Home Preparation for National Talent Search Examination (NTSE)/ Olympiad
Chapter : 1. Minerals and Energy Resources
Glossary (Minerals and Energy Resources)
1. Mineral : A substance which is found in the earth’s crust and which generally has a definite chemical composition. 2. Mineral Ore : It is the raw material extracted from the earth mixed with soil and other impurities. 3. Mining : It is an economic activity of extracting minerals from the earth. 4. Fossil-Fuels : There are fuels formed by the decomposition of organism under the earth or sea bed. 5. Non ferrous minerals : Minerals devoid of iron contents are termed as non ferrous minerals. e.g. Zinc, lead. 6. Ferrous Minerals : There are metals which contain Iron. e.g. Iron and Manganese ore. 7. Thermal electricity : The electricity produced by using coal, petroleum, atomic minerals. 8. Hydro electricity : The electricity generated by water. 9. Conventional resources : These are non renewable sources of energy. e.g. coal. 10. Non-Conventional resources : There are renewable sources of energy. e.g. solar energy. 11. Galena : It is an Ore of Lead.