NCERT Solutions for Class 8 Social Science Resources and Development Chapter 3

1. Answer the following questions.

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

Ans: Gold, Silver and Copper are three common minerals used by us every day.

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

Ans: Ores are nothing but rocks which are high in mineral content. A particular type of ore is called as such only if the mineral from it can be extracted profitably.

iii. Name two regions rich in natural gas resources. 

Ans: 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. 

Ans: We would suggest Biogas energy for Rural areas, Hydel and Tidal energy for coastal areas and Wind  and Solar energy for arid regions

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

Ans: Five ways in which we can save energy at home are:

1. By Switching off the lights, fans and other electrical appliances when not in use.

2. By making sure that the devices are operating efficiently.

3. By using energy-efficient devices such as fluorescent bulbs and LEDs.

4. By using energy efficiently while cooking.

5. By unplugging electrical devices when not in use to prevent the leakage of energy.
   
   

2. Tick the correct answer.

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

1. They are created by natural processes.

2. They have a definite chemical composition.

3. They are inexhaustible.

4. Their distribution is uneven.

Ans: (c) They are inexhaustible.

ii. Which one of the following is NOT a producer of mica?

1. Jharkhand 

2. Karnataka

3. Rajasthan

4. Andhra Pradesh

Ans: (b) Karnataka

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

1. Bolivia

2. Ghana

3. Chile

4. Zimbabwe

Ans: (c) Chile

iv. Which one of the following practices will NOT conserve LPG in your kitchen?

1. Soaking the dal for some time before cooking it.

2. Cooking food in a pressure cooker.

3. Keeping the vegetables chopped before lighting the gas for cooking.

4. Cooking food in an open pan kept on low flame.

Ans: (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. 

Ans: Environmental aspects must be carefully looked into before building huge dams due to the following reasons:

• Dams can create imbalance in the earth’s equilibrium if they are quite large.

• Deforestation may lead to environmental pollution.

• People have been displaced to build dams.

• Settlements require shifting causing loss of jobs and livelihood for the people.

• Flood threats are always there near the dams.

• Earthquake threats also remain there around dams.

• Silting of lakes affects the fertility of soil.
  
  

ii. Most industries are concentrated around coal mines.

Ans: Coal can be used as a source of energy and power and also as a raw material in most of the industries. Hence most industries are concentrated around coal mines to save the cost of transportation of coal from the mines to the industries.

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

Ans: 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. We use petroleum products in our day to day life such as nail paint, petrol, candle, latex, etc.

iv. Quarrying can become a major environmental concern.

Ans: Quarrying can become a major environmental concern due to the following reasons:

• It can destroy the humus of soil which is needed for the growth of plants and crops.

• It can produce a lot of noise pollution due to the use of explosives in order to break the huge chunks of rocks.

• In the process of quarrying, a lot of dust is generated which causes air pollution and also certain occupational hazards.

• Blasts done in the process of quarrying generate large vibrations which damage nearby buildings, dams or any other similar structure.
  
  

4. Distinguish between the following.

i. Conventional and Non-conventional sources of energy

Ans: The difference between the conventional and non-conventional sources of energy are:

ii. Biogas and natural gas

Ans: The difference between biogas and natural gas are:

iii. Ferrous and Non-ferrous minerals 

Ans: The difference between ferrous and non-ferrous minerals are:

iv. Metallic and Non-metallic minerals

Ans: The difference between metallic and non-metallic minerals are:

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

NCERT Solutions for Class 8 Social Science Chapter 3 PDF are available easily and free on our online website and app. The material provides all the important questions which are required for exam preparation. All the questions come with the best and explained answers. NCERT Solutions Class 8 Social Science Chapter 3 is the best material to prepare a student to do their best in the exam. This guide gives you a clear idea and outcome with the concepts well explained.

NCERT Class 8 Social Science Resources and Development Chapter wise Solutions

• Chapter 1 - Resources

• Chapter 2 - Land, Soil, Water, Natural Vegetation and Wild Life Resources

• Chapter 3 - Mineral and Power Resources

• Chapter 4 - Agriculture

• Chapter 5 - Industries

• Chapter 6 - Human Resources

NCERT Solutions for Class 8 Social Science Books Available for

• NCERT Solutions for Class 8 Social Science - Resources and Development (Geography)

• NCERT Solutions for Class 8 Social Science - Social and Political Life (Civics)

• NCERT Solutions for Class 8 Social Science - Our Pasts-3 (History)

Chapter 3 - Resources And Development 

NCERT Solutions for Class 8 Social Science Chapter 3 belongs to the chapter named "Mineral And Power Resources". The chapters contain all the information related to minerals and power resources. The chapter contains, about the minerals, the ores, from where we get all the minerals, etc are covered in detail. The material NCERT Solutions for Class 8 Social Science Chapter 3 provides all this information in with a full explanation and concise manner.

Here is some more comprehensive information about the content of the chapter.

Class 8 Social Science Chapter Wise Marks Weightage

Class 8 Social Science of chapter 3 has the highest weightage among all the chapters. In the exam, most of the questions come from this chapter since it is the most important chapter. Using NCERT Solutions for Class 8 Social Science students can perform their best in the exams. The material is prepared with the help of the subject experts who refer the questions which are important for exam preparation.  Since time management is a necessity, you can opt for our solutions that are crisp and neat.

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• The material contains all the topics of the chapter and is arranged one by one pointwise.

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