BharatNotes Physiography
nounUsage in a UPSC answer
A sound appreciation of India's physiography, from the youthful Himalayan ranges to the peninsular plateau and the alluvial plains, is indispensable for framing region-specific policies on water management, disaster mitigation and sustainable agriculture.
Synonyms
Antonyms
Word Family
physiographer (n), physiographic (adj), physiographical (adj), physiographically (adv)
Root
Greek phusis = nature; graphō = to write; via French physiographie (1799)
Etymology
From French physiographie, combining Greek phusis ("nature") and grapho ("to write"); earliest recorded use in English dates to 1799 in Immanuel Kant's Essays & Treatises.
Memory Hook
"Physio" (nature/physical, as in physiology) + "graphy" (describing/mapping) = describing the physical Earth, its natural lay of the land.
How This Word Works in UPSC Writing
The description and classification of the Earth's physical features. India is conventionally divided into six physiographic units: the Northern and North-eastern Mountains, the Northern Plain, the Peninsular Plateau, the Indian Desert, the Coastal Plains and the Islands. The reason this matters beyond description is that each division carries a different age and origin, and therefore a different endowment. The Himalayas are young fold mountains still rising and seismically active, which is why they generate earthquakes and landslides. The Peninsular block is among the oldest and most stable parts of the crust, which is why India's minerals sit in its ancient crystalline rocks. The Northern Plain is a recent alluvial fill, which is why it has deep fertile soil and almost no minerals. Old plateau for minerals, young mountains for hazards, new plains for soil is the most transferable idea in the subject.
Don’t Confuse It With
Physiography describes and classifies landforms, while geomorphology studies the processes that produce them, so one asks what and the other how. Topography refers to the surface configuration of a particular area including its relief and elevation. Relief is specifically the difference in elevation within an area. Geology concerns the rocks and structures beneath, which physiography expresses at the surface.
Hindi Meaning
भू-आकृति विज्ञान (bhū-ākriti vigyān); भौतिक भूगोल for physical geography.
Common Questions
- What are India's physiographic divisions?
- The Northern and North-eastern Mountains, the Northern Plain, the Peninsular Plateau, the Indian Desert, the Coastal Plains and the Islands.
- Why are most of India's minerals in the Peninsular Plateau?
- Because it is an ancient, stable landmass of crystalline rock, whereas the Northern Plain is recent river-laid alluvium and the Himalayas are young sedimentary and metamorphic mountains.
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