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

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

1. Answer the following questions.

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

Answer – Some of the common minerals used everyday are:

  • Iron
  • Lead
  • Copper

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

Answer – An ore is a natural occurrence of rock or sediment that contains sufficient minerals especially metals, that can be economically extracted from the deposit. There are iron ores, and copper ores.

The ores of minerals are located under the surface within igneous rocks and metamorphic rocks.

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

Answer – The Digboi Region in India, and Bombay-high are rich in natural gas resources.

(iv) Which sources of energy would you suggest for

(a) rural areas – biogas

(b) coastal areas – tidal energy

(c) Arid regions – solar energy

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

Answer – Ways in which we can save energy at home are:

  • Turn off the fans and light or any orther electronic devices when you leave a room.
  • Using solar cookers and solar geysers
  • Wash your clothes in cold water
  • Judgemental and wise use of LPG gas
  • Set low temperature in the air conditioning devices

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

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.

(ii) Which one of the following is a leading producer of copper in the world?
(a) Bolivia
(c) Chile
(b) Ghana
(d) Zimbabwe

(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.

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

3. Give reasons.

(i) Environmental aspects must be carefully looked into before building huge dams. This is because construction of dams displaces a lot of people and wild animals. This disrupts the ecological balance as many trees has to be cleared and agricultural land reclaimed.

(ii) Most industries are concentrated around coal mines. Coal is an important raw material for many industries, to reduce the transportation cost, the industries are located close to the coal mines.

(iii) Petroleum is referred to as “black gold”.  This is because of its extremely high value and utility. Petroleum when derived in its raw form is black in colour and thus the term black goal.

(iv) Quarrying can become a major environmental concern. Quarrying can lead to producing a lot of dust particles in the soil and air. The organic material in the soil gets depleted and the soil loses its fertility.

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

4. Distinguish between the followings.

(i) Conventional and non-conventional sources of energy: Conventional sources of energy can be exhausted due to over consumption. While non-conventional sources of energy cannot be exhausted.

(ii) Biogas and natural gas: Natural Gas is obtained in natural form while Biogas  is obtained from shrubs, farm wastes, animal and human wastes.

 (iii) Ferrous and nonferrous minerals- Those minerals which has iron content in it are called ferrous minerals while those that do not have iron content are known as non ferrous minerals.

(iv) Metallic and nonmetallic minerals- Metallic minerals refers to the minerals that comprise of metals in raw form. Non-metallic minerals implies the minerals, that do not have minerals in them.

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