विस्तृत पाठ्यपुस्तक-आधारित अवधारणाएँ
Mineral occurrence
Minerals occur in veins and lodes, layers, alluvial deposits and other geological formations. Their distribution is uneven and closely related to rock structure.
Metallic minerals
Ferrous minerals such as iron ore and manganese are महत्त्वपूर्ण for metallurgy and उद्योग. Non-ferrous minerals such as copper and bauxite support electrical, engineering and manufacturing activities.
Non-metallic minerals
Mica, limestone and other minerals are महत्त्वपूर्ण for electrical goods, cement, construction and industrial processes.
Conventional energy
Coal, petroleum, natural gas and electricity from thermal and hydel sources have historically powered transport, उद्योग and households.
Non-conventional energy
Solar, wind, tidal, biogas, geothermal and other alternatives can diversify energy supply and reduce dependence on finite fuels.
Conservation of minerals and energy
Minerals take geological time to form and energy संसाधनों can be depleted. Recycling, efficient technology, renewable energy and careful extraction support संरक्षण.
अंतिम समय की पुनरावृत्ति
Revise the definitions, causes, effects, examples, comparisons and textbook activities. Practise map/figure-based points where applicable and answer the chapter exercises in your own words.