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

Rajasthan Board RBSE Solutions for Class 8 Social Science Geography  Chapter 3 Mineral and Power Resources Textbook Exercise Questions and Answers.

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

RBSE Class 8 Social Science Mineral and Power Resources InText Questions and Answers

Let’s do (Page-26)

Question 1. 
The list uses any five minerals.
Answer:

1. Aluminum: Bauxite is obtained from its ore, which is used for automobiles, airplanes, bottle cap industries, building constructions, and kitchen utensils.
2. Copper: Copper is used in making utensils and electric appliances.
3. Gold: Gold is mainly used in making jewelry. 
4. Asbestos: It is used to make electrical equipment.
5. Iron ore: It is used to make steel. It is also used in different industries, such as the manufacturing of machines.

RBSE Class 8 Social Science Mineral and Power Resources Textbook Questions and Answers

Let’s Recall

Question 1. 
Answer the following questions-
(i) Name any three common minerals used by you every day.
Answer:
Three common minerals used every day are:

• Iron
• Copper
• Aluminum

(ii) What is an ore? Where are the ores of metallic minerals generally located?
Answer:
Various rocks from which minerals are mined are called ores. Metallic minerals are found in igneous and metamorphic rock formations that form large plateaus.

(iii) Name two regions rich in natural gas resources.
Answer:
Two regions rich in natural gas resources are:

• Russia 
• The Netherlands.

(iv) Which source of energy would you suggest for:

1. rural areas 
2. coastal areas 
3. arid regions.

Answer:

1. Source of energy for rural areas - for rural areas we would suggest the use of firewood and biogas as a source of energy.
2. Source of energy for coastal areas - for coastal areas we would suggest the use of wind energy, as well as tidal energy, can also be used.
3. Source of energy for arid regions - for arid regions we would suggest the use of solar energy as a source of energy.

(v) Give five ways in which you can save energy at home.
Answer:
The five ways to save energy at home are as follows:

1. Electric appliances should be used only as per requirements, unnecessary use should be stopped.
2. Minimum electrical appliances should be used in homes.
3. During the day, sunlight should be used. Unnecessary lights should not be used.
4. High - quality electrical devices should be used, which consume less power.
5. Solar-powered appliances should be used. 

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:
(b) Ghana

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

Question 3. 
Give reasons:
(i) Environmental aspects must carefully be looked into before building huge dams. 
Answer:
Environmental aspects must be carefully looked into before building huge dams, otherwise, it may cause disturbance in ecological balance. If the wrong decision is taken in relation to dam formation, this may lead to earthquakes, landslides, and deforestation.

(ii) Most industries are constructed around coal mines.
Answer:
Most of the industries are constructed near coal mines. The main reason for this is that coal is used as a raw material or as fuel in most industries. If the industries are established away from coal mines, it will have to bear the high cost of transportation and will also require more time.

(iii) Petroleum is referred to as “black gold”.
Answer:
Various types of products such as diesel, petrol, kerosene, wax, plastic and lubricants are produced by the processing of unrefined petroleum. All these products are highly valued, hence, the products made from them are called “black gold”.

(iv) Quarrying can become a major environmental concern.
Answer:
Minerals that lie near the surface are simply dugout, by the process known as quarrying. Excessive quarrying causes an imbalance in the environment and also causes land pollution. Quarrying also damages the vegetation cover resulting in ecological imbalance.

Question 4. 
Distinguish between the followings:
1. Conventional and non - Conventional sources of energy
2. Biogas and natural gas
3. Ferrous and non - ferrous minerals
4. Metallic and non - metallic minerals.
Answer:
1. Conventional and non-conventional sources of energy-

2. Biogas and natural gas:

3. Ferrous and non - ferrous minerals:

4. Metallic and Non-metallic minerals: