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Placer deposits. Certain minerals occur as alluvial deposits in sands of valley floors and the base of hills, e. These are called placer deposits and contain minerals which are not corroded by water. Ocean waters contain vast quantities of minerals, e. The ocean beds are rich in manganese nodules. It has excellent magnetic qualities and is especially valuable in the electrical industry.
Hematite �It is the most important industrial iron ore in terms of quantity used. Iron ore from these mines is exported to Japan and South Korea. The ore is transported as slurry to a port near Mangalore. Iron ore is exported through Marmagao port. Mica is indispensable for electric and electronic industry because it has � excellent di-electric strength; Low power loss factor; Insulating properties; and Resistance to high voltage. Dangers involved in mining are� The risk of collapsing mine roofs; Inundation, i.
Adverse effects of mining on the environment: The water sources in the region get contaminated; Dumping of the slurry and waste leads to degradation of land and soil; and It also leads to an increase in stream and river pollution. Conservation of minerals is necessary because: The formation of minerals takes a long geological period of millions of years.
They are finite in nature, non-renewable and exhaustible. The rate of replenishment of minerals is infinitely small in comparison to rate of consumption. They have to be preserved for our future generations. Methods of mineral conservation: We should use minerals in a planned and sustainable manner.
Improved technologies need to be evolved to allow use of low grade ores Class 10th Geography Chapter 5 Ncert Solutions Us at low cost. Recycling of metals, using scrap metals and other substitutes. Controlled export of minerals. Energy resources can be classified as conventional and non-conventional sources.
It is used for power generation, to supply energy for industrial and domestic needs. India is highly dependent on coal for meeting its commercial needs. It can easily be converted into other forms of energy�electricity, gas, oil, etc. Coal as an industrial raw material: It is an indispensable raw material for iron and steel industry. It provides raw material for chemical industries and synthetic textile industries. Many coal-based products are processed in industries, e. Power generation industry is mainly based on this fossil fuel.
Occurrence of coal: Gondwana Coal Belt�A little over million years in age. Tertiary coal deposits are only about 55 million years old, i. Distribution of petroleum: Mumbai High�It is an offshore oilfield and is the richest oilfield of India. Ankaleshwar is the most important field; and Assam�It is the oldest oil producing State of India. Important oilfields are Digboi, Naharkatiya and Moran-Hugrijan.
When the structure of an atom is altered, too much energy is released in the form of heat. This heat is utilised to generate electric power. Uranium and Thorium are used for generating atomic power.
These minerals are available in Jharkhand, Aravalli ranges of Rajasthan. Solar Energy: Photovoltaic technology is used to convert solar energy into electricity. The largest solar plant of India is located at Madhapur near Bhuj. Solar energy holds great promises for the future. It can help in minimizing the dependence on firewood and animal dung Class 10th Ncert Geography Chapter 1 Word cakes in rural areas. This will also help in conservation of fossil fuels. Andhra Pradesh, Karnataka, Gujarat, Kerala, Maharashtra and Lakshadweep are also important centres of wind power production.
Biogas: Biogas can be produced from shrubs, farm waste, and animal and human waste. It is more efficient than kerosene, dung cake and charcoal. Biogas plants can be set up at municipal, cooperative and individual levels. The gobar gas plants provide energy and also manure. Tidal Energy: Dams are built across inlets. The water flows into the inlet during high tide and gets trapped when the gate is closed.
Once the tide recedes, the floodgates are opened so that water can flow back to the sea. The flow of water is used to run the turbine to generate electricity. A mw tidal energy power plant is set up by the National Hydropower Corporation in the Gulf of Kuchchh. Geo Thermal Energy: We know that the inside of the earth is very hot. At some places, this heat is released on the surface through fissures. Groundwater in such areas becomes hot and rises up in the form of steam.
This steam is used to drive turbines. They have highlighted the key points on which your answer should be based on. Most often, students tend to write long answers by not discussing the key points which the evaluator prefers to see. This leads to unnecessary deduction of marks, which has a detrimental impact on the student's overall mark sheet. Helps Students to Write on Key Points. The solutions for History Ch 5 Class 10 inspire students to write answers by keeping in mind the key points.
And when you write the key points which the evaluator wants to see, you have a greater chance to score high. Adhering to the CBSE guidelines is quite imperative for students to be successful. As these answers are framed as per CBSE rules, you would score flying marks.
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