general science book reference

Jun 30th, 2015
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General Science: • NCERT Science books of class IX and X • NCERT Biology books of class XI and XII • Ebook published by Jagran. Current Affairs of National and International importance: • Newspapers- The Economic Times, The Times of India, The Hindu, Statesman, Telegraph • Periodicals- Frontline, Business Today, Business

Word Count: 5698
Showing Page: 1/21
1. Oceanic Crust density 3 g/cm3 and density of continental crust is 2.7 g/cm32. The Properties of mineralsa. Hardness, Color, Streak (color of powdered mixture), Cleavage, Fracture (way mineral breaks down), specific gravity, Habit, Taste and magnetism3. Igneous rocksa. Acidic Granite, quartz, orthoclase, albite, feldspar High silica contentb. Intermediate Diorite, Biotite, hornblend, feldsparc. Basic Gabbro, Augite, Olivine Low in silica content4. Plutonic Igneous rocks formed at considerable depths Granite and gabbro5. Lava are of two typesa. Basaltic Low viscosity, can spread over large area, Old flood or plateau basalts fed from fissures, Deccan plateau of Indiab. Andesitic lava High viscosity, not freely flowing, usually build up a steep composite volcanic cone of lava, The circum pacific ring of fire is composed of volcanoes of these types6. Caldera - A large volcanic crater, typically one formed by a major eruption leading to the collapse of the mouth of the volcano7. Fumarolic activity - An opening in or near a volcano, through which hot sulfurous gases emerge8. Hypabassal rock - A subvolcanic rock, also known as a hypabyssal rock, is an igneous rock that originates at medium to shallow depths within the crust and contain intermediate grain size and often porphyritic texture. They have textures between volcanic and plutonic rocks.9. 10. Disintegration and decomposition give rise to weathering process11. Basic ro

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