Friday, January 11, 2013

CBSE Class 10 - Science - CH 16 - Management of Natural Resources (Q and A)

Management of Natural Resources
Management of Natural Resources
Why do we need to use our resources carefully?

Q & A

Q1(CBSE 2011): What is coliform bacteria? What does its presence in water indicate?

Answer: Coliform is a group of bacteria which is found in human intestines. Its presence in water indicates contamination by disease-causing microbes. Its high presence in rivers and ponds elevates the risks of water borne diseases like gastroenteritis.

Q2(CBSE 2011): State two reasons of launching "Ganga Action Plan". Which bacteria was found in Ganga water indicating contamination?



Answer: The 'Ganga Action Plan', a multi-crore project was launched to clean river Ganga for the following reasons:
  1. the quality of the water in the Ganga was very poor,
  2. alarming increase of disease causing microbes in the river
  3. pollution due to dumping of untreated sewage and industrial waste.
Fecal  Coliform bacteria was found in large scale in water indicating contamination.


Q3(CBSE 2011): What are the 3R’s in sustainable development?

Answer: Reduce, Recycle and Reuse


Q4: What are the two kinds of natural resources?

Answer: Renewable and Non-renewable natural resources.


Q5(NCERT): What changes can you make in your habits to become more environment friendly?

Answer:  To become more environment friendly we should follow the 3R's (Reduce, Recycle and Reuse).
  1. Reduce: It means minimization of natural resources. We may do the following:
    1. Switch off lights, fans which are not required. 
    2. Repair leaking taps and save water.
    3. Encourage solar cooker use and reduce LPG use. 
  2. Recycle: Instead of extracting or creating new products from raw materials, we can collect old and used material (e.g. plastic, paper, metal, glass etc.) and recycle them to build products.
  3. Reuse: Reuse is better than recycle since recycling use some energy which can be save if we reuse the things again. E.g. bottle of consumed food products can be used to store things like salt, sugar, tea leaves etc.
  4. Educate and Create Awareness: We should educate our neighbourhood about environmental issues and take collateral measures collectively. E.g. we can help other in planting trees in our neighbourhood.
Q6(SQP): List any two common methods  by which solid wastes of urban areas are disposed off?

Answer: Methods are:
  1. Bury in landfills
  2. composting
  3. recycle
  4. incineration (waste treatment)
Nekchand's Rock Garden is the biggest outside art environment in the world based on reuse strategy.


Q7(CBSE 2012): What is reuse strategy? Why it is considered better than recycling strategy?

Answer: Reuse strategy means more than one use. Before discarding things like bags, containers, and other items, if these items are hygienic and we can reuse them for other activities. Reusing products extends their lives. As the process of recycling use some energy, the method of reuse is always
considered better no energy is consumed. e.g. Pieces of coloured glass, cups and plates made of china clay, ceramic tiles, etc. can be used to make decorative wall pieces.


Q8: What is a stakeholder?

Answer: A person who has interests or concerns for some thing is called as stake holder.


Q9: Name the stakeholders who have their dependence on forests?

Answer: Stakeholders of forests are:
  1. Local People of the forest who depend on forests for their survival.
  2. Forest Department, a government body which owns, manages and controls the forest resources.
  3. Industries which use various forest products.
  4. Wild life Conversationalists and enthusiasts who want to conserve nature.

Q10(Value Based): There are certain NGOs which ask people to donate their used clothes, toys, school books, household items. These NGOs segregate the collected items and distribute them to the needy people.
What objectives do these NGOs fulfill by these initiatives?  

Answer: NGOs fulfill the following objectives:
  1. Sensitize people towards community service specially helping people who are socially or economically backward.
  2. Emphasize on Reuse of items thus meeting Sustainable development objectives.


(In progress...)




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