Important Questions for CBSE Class 8 Social Science Resources and Development Chapter 3 - Mineral and Power Resources

Very Short Answer Questions: 1 Mark

1. Fill in the blanks:

i. Petroleum is called _____.

Ans: Black gold

ii. ______ is the process to take out minerals from the rocks.

Ans: Mining

iii. _____ is a consumable mineral.

Ans: Salt

iv. 3Rs stand for ____, ____ and ____.

Ans: Reduce, Reuse, Recycle

2. State true and false.

i. Rajasthan, Andhra Pradesh and Jharkhand are all producers of mica.

Ans: True

ii. Chile is a leading producer of copper in the world.

Ans: True

iii. Cooking food in an open pan kept on low flame will not conserve LPG in the kitchen.

Ans: True

iv. Wind energy is a non-renewable source of energy.

Ans: False

3. Match the following-

Ans:

i. Kalpakkam-Nuclear power plant

ii. Wind-Inexhaustible source of energy

iii. USA-World’s largest geothermal power plant

iv. France-First tidal energy station

4. Choose the correct option

i. _______ is a leading producer of iron.

1. Asia

2. Europe

3. North America

4. Australia

Ans: b. Europe

ii. _______ is the largest producer of bauxite.

1. Africa

2. Australia

3. South America

4. North America

Ans: b. Australia

5. Define the Following

i. Power resources

Ans: Power resources are those that supply electricity to businesses and households.

ii. Nuclear Power

Ans: It is a method of obtaining energy or electricity from the energy stored in the nuclei of atoms like thorium and uranium through a series of operations.

Short Answer Questions: 2 Marks

6. Name three common minerals used in daily life.

Ans: The three most frequent minerals found in daily life are gold, iron, and salt.

7. Name the different procedures which are used to extract minerals from the earth.

Ans: Drilling, mining, and quarrying can all be used to harvest minerals from deep into the earth.

8. Where is the Krishna-Godavari delta found?

Ans: Two places with abundant natural gas resources are the Krishna-Godavari delta area and the Netherlands.

9. Differentiate between ferrous and non-ferrous metals.

Ans: Ferrous minerals, as their name suggests, contain iron, whereas non-ferrous minerals don't.

10. What do you mean by “Black Gold”?

Ans: Because of its enormous worth and indispensability in today's age of countless automobiles and industries, petroleum is usually referred to as "black gold."

Short Answer Question: 3 Marks

11. Why are the industries concentrated towards coal mines?

Ans: For most sectors, coal is one of the most affordable and readily available energy sources. As a result, to save money on transportation, most enterprises cluster around coal mines.

12. Define Ores.

Ans: Ores are rocks from which minerals can be mined in order to make a profit. Metallic mineral ores are typically found in igneous and metamorphic rock formations that contribute to plateau creation.

13. Suggest some sources of energy for rural, coastal and arid areas.

Ans: The following are some energy options for rural, coastal, and arid areas:

1. Wood, coal, biogas, and solar energy can all be used as energy sources in rural locations.

2. Petroleum, wind power, and tidal power can all be used to generate energy in coastal areas.

3. Geothermal and solar energy can be used to generate electricity in arid locations.

14. What do you mean by metallic and non-metallic minerals?

Ans: Metallic minerals are those that contain metals in their chemical makeup, whereas non-metallic minerals are those that do not contain extractable metals.

15. What is biogas?

Ans: Biogas is energy produced from biological waste, whereas natural gas is energy recovered from the depths of the earth alongside petroleum and is readily available.

Long Answer Questions: 5 Marks

16. Quarrying could be a disaster, explain.

Ans: Quarrying is the process of extracting minerals from the earth's surface.

Quarrying could become a serious environmental hazard since it has the potential to harm the ecology surrounding it or to induce ecosystem imbalance by destroying habitats. The sound created by blasts and heavy machinery used in quarries may cause health problems for the local population. It may also pollute the soil and air. Quarrying generates a great deal of noise and dust. This can have an impact on the environment as well as the human ear.

17. Differentiate between conventional and non-conventional resources of energy.

Ans: Conventional energy sources are ones that have been employed in widespread use for a long time. Coal, petroleum, hydropower, fossil fuels, and firewood are examples of traditional energy sources. Non-conventional energy sources are the newly available and desired energy sources in today's world. Because these resources can be created or generated again, they do not deteriorate with time. Renewable energy sources such as wind, sun, tidal, and organic waste are used in non-conventional energy sources.

18. Define Wind energy.

Ans: The wind is thought to be a limitless source of energy. For a long time, windmills have been used to crush grain and lift water. High-speed winds rotate a windmill that is connected to a generator to create electricity in recent times. In coastal locations and mountain gorges where strong and patterned winds blow, wind farms with batches of such windmills are located. Wind farms in the Netherlands, Denmark, Germany, the United States, the United Kingdom, and Spain are known for generating wind energy.

19. List any five ways to save energy at home.

Ans: The following are five ways to conserve energy at home:

1. Take a carpool to work or school and ride your bike for short distances.

2. When feasible, avoid taking the escalator or lift and instead take the stairs.

3. As much as possible, use solar energy panels for household and industrial applications.

4. When lights, fans, and other electrical appliances are not in use, turn them off.

5. Keep the cooking vessel closed to shorten cooking time and, as a result, use less LPG.

20. What things must be taken into consideration before the construction of a dam?

Ans: When massive dams are being constructed, all environmental factors in the area must be considered. This is to ensure that the planned site is not vulnerable to natural disasters and can withstand large-scale flooding. Otherwise, agricultural land and populated regions in the surrounding area could be destroyed. Dams frequently rob the livelihood of people who live along the river on which the dam is being built, when the river dries up as a result of the dam's water stoppage. The government must make certain that no one's livelihood is harmed.

Benefits of Vedantu from Tasting to Digesting Revision Notes and Worksheets

• The revision notes are compiled following the CBSE Class 8 Social Science. The simpler explanation of all the concepts mentioned in this chapter will help you prepare it easily.

• Refer to the notes whenever you want to resolve doubts on your own. Find out how the experts have explained every concept here in an easy version. Also, determine what do you understand from Resources and Development the explanation given.

• Get your concepts about Resources and Development cleared by using these notes. Learn good food habits and find the answers to exercise questions without any hassle.

• Solve and find out the NCERT Class 8 Social Science worksheets answers for this chapter. Learn how the experts have framed these answers accurately.

Conclusion 

Important Questions for CBSE Class 8 Social Science Resources and Development Chapter 3 - Mineral and Power Resources, serve as a valuable resource for students to enhance their understanding of the essential concepts related to minerals and power resources. This chapter offers valuable insights into the significance, distribution, and utilisation of these crucial resources. By studying this chapter and attempting the important questions, students not only gain a deeper understanding of mineral and power resources but also develop critical thinking and analytical skills. The knowledge of these resources is essential for understanding the economic development, energy needs, and environmental challenges faced by nations around the world.