NCERT Solutions is known as an extremely helpful resource for preparing for the exam. Takshila Learning provides its learners with access to a wealth of NCERT problems of mineral and power resources and their solutions. CBSE Class 8 Geography, Chapter 3 Mineral, and Power Resources NCERT Solutions are built by subject matter experts, so be sure to train learners for a good grade. The questions set out in the NCERT Books are prepared in compliance with the requirements of the CBSE chapter 3 geography class 8.
NCERT Solution For Class 8 Geography, Chapter 3 – Mineral and Power Resources provides us with all-inclusive information on all concepts. As students would have to learn the basics about the subject in class 8, this curriculum for chapter 3 geography class 8 is comprehensive study material, which explains the concepts in a great way.
- Answer the following questions.
(i) Name any three common minerals used by you every day?
Answer: Salt, petroleum and gold are the common minerals that are used by humans on a regular basis.
(ii) What is an ore? Where are the ores of metallic minerals generally located?
Answer: Ores are rocks from which mining is done to extract minerals. Minerals are found in different types of rocks. Some are found in igneous rocks, some in metamorphic rocks, while others are found in sedimentary rocks. Ores of metallic minerals are found in igneous and metamorphic rock formations that form large plateaus.
(iii) Name two regions rich in natural gas resources?
Answer: The United Kingdom and the Netherlands are the major producers of natural gas. Natural gas is found with petroleum deposits and released when crude oil is brought to the surface. It is used as domestic and industrial fuel.
(iv) Which sources of energy would you suggest for (a) rural areas (b) coastal areas (c) Arid regions?
(a) In rural areas – coal, solar energy, bio-gas and firewood can be used as sources of energy.
(b) In Coastal areas – wind power, petroleum and tidal power can be used.
(C) In arid areas, geothermal powers and solar energy are the most suitable sources of energy to be used.
(v) Give five ways in which you can save energy at home.
- Switching off the lights, TV and electric fans, when they are not in use.
- Closing the tap properly, so that it does not drip
- Using pressure cooker for cooking
- Walking or using bicycles for short distance commutes.
- Minimizing the use of refrigerators, air conditioners and lifts.
- 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?
Answer: (d) Chile
(iii) Which one of the following practices will NOT conserve LPG in your kitchen.
(a) Cooking food in an open pan, kept on low flame.
(b) Soaking the dal for some time before cooking it.
(c) Cooking food in a pressure cooker.
(d) Keeping the vegetables chopped before lighting the gas for cooking.
Answer: (a) Cooking food in an open pan, kept on low flame
- Give reasons.
(i) Environmental aspects must be carefully looked into before building huge dams.
Answer: The construction of a huge dam causes massive destruction of natural vegetation and wildlife in areas that are submerged. This is not good for the ecosystem. Therefore, environmental aspects should be carefully looked into before constructing huge dams.
(ii) Most industries are concentrated around coal mines.
Answer: Coal is an important source of energy and hence most of the industries are located around coal mines.
(iii) Petroleum is referred to as “black gold”.
Answer: Petroleum is a thick black liquid and is a valuable resource for various industries. Hence, it is also known as “Black Gold”.
(iv) Quarrying can become a major environmental concern.
Answer: Quarrying creates many problems. Fine dust particles spreads in the air around a quarrying site. Dust particles from quarry can cause respiratory problems. Quarrying also destroys natural vegetation and thus the home of many wild animals.
- Distinguish between the following.
(i) Conventional and non conventional sources of energy
Answer: Conventional sources of energy are those that have been in common use for a long time. Firewood and fossil fuels are the two main traditional energy sources. Whereas, non-conventional sources of energy are alternative forms of energy used in modern times. The use of renewable energy sources such as organic wastes, sorghum and wind energy comes under non-conventional energy sources.
(ii) Biogas and natural gas
Answer: Biogas produced from the conversion of organic waste such as dead plants, animal material, animal dung and kitchen waste is called biogas. Biogas is a mixture of methane and carbon dioxide and produces large amounts of organic manure every year. Whereas natural gas is extracted with petroleum deposits when crude oil is brought to the surface.
(iii) Ferrous and nonferrous minerals
Answer: Ferrous minerals contain iron such as iron ore, manganese and chromites. On the other hand, non-ferrous minerals do not contain iron like gold, silver, copper or lead.
(iv) Metallic and nonmetallic minerals
Answer: Metallic minerals contain metals in raw form. Bauxite and manganese are some examples of metallic minerals. While metals such as limestone, mica and gypsum do not contain minerals and are called non-metallic minerals.
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