9th Geography



1. Which one of the following is not a factor of soil formation-inorganic matter

2. Biotic resources are those obtained from the –biosphere

3. Time determines thickness of soil profile

4. Medicinal herbs are commonly found on –palani hills

5. Which one of the following is a leading producer of lignite-Neyveli

6. Which one of the following is not a producer of iron ore-Thiruchirappali


1. Mettur thermal power station –Perambalur

2. Wind energy -5500 MW2

3. Saline soil -Vedaranyam

4. Cinchona -Medicine

5. Solar power -Dharmapuri


1. Define resources?

  • The term resources refers to the natural wealth available on the earth surface for the welfare of mankind.
  • The resources have the three characteristics called utility, quantity, and consumption.

2. Define soil?

  • Soil is the loose material.
  • It forms the upper most layer of the earth.
  • It consist mainly of very small particles.

3. Which are the factors that determines formation of soil?

The factors that determine the formation of soil are

  • Parent rock.
  • Climate.
  • Relief.
  • Time factor.
  • Flora.
  • Fauna and
  • Micro-organism.

4. Define rain water harvesting?

  • Rain water harvesting is the process of collecting rain water from roof tops
  • It directed to an appropriate location
  • There it is stored for ground water recharge

5. What is national park?

An natural area designated to protect the ecological balance of one or more ecosystems for the present and future generation this refered to as national park

6. Name the Hydel power plants of Tamil Nadu

S. No Hydel Power Plant Rivers MW
1. Kundah(I to V) Bhavani 500
2. Mettur tunnel Kaveri 840
3. Aliyar Aliyar 60
4. Kodayar(1,2) Kodayar 100
5. Solaiyar(1,2) Sholayar 95
6. Kadamparai Kadampari 400
7. Lower mettur Kaveri 120
8. Papanasam hydro electric power Papnasam 32
9. Pykara Pykara 150
    Total 2297

7. Difference between conventional sources and non conventional.

Conventional sources Non conventional source
Conventional sources of energy have been traditionally used by mankind for a long time Non conventional power resources are known as renewable resources
It includes fossil fuels like coal and natural gas, oil and nuclear power Sun is the biggest source of non conventional energy sources

8. what are advantages and disadvantages of wind energy

Advantages of wind energy

It is a non polluting source

It involves low cost of production

Disadvantages of wind energy

It causes noise pollution

Wind mills are very costly to set up.

Disturbs radio and TV reception.

9. soil is nin renewable resources explain:

Soil is the non renewable resources which are formed over very long geological periods and are certain to be exhausted in the course of time.

Soil forming processes are controlled by the factors such as parent rock, climate,relief,time factor, flora fauna and microorganism present in a soil.


1. Explain the different types of soil found in Tamil Nadu?

S. No Soil Districts
1. Alluvial soil Thanjavur, Thiruvarur, Nagapattinam, Villupuram,Kuddalore
2. Regur or the Black soil Coimbatore, Madurai,Virudhunagar Thuthukudai, Thirunelveli
3. Red loam Sivagangai, Ramanadhapuram
4. Laterite soil Kancheepuram, Thiruvallur,Thanjavur hill tops of western and eastern ghats
5. Saline soil Predominately in Vedaranyam, Coromandle coast and for about 10 km in all the coastal districts of Tamil Nadu

2. What are the uses of forest:

  • Among the 3000 and more plant species are found in Tamil Nadu, majority of them are found in the mixed deciduous forest.
  • The most note worthly flower of kodaikannal is kurinji flower.
  • It blooms once in 12 years
  • Chincona, the forest product gives the medicine quineine to treat malaria
  • Palmyrah trees are grown abundantly in Thirunelveli district as subsidiary activity to agriculture.
  • Its products are used as raw material for cottagev industries.
  • Eucalyptus trees grown in Nilagiris are used as medicine for curring cold and as pain reliver.
  • Exotic varieties of sandal wood are grown in javadhi hills.
  • These forest contribute a lot to the economy of the stats.

3. Give an account to the mineral resources in the Tamil Nadu.

Minerals are classified in to three categories.

Minerals District
Iron ore Salem, Namakkal, And Thiruvannamalai
Copper Salem,Nilgiris, Coimbatore, Madurai
Bauxite Salem,Nilgiris, Coimbatore, Vellore Dharmapurai
Chromite Salem, Namakkal, Thiruchirappalli and Erode
Pyrite  Villupuram

Non Metallic Minerals Of Tamil Nadu

Minerals Districts
Lime stone Virudhunagar, Thuthukudi, Thirunelveli, Thiruchirappali, Salem
Mica T Hiruchirappali, Coimbatore and Ramanadhapuram,
Magnesite Salem, Namakkal, Erode and Coimbatore
Steatite Vellore, Cuddalore, Coimbatore, Salem, Thiruchirapalli
Salt Chennai, Thuthukudi, Cuddalore, Nagapattinam
Mineral fuels of Tamil Nadu  
Minerals Districts
Petroleum and lignite Thiruvarur(panamgdi) narimanam(kaveri delta region) neyveli

4. Give an account of thermal power resources of Tamil Nadu

Thermal power resources:

Power generated from non renewable energy resources such as coal, oil and natural gas is known as thermal power. Thermal power is produced by heating the water. The steam thus formed spins the turban to produce electricity.

Name of the plant District Types of fuel MW
Neyveli lignite corporation Cuddalore coal 2490
North Chennai thermal power unit 1 Thiruvallur coal 1200
Thuthukudi thermal power plant Thuthukudi coal 1000
Mettur thermal power station Salem coal 600