India : Location, Geological Structure and Physiograph - I
Gujarat Board · Class 9 · Social Science
Complete topic list for India : Location, Geological Structure and Physiograph - I in Gujarat Board Class 9 Social Science. Key concepts, sub-topics, and what to focus on for board exams.
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Topics in India : Location, Geological Structure and Physiograph - I
India's Location and Size
- India is located in the Northern Hemisphere and extends to the southern part of the Asian continent
- Mainland India extends from 8°4' to 37°6' North latitudes and from 68°7' to 97°25' East longitudes
- The Tropic of Cancer (23°5' N) passes almost through the middle of India, dividing it into two parts
Strategic Location and Neighbors
- India is strategically located in the Eastern Hemisphere
- Surrounded by Bay of Bengal (east), Arabian Sea (west), Indian Ocean (south)
- Land boundaries: Pakistan & Afghanistan (NW), China, Nepal, Bhutan (N & NE), Myanmar & Bangladesh (E)
Geological Structure and Tectonic Plates
- India's physiography resulted from tectonic and crustal movements
- Earth's crust floats on semi-liquid asthenosphere
- Radioactive heat creates convectional currents breaking crust into tectonic plates
Physiographic Diversity
- India shows remarkable physiographic diversity due to geological history
- Northern region: Lofty Himalayan ranges with plateaus, summits, and passes
- Central region: Great plains formed by Ganga, Yamuna, and Brahmaputra rivers
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