Mode of Occurrence of Minerals
Mode of Occurrence of Minerals
Mineral and power resources are vital for the economic and industrial progress of a nation. Their distribution on the surface of the Earth is highly uneven. The presence or absence of mineral and power resources can have a powerful influence on the relative wealth and economic independence of a country. Naturally occurring substance that has a definite chemical composition is a mineral. Minerals are not evenly distributed over space. They are concentrated in a particular area or rock formations. Some minerals are found in areas which are not easily accessible such as the Arctic Ocean bed and Antarctica. Mineral are formed in different types of geological environments, under varying conditions. They are created by natural processes without any human interference. They can be indentified on the basis of their physical properties such as color, density, hardness and chemical property such as solubility. Minerals are rarely found in the pure state. They are usually found in rocks, combined with other elements. Most minerals are found in such low concentration or in inaccessible place, that their extraction become too expensive or technically difficult, to be profitable. A rock which contains enough mineral to make it economically suitable for mining is called an ore.
Ores are classified as high grade ores and low grade ores. In the high grade ores the mineral content is high and impurities are less. In the low grade ores mineral content is low and impurities are more.
Minerals are deposited and accumulated in the strata of which of the following rocks? | |||
| Right Option : C | |||
| View Explanation | |||
A period of the Earth's geological history which is about 55 million years old was ________________________ | |||
| Right Option : C | |||
| View Explanation | |||
A period of the Earth's geological history which ia about 55 million years old was ______ . | |||
| Right Option : C | |||
| View Explanation | |||
Students / Parents Reviews [10]
My experience was very good with Abhyas academy. I am studying here from 6th class and I am satisfied by its results in my life. I improved a lot here ahead of school syllabus.
Ayan Ghosh
8thMy experience with Abhyas is very good. I have learnt many things here like vedic maths and reasoning also. Teachers here first take our doubts and then there are assignments to verify our weak points.
Shivam Rana
7thAbhyas is a complete education Institute. Here extreme care is taken by teacher with the help of regular exam. Extra classes also conducted by the institute, if the student is weak.
Om Umang
10thAbhyas Methodology is very good. It is based on according to student and each child manages accordingly to its properly. Methodology has improved the abilities of students to shine them in future.
Manish Kumar
10thBeing a parent, I saw my daughter improvement in her studies by seeing a good result in all day to day compititive exam TMO, NSO, IEO etc and as well as studies. I have got a fruitful result from my daughter.
Prisha Gupta
8thI have spent a wonderful time in Abhyas academy. It has made my reasoning more apt, English more stronger and Maths an interesting subject for me. It has given me a habbit of self studying
Yatharthi Sharma
10thAbout Abhyas metholodology the teachers are very nice and hardworking toward students.The Centre Head Mrs Anu Sethi is also a brilliant teacher.Abhyas has taught me how to overcome problems and has always taken my doubts and suppoeted me.
Shreya Shrivastava
8thOne of the best institutes to develope a child interest in studies.Provides SST and English knowledge also unlike other institutes. Teachers are co operative and friendly online tests andPPT develope practical knowledge also.
Aman Kumar Shrivastava
10thIt was a good experience with Abhyas Academy. I even faced problems in starting but slowly and steadily overcomed. Especially reasoning classes helped me a lot.
Cheshta
10thA marvelous experience with Abhyas. I am glad to share that my ward has achieved more than enough at the Ambala ABHYAS centre. Years have passed on and more and more he has gained. May the centre flourish and develop day by day by the grace of God.
