POPULATION AND RESOURCES

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I. Fill in the blanks

1. The ___________ population puts a lot of pressure on the available resources like land and water.

2. By 2025 ____________ billion people will be affected by severe water scarcity.

3. _____________ affects a large number of people living 110 countries.

4. In the developing countries 95% of the sewage is let into __________.

5. The first Indian Remote sensing satellite IRS IA was launched in ____________.

6. India has 20 percent of the earth’s population.

7. 35 percent of the earth’s land surface is threatened by desertification.

8. Desertification affects a large number of people living in 10 countries.

9. Sputnik I was launched in 1957.

10. The first Indian Remote sensing satellite was IRSIA.

II. Choose the correct answer

1. Fresh water of the Earth is only

a) 30%             b) 0.03%          c) 3%

2. Droughts erosion and global warming are caused due to

a) Deforestation b) Afforestation c) Hunting

3. The first artificial satellite launched by the Soviet Union was________

a) Sputnik I      b) Sputnik II     c) Kitsat

4. India has 20% of the population but the water available is __________

a) 5%               b) 4%               c) 20%

5. Water table is lowered when the ___________ activity increase

a) Mining         b) Huntin         c) Fishing

III. Match the following

1. Agricultural – a) Semi – arid – lands

2. Desertification – b) France

3. Commercial energy – c) Steady growth population

4. LANDSAT – d) Coal and Oil

5. SPOT – e) USA

IV. Answer briefly

1. What are results of over exploitation of resources?

The over exploitation of resources results in water scarcity, deforestation, desertification, food shortages exhaustion of minerals and population.

2. Write the impact of over population on water resources

i) Water use has growing at more than twice the rate of population increase in the last country.

ii) Increasing population over exports and pollutes the surface and underground water.

iii) The water is polluted by Industries. In the developing countries 95% of the sewage is let into rivers.

iv) As the pressure on the water resources intensifies, it lead to tension and conflicts among users.

v) By 2025, five billion people will be affected by the severe water scarcity.

3. Write the ill effects of over Population in the developing countries.

i) Over population puts a lot of pressure on the available resources like land and water.

ii) Growing population put a strain on the local environment and the limited resources.

iii) These countries that struggle to meet the growing demands for food, fresh water, timber and fuel alter the fragile environment.

4. Name the satellites use for earth resources.

i) LANDSAT of USA, SPOT of Pranee KITSAT and yagan of china are important satellites.

ii) India’s first Remote sensing satellite was IRSIA.

iii) IRSIB, IC, ID, P3, P5, P5 CARTOSAT and RESOURCE SAT are other satellite of India used ofr observing earth’s resources.

V. Answer in detail

1. Discuss the Utilization of resources in the developing and developed countries.

i) The increased population puts a lots of pressure on the resource like land and water.

ii) The population increase but the amount of a natural resources remains finite.

iii) Utilization of resources is a common process with both the developers countries and the developed countries.

Developing countries

i) Developing countries with large and growing population put a strain on the total environment and limited resources.

ii) These countries that struggle to meet the growing demands for food, fresh, water, timber and fuel after the fragile environment.

Developed Countries

i) Population pressure in developed countries put a greater strain on global resources and the Environment because of their very high standard of living.

ii) Large and increasing population results in greater pressure on the limited resources.

iii) The over exploitation of resources results in water scarcity, deforestation, desertification, food shortages, exhaustion of minerals and pollution.

2. Large and increasing population exerts pressures on the limited resource’s explain?

i) Large and increasing population results in great pressure on the limited resources. So there is over – exploitation of resources.

ii) The over – exploitation of resources results in water scarcity, deforestation, food shortages, exhaustion of minerals and pollution.

Water

i) Water demand exceed water supply

ii) There is limited supply of fresh water

iii) Increasing population over – exploits and pollutes the surface and underground water.

iv) Water is polluted by Industries

v) Sewage is let into the rivers.

vi) The more pressure on water resources leads to tensions and conflict among users.

Food supply and land availability

i) As population increases food supply has to increase

ii) But existing farmlands decline because of changing land uses

iii) To overcome the shortage of land, man has to clear forests for cultivation.

Deforestation

i) Eighty persent of the world’s natural forest is destroyed by human development activities wee logging, clearing for agriculture and grasing.

ii) Deforestation results in droughts, Soil erosion, flooding and global warming.

Desertification

i) 35% of the earth’s land is threatened by desertification

ii) It effects a large number of people living in 110 countries. Desertification occurs in the semi-arid lands and desertification in impossible to reverse.

MINERALS

I) Minerals are mined for greater depths.

ii) This increases ground pollution and lowers the water table.

Fuel

i) As fuel like coal, oil and natural gas are nonrenewable resource there is a decline in the availability of these fuels.

Land degradation

The land is affected by landslides induced by massive deforestation, Soil erosion, decline in Soil fertility, extensive water logging and Stalinization in irrigated areas, Unscientific mining quarrying, road building and waste disposal.

3. How are remote sensing satellites helpful in managing resources?

i) As population increasing humans have to find ways and means of finding additional resources of minerals and ground water.

ii) This requires understanding of the distribution and availability of natural resources over the earth.

iii) Earth observation satellites or Remote sensing satellites help in finding and managing resources.

iv) Remote sensing satellites play an important role in natural resources.

v) Important remote sensing satellites are LANDSAT of USA, SPOT of France, KITSAT of Korea and yoagon of china.

vi) The first Indian remote sensing satellites IRSIA was launched in 1988 it was followed by a number of other satellites IRS-IB,1C,1D,P3 etc.,

vii) The remote sensing data provide valuable information about land resources such as geology, sol, vegetation cover, water bodies and minerals.

viii) This information helps countries to plan for a sustainable future.

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