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Saturday, December 30, 2017

CBSE Class 10 Management of Natural Resources - Notes

MANAGEMENT OF NATURAL RESOURCES - NOTES & IMPORTANT QUESTIONS

Management of Natural Resources-notes


MANAGEMENT OF NATURAL RESOURCES - NOTES


Natural Resources - The substances present in nature which can be used are called Natural Resources, Ex- Sun, wind, soil, air, water, coal, petroleum.

Pollution - The contamination of air, water, soil with harmful substances is called pollution.

Ganga Action Plan (GAP) - The clearing of river Ganga is taken up by Govt. of India, it is called Ganga Action Plan.

Coliform - It is a bacteria which is found in the intestine of human beings.Their presence in water causes many of diseases. It is due to the contamination of water with waste products (feces), remains of dead bodies.

Carbon prints - The international norms to regulate the emission of carbon dioxide.

Pollutant - The substances which pollute environment are called pollutants.Some of them like Arsenic, coliform in water even present in small amounts can be extremely harmful.

pH - It helps to determine whether water is acidic,basic or neutral. pH of water can be can be tested with the help of universal indicator.

Reduce - We must reduce the use of non - renewable resources of energy like coal, petroleum, natural gas which are limited.

Recycle - Plastic, paper, glass, metals must be recycled so as to protect natural resources.

Reuse - It is better than recycling because it saves energy. Use things again and again, ex - jam or pickle bottles can be reused.

Sustainable development - It is the development which can be maintained over long period of time without causing damage to the natural environment.

Management of Natural resources - It is essential because food, clothes, books, toys, furniture, tools and vehicles are obtained from natural resources.These resources are limited.

Biodiversity -  It refers to the variety within and between all species of plants,  animals,  microorganisms and Ecosystem within which they live and interact.

Hot spots -  Those areas which are full of biodiversity are called Hotspots.ex -  forest are hotspots of biodiversity.

Stake holders -  those people having interest or concern for something are called stakeholders.
1.People living in or around forest: They depend on forest produce for their living.
2.The forest department of the Government: which owns the land and controls the resources from forests.
3.The Industrialist: who use various forest produce as raw material,but are not dependent on the forest in any area.
4.The wildlife and nature enthusiasts: who want to conserve nature.

Wildlife - It means all naturally occurring animals,  plants and their species which are in their natural environment.

Conservation - The protection of natural resources to avoid excessive use and wastage is called conservation.

Afforestation -  planting more trees at home,  on roads,  schools and office building is afforestation,  which helps in cleaning environment.

Amrita Devi Bishnoi National Award -  it is given to the people who helps in wildlife conservation.

Chipko Movement -  women  of village in Garhwal  protected Trees by against destruction of forests hugging the trees,  when they were about to cut.
Role of Chipko Andolan :
  • It helped in conservation and preservation of forests.
  • It taught people that the destruction of forests not only affects the availability of forest products but also quality of soil and sources of water.
  • It forced government to rethink the priorities of the local people in the use of forest produce.
  • It encouraged the participation of the local people in the efficient management of forests.


Water -  water is necessary for all forms of life.
  •  Rain,  river,  oceans,  lakes,  ponds  are Natural sources of water.
  •  Dams,  canal,  water pumps are used to get water for irrigation.
  •  River water is purified and supplied to home in urban areas.
  •  People use well water and hand pump, i.e.  underground water in rural areas.
  •  In Gulf countries,  sea water is made fit for drinking by distillation or reverse   osmosis (R. O.  purifier)


Dams -  These are last barriers built across river and stream to confine and utilise the flow of water for irrigation,  domestic purposes and electricity.
  •  They  are used to save people from floods.
  •  Tehri  damn is the highest dam in Asia, 26 m high on river Ganga.
  •  Hira  Kund dam built across Narmada river is the longest man made Dam( 26 km),  in the world.
  •  Sardar  Sarovar Dam is built on Narmada river.
  •  Bhakhra Nagal Dam  is  Asia’s  Second highest dam,  225.5 m  is built on Sutlej river   in Punjab.


Rainwater  harvesting -  it is the process in which rainwater seeps under the ground so as to recharge the underground water.
Advantages of Rain water harvesting:
  •  Rain water harvesting is being done in urban areas in these days.
  •  Tanks , ponds , tals  are some ancient methods for conservation of rainwater.
  •  There are many advantages of storing the groundwater, e.g.
  •  It  does not evaporate.
  •  It  does not get contaminated by human and animal waste.
  •  It  provides moisture for vegetation and for  rain.
  •  It  spread out to recharge Wells and underground water.


Coal  and petroleum - These are non-renewable sources of energy.
  •  Excessive  use of these  fossil fuels will lead to energy crisis as they are exhaustible.
  •  Cost of coal and petroleum is increasing due to more demand.
  •  Coal  and petroleum are formed by decomposition of remains of plants and animals   under high  pressure and temperature.
  •  It  take millions of years in their formation


 Harmful  effects of fossil fuels -
Air pollution -  combustion of coal and petroleum generates carbon dioxide,  Sulphur dioxide which causes air pollution and acid rain.
Diseases  - Air pollution is the cause of respiratory, heart problems, irritation in Eyes, headache  and depression.
Global  warming -  Carbon dioxide, methane,  water vapours,  nitrous oxide  can trap infrared radiations of sun and causes greenhouse effect which leads to global warming and climate change.
Steps  to conserve fossil fuels -
  •  Electric vehicles  better than vehicles run by fossil fuels.
  •  Switch  off Electric appliances when not in use.
  •  Switch  off the engine at red lights while driving.
  •  Proper  air pressure in tyres,  turning of engines are helpful in saving fuel.
  •  Use  LED, CFL  instead of normal bulbs and tubelight.
  •  Use  Public transport like Metro, Buses  instead of personal vehicle.
  •  Walk  or use bicycle for small distances.
  •  Use stairs instead of lift on escalators.
  •  Use  solar cooler,  solar water heater and solar cells to produce electricity instead of inverter.

                            Class 10 Electricity Practice Questions




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