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

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

NCERT Solutions for Class 8 Geography Chapter 3 Mineral and Power Resources are given on this page that will definitely useful in improving marks in the examinations. It will make learning and understanding more easier with detailed and accurate NCERT Solutions. Through these NCERT Solutions, students can understand the answers at your own comforts. You will experience the wonder and beauty in all that you are learning.

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

1. Answer the following questions.

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

Solution

Salt, Iron and Copper are three common minerals used every day.

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

Solution

Rocks of which minerals are mined are known as ores. For materials to be called ore of any mineral, they must contain at least adequate quantity of that mineral so they can be extracted profitably.

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

Solution

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

Solution

(a) Biogas energy for rural areas

(b) Hydel and tidal energy for coastal areas

(c) Wind and solar energy for arid regions

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

Solution

Five ways in which energy can be saved at home:

• Switching off lights, fans and other electrical appliances when not in use

• By keeping electrical devices operating efficiently.

• Using energy-efficient devices such as led bulbs and tubes.

• Using energy efficiently while cooking; for example, keeping the lids of pans on while cooking

• Unplugging electrical devices when not in use prevents leakage of electricity; thus saving energy.

• Drying clothes in sunlight instead of electric  dryers to prevent emissions and unnecessary  use of electricity. 

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.

Solution (c) They are inexhaustible.

(ii) Which one of the following is not a producer of mica?

(a) Jharkhand

(b) Karnataka

(c) Rajasthan

(d) Andhra Pradesh

Solution (b) Karnataka

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

(a) Bolivia

(b) Ghana

(c) Chile

(d) Zimbabwe

Solution (c) Chile

(iv) 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.

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

3. Give reasons.

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

Solution

Building huge dams can cause destabilisation of the natural habitats of plants and animals also it can cause flood. These environmental aspects should be  looked into before building dams.  (ii) Presence of coal mines around.

(ii) Most industries are concentrated around coal mines.

Solution

The presence of coal mines around industries reduces costs of transportation and also ensures easy availability of fuel.

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

Solution

Petroleum is referred to as “black gold” because it is black in colour in the crude form and its derivatives are extremely valuable as petroleum itself. A variety of products like kerosene, diesel, petrol, wax, plastics, lubricants etc. are produced from these mineral resources.

(iv) Quarrying can become a major environmental concern.

Solution

The noise generated during quarrying and the fossil fuels burnt while operating it may cause damage to nearby buildings or other structures. The dust generated during quarrying contributes to air pollution, which in turn affects the health of the miners and the local population.

4. Distinguish between the following.

(i) Conventional and non-conventional sources of energy

Solution

Conventional Sources of Energy	Non Conventional Sources of Energy
Conventional power sources are those that have been in use for a long time.	Non-conventional power sources are those power sources that have come into use recently due to the depleting conventional resources and growing awareness.
Examples includes  Fossil fuels and firewood.	Examples includes Solar energy, tidal energy.

(ii) Biogas and natural gas

Solution

Biogas	Natural Gas
Biogas is obtained from the decomposition of organic waste.	1. Natural gas is obtained as a by-product from the extraction of petroleum.
It is a non-conventional source of energy	It is a conventional source of energy
It is a renewable source.	It is a non-renewable source.

(iii) Ferrous and non-ferrous minerals

Solution

Ferrous mineral	Non-ferrous mineral
A metallic mineral that contains iron.	A metallic mineral that does not contain iron.
Example includes Iron ore and manganese.	Example includes Gold and silver.

(iv) Metallic and non-metallic minerals

Solution

Metallic mineral	Non-metallic mineral
A mineral containing metal in raw form.	A mineral not containing metal.
Example includes Bauxite and iron ore.	Example includes Limestone and gypsum