Interior of earth,

  Most of the knowledge we have about Earth’s deep interior comes from the fact that seismic waves penetrate the Earth and are recorded on the other side.  Earthquake ray paths and arrival times are more complex than illustrated in the animations, because velocity in the Earth does not simply increase with depth. Velocities generally … Read more

Origin and evolution of earth

    Beginning of the Universe started about 13.6 billion years ago,when the Big Bang created the universe from a point source. During this process, light elements, like H, He, Li, B, and Be formed. From this point in time, the universe began to expand and has been expanding ever since. Concentrations of gas and … Read more

Continental Drift Theory – Tectonics

  The continental drift theory is the theory that once all the continents were joined in a super-continent, which scientists call Pangaea. Over a vast period of time, the continents drifted apart to their current locations. Alfred Wegener first supported continental drift. Wegener’s explanation of continental drift in 1912 was that drifting occurred because of … Read more

Orogenic or the mountain-forming movements

  Orogenic or the mountain-forming movements act tangentially to the earth surface, as in plate tectonics. Tensions produces fissures (since this type of force acts away from a point in two directions) and compression produces folds (because this type of force acts towards a point from two or more directions). In the landforms so produced, … Read more

Earth Movements – Endogenetic Movements

  The interaction of matter and temperature generates these forces or movements inside the earth’s crust. The earth movements are mainly of two types: diastrophism and the sudden movements. The energy emanating from within the earth is the main force behind endogenic geomorphic processes. This energy is mostly generated by radioactivity, rotational and tidal friction … Read more

Earth’s Layers – Earth’s Composition

  The Crust of Earth It is the outermost and the thinnest layer of the earth’s surface, about 8 to 40 km thick. The crust varies greatly in thickness and composition – as small as 5 km thick in some places beneath the oceans, while under some mountain ranges it extends up to 70 km … Read more

Earth’s Interior – Earthquake Waves – Shadow Zone

  Most of the knowledge we have about Earth’s deep interior comes from the fact that seismic waves penetrate the Earth and are recorded on the other side.  Earthquake ray paths and arrival times are more complex than illustrated in the animations, because velocity in the Earth does not simply increase with depth. Velocities generally … Read more

JPSC Mains Paper 3:SOCIAL SCIENCES (History and Geography) Notes

Detailed Notes for JPSC Mains Paper III Notes- Detailed topicwise Jharkhand Mains GK Notes for JPSC Mains Exam are provided for free browsing. Jharkhand (JPSC) Mains Notes are designed by JPSC Toppers and other civil servants. Detail Notes can be browsed at the following links. Section (A) – History: 100 Marks Section (B) – Geography: … Read more

Jharkhand Geography- for Jharkhand PCS Exam of JPSC

Detailed Notes for Jharkhand Geography Specifically designed Notes for Jharkhand Geography can be Bought at minimum price in PDF or Printed format Geography of Jharkhand plays a crucial role in not only Jharkhand PSC Prelims Exam but even JPSC Mains Exam. Jharkhand Geography Notes are designed by JPSC Toppers and other civil servants. Detail Notes … Read more

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