NCERT Solutions for Class 8 Geography Social Science Chapter 3 Mineral and Power Resources

NCERT Solutions for Class 8 Social Science Geography Chapter 3 Mineral and Power Resources contain solutions to the exercises given in the Geography book Resources and Development. These answers have been explained in a manner that you will easily understand all the concepts and get your doubts cleared without even seeking anyone’s assistance. You can read and download all the questions and answers in PDF format.

Class 8 Geography Chapter 3 Mineral and Power Resources Ncert Textbook Questions Solved

Question 1. Answer the following questions.

(i) Name any three common minerals used by you every day.

Answer: Salt, Gold and Copper are three common minerals used everyday

(ii) What is an ore? Where are the ores of metallic minerals generally located?

Answer: A rock from which a particular mineral can be profitably extracted is called an ore. Minerals occur in different types of rocks. Some are found in igneous rocks, some in metamorphic rocks, while others occur in sedimentary rocks. The ores of metallic minerals are found in igneous and metamorphic rock formations that form large plateaus.

(iii) Name two regions rich in natural gas resources.

Answer: Russia and Norway are the two regions rich in natural gas resources.

(iv) Which sources of energy would you suggest for (a) rural areas (b) coastal areas (c) Arid regions?

Answer: (a) In rural areas – coal, solar energy, bio-gas and firewood can be used as sources of energy.

(b) In Coastal areas – wind power, petroleum and tidal power can be used.

(C) In arid areas, geothermal powers and solar energy are the most suitable sources of energy to be used.

(v) Give five ways in which you can save energy at home.

Answer: We can save energy at home by following the ways as mentioned below:

  • Switching off the electrical appliances when not in use.
  • Using pressure cooker to cook food.
  • Promoting the use of solar energy.
  • Covering the short distances using bicycles or by walking.
  • Turning off the car’s engineat a red light .
  • Using energy-efficient devices such as fluorescent bulbs and tubes

Question 2. Tick the correct Answer.

(i) Which one of the following is NOT a characteristic of minerals?

(a) They are created by natural processes.
(b) They have a definite chemical composition.
(c) They are inexhaustible.
(d) Their distribution is uneven.

Answer: (c) They are inexhaustible.

(ii) Which one of the following is a leading producer of copper in the world?

(a) Bolivia
(b) Ghana
(c) Chile
(d) Zimbabwe

Answer: (c) Chile.

(iii) Which one of the following practices will NOT conserve LPG in your kitchen.

(a) Soaking the dal for some time before cooking it.
(b) Cooking food in a pressure cooker.
(c) Keeping the vegetables chopped before lighting the gas for cooking.
(d) Cooking food in an open pan kept on low flame.

Answer: (d) Cooking food in an open pan kept on low flame.

Question 3. Give reasons.

(i) Environmental aspects must be carefully looked into before building huge dams.

Answer: Environmental aspects must be carefully looked into before building huge dams because of the following reasons:

  • Dams create an imbalance in the earth’s equilibrium.
  • Deforestation leads to environmental pollution.
  • People become displaced.
  • Cities/villages/towns may require shifting causing lot of hardships for the
  • people.
  • Flood threats loom large.
  • Earthquake threats
  • Silting of lakes is a problem

(ii) Most industries are concentrated around coal mines.

Answer: Coal is a source of energy in most industries. It is also used as raw material for several important industries. Hence most of the industries are located around coal mines.

(iii) Petroleum is referred to as “black gold”.

Answer: Petroleum is a thick black liquid. It is an extremely valuable fossil fuel. A variety of products that we use in our daily life like – kerosene, diesel, petrol, wax, plastics, lubricants, etc., are all produced from petroleum. Hence, it is also known as “Black Gold”.

(iv) Quarrying can become a major environmental concern.

Answer: Quarrying can become a major environmental concern because of the following reasons:

  • It may destroy the humus of soil which is much required for the growth of plants and crops.
  • It produces a lot of noise pollution due to use of explosives at times in order to break the huge chunks of rocks.
  • In the process of quarrying lot of dust is generated which causes air pollution and also occupational hazards.
  • Blasting done in the process of quarrying generate vibration which damage in the nearby buildings, dams or any other similar structure.

Question 4. Distinguish between the followings.

(i) Conventional and Non-conventional sources of energy
(ii) Biogas and natural gas
(iii) Ferrous and Non-ferrous minerals
(iv) Metallic and Non-metallic minerals

Answer: (i) Conventional and Non-conventional sources of energy

Conventional sources of energyNon-conventional sources of energy
Have been in common use for a long timeAre not commonly used
Are generally exhaustible.Are generally inexhaustible.
Are generally polluting.Are mostly non-polluting.
Example: Firewood, coalExample: Solar energy, nuclear energy.

(ii) Biogas and natural gas

Biogas gasNatural gas
Formed using organic wastes such as dead plant and animal matter, animal dung and kitchen waste.  Found along with petroleum deposits and gets released when crude oil is brought to the surface.  
It is a non-conventional source of energy.It is a conventional source of energy.  
It is easily available, especially in rural areas.  It is not easily available; very few countries have sufficient natural gas reserves of their own.  
It is polluting; causes greenhouse effect as it releases carbon dioxide.  Is a cleaner fuel.  
Used as a domestic fuel for cooking and lighting.Used as a domestic fuel as well as an industrial fuel.  

(iii) Ferrous and Non-ferrous minerals

Ferrous mineralsNon-ferrous minerals
A metallic mineral that contains iron.  A metallic mineral that does not contain iron.  
Example: Iron ore, manganese.  Example: Gold, silver.  

(iv) Metallic and Non-metallic minerals

Metallic mineralNon-metallic mineral
A mineral containing metal in raw form.A mineral not containing metal.  
Example: Bauxite, iron ore.  Example: Limestone, gypsum.  

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