APSC Prelims and Mains Notes, APSC Test Series
Besides the longitudinal divisions, the Himalayas have been divided on the basis of regions from west to east. These divisions have been demarcated by river valleys. Punjab Himalaya: The part of the Himalayas lying between Indus and Satluj has been traditionally known as Punjab Himalaya but it is also known regionally as Kashmir and Himachal … Read more
EROSIONAL LANDFORMS Cirque Cirques are the most common of landforms in glaciated mountains. They are deep, long and wide troughs or basins with very steep concave to vertically dropping high walls at its head as well as sides. A lake of water can be seen quite often within the cirques after the glacier disappears. Such … Read more
Crust: The outer most layer or shell of the earth is known as earth’s crust. On an average it is 30km deep. It can be up to 70km under high mountains and up to 8km under ocean. It represents less than 1% of earth’s total volume and its average density is 2.7 gm/cm3. It is … Read more
Radiocarbon dating is a technique used by scientists to learn the ages of biological specimens – for example, wooden archaeological artifacts or ancient human remains – from the distant past. It can be used on objects as old as about 62,000 years. Here’s how it works. Radiocarbon dating relies on the carbon isotopes carbon-14 and … Read more
Horse latitudes or subtropical highs are subtropical latitudes between 30 and 35 degrees both north and south where Earth’s atmosphere is dominated by the subtropical high, an area of high pressure, which suppresses precipitation and cloud formation, and has variable winds mixed with calm winds. The consistently warm, dry, and sunny conditions of the horse … Read more
Atomic minerals are the most important among non-fossil energy resources. They are found in the slate rocks of the pre-Cambrian (Archean Schist) and Dharwar periods in India. Uranium and Thorium are major minerals for the production of atomic energy. Uranium is mined directly whereas for thorium is obtained mainly from monazite and limonite. Thorium is … Read more
Most important sorts of ocean deposits are: Terrigenous Deposits Body of water Deposits. There are loose sediments, deposited on the ocean bottom. These are ocean deposits. They vary from location to location. The study of ocean deposits is vital in beneath standing the rocks exposed on the earth’s surface that were once set under ocean. … Read more
The Inter Tropical Convergence Zone (ITCZ) or Thermal Equator is a broad trough of low pressure in equatorial latitudes (it always remains on the north of the equator due to effect of landmass). This is where the northeast and the southeast trade winds converge and this is a low pressure zone. This convergence zone lies … Read more
As urban areas develop, changes occur in their landscape. Buildings, roads, and other infrastructure replace open land and vegetation. Surfaces that were once permeable and moist become impermeable and dry. These changes cause urban regions to become warmer than their rural surroundings, forming an “island” of higher temperatures in the landscape. Heat islands occur on … Read more
Grid management on regional basis started in sixties. Initially, State grids were inter-connected to form regional grid and India was demarcated into 5 regions namely Northern, Eastern, Western, North Eastern and Southern region. In October 1991 North Eastern and Eastern grids were connected. In March 2003 WR and ER-NER were interconnected . August 2006 North … Read more