E. Answer the questions in 10-20 words.
1. Distinguish between open-pit mining and shaft mining,
2. Which are the major iron producing countries in the world?
3. Name the main producing areas of manganese in India.
4. Name the places in India where aluminium is produced.
5. How is petroleum derived?
6. State the various ways in which natural gas can be used.
Answers
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pata ngi
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10 7-578*&%6889
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Answer:
- Open cast mining in which large pits are dug to excavate the ores lying at shallow depths beneath the surface of the earth. Minerals that lie near the surface are also dug out by the process of quarrying. ... Deep shaft mining in which deep holes are made to reach the ore lying at great depth beneath the crust.
- Top five iron ore producing countries from Australia to Russia
Australia – 930 million tonnes. ...
Brazil – 480 million tonnes. ...
China – 350 million tonnes. ...
India – 210 million tonnes. ...
Russia – 99 million tonnes......
- Madhya Pradesh being the leading manganese ore producing State accounted for 27% of the total production in 2016-17. Next in the order of production were Maharashtra and Odisha (25% each). The remaining production was reported from Andhra Pradesh, Gujarat, Jharkhand, Karnataka, Rajasthan and Telangana (Tables- 3 to 7).
- Petroleum is a fossil fuel, meaning that it has been created by the decomposition of organic matter over millions of years. Petroleum is formed when large quantities of dead organisms–primarily zooplankton and algae–underneath sedimentary rock are subjected to intense heat and pressure.
- In the United States, most natural gas is burned as a fuel. In 2012 about 30% of the energy consumed across the nation was obtained from natural gas [1]. It was used to generate electricity, heat buildings, fuel vehicles, heat water, bake foods, power industrial furnaces, and even run air conditioners!
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