refer to those resources that cannot be renewed or replaced easily or resources that take a very long time to renew. Renewable resources refer to resources that can be easily replenished by natural processes. Biotic resources refer to the living organisms of the ecosystem. Out of the four options, Sunlight is a renewable resource as light is generated through the process of nuclear fusion and can be renewed naturally.
Q) Human needs;
A) Change with time.
- Explanation: We know how population increases over time, and so does the requirements for basic needs like food & shelter [resources]. It's impossible to provide these basic needs to our population without the reforms we've gone through in terms of transport, communication & technology. So yes, our requirements do change over time.
Q) Natural resources are obtained from;
A) All of these.
- Explanation: Natural resources refer to resources that have been obtained directly from nature/the earth that are not man-made. Land, Soil & Water are all directly obtained from nature and are called natural resources.
Q) Which one of these resources is a non-renewable resource?
A) Coal.
- Explanation: Non-renewable resources refer to those resources that cannot be renewed or replaced easily or resources that take a very long time to renew. Out of the given options, Water, Air & Sunlight are renewable resources whereas coal is a non-renewable resource as once it gets exhausted, it won't be replenishable.
Q) For sustainable development, it is important to practise the following:
A) Both (a) and (b).
- Explanation: Each organism has got its own role in the ecosystem, and for a perfect balance, it's important to allow all forms of life to flourish on earth. Reducing depletion of natural resources makes sure that resources aren't being wasted and we have enough to last for the future generations.
Q) Which one of the following is an example of man-made resource?
A) Dams.
- Explanation: Man-made resources refer to those resources that have been created by humans. Out of the four options, Rivers, Glaciers & Mountains exist naturally, whereas dams are a man-made creation.
Fill in the blanks.
1. Anything that can be used to satisfy a need is a resource.
2. A beautiful landscape has an important value.
3. Resources are classified as ubiquitous and localised on the basis of their distribution.
4. Dams, roads and buildings are examples of man-made resources.
5. Hydroelectricity is generated from water resources.
True or False.
1. Value of resources can vary from time to time. - True.
2. Reckless use of soil will not exhaust its fertility. - False.
3. Coal and petroleum can be renewed within a few years. - False.
4. Car-pool will help in reducing the consumption of petrol. - True.
Answer :-
MCQ :-
1) c) Plants
2) c) Air
3) b) Renewable resource
4) a) Change with time
5) d) All of these
6) d) Coal
7) c) Both (a) and (b)
8) b) Dams
Fill in the blanks :-
1) Resource
2) Important
3) Distribution
4) Man-made
5) Water
True or False :-
1) True
2) False
3) False
4) True