Mineral and Power Resources Class 8 Notes Geography Chapter 3 - PDF Download
A mineral is a naturally occurring substance having a definite chemical composition. Minerals are formed by natural processes and do not require any human interference. Minerals are generally formed in various environments and under different conditions. Minerals can be made of one element or more than one element combined in different proportions. Minerals are unevenly distributed throughout the space. Some minerals are found in areas that are not easily accessible to humans. A mineral can be identified by its physical characteristics such as colour, density, and strength, and they can also be identified by chemical properties.
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FAQs on Mineral and Power Resources Class 8 Notes CBSE Geography Chapter 3 [Free PDF Download]
1. What do you mean by wind energy?
Wind energy is the energy that is obtained by the speed of moving wind. This source of energy is considered as an inexhaustible or renewable source of energy. Wind energy is obtained when the speed of moving wind rotates the windmill which is connected to a generator that converts the wind energy to electricity. Wind energy can be generally found in open spaces as the wind blows at high speed in these areas. Wind energy is a clean and pure form of energy.
2. What is biogas?
Biogas is the energy that is obtained from organic materials like dead plants, kitchen waste, cow dung, and other organic materials. These organic wastes are put in large containers or pits called biogas digesters and are decomposed by bacterial action. After certain days, The digester emits biogas which is a mixture of methane gas and carbon dioxide. Biogas is considered as an excellent fuel used for cooking. It produces a high amount of heat and light. Biogas is eco-friendly in nature, but producing this energy is challenging as well as costly.