Tnpsc and Upsc Notes Pdf
Geological Time Division It is the calendar of events of earth History. It is subdivided into eons, eras, periods, epochs and ages. It is used by Paleontologist, geologists to demonstrate the associations and timing of events. Eons are the longest time division and ages is the shortest. The era we live in the Holocene epoch, … Read more
Interior of the earth The earth’s interior can only be understood by indirect methods, as no one has gone deep inside the earth, due to high temperature and pressure. The surface of the earth is due to a number of processes that happen deep inside the earth. The surface of the earth is due to … Read more
Ocean floor configuration It helps in the know about the distribution of continents and oceans. the ocean floor is divided into three divisions based on its depth and as well the forms of relief. The division is known as Continental Margin, deep-sea basin and mid-ocean ridges. The Ocean floor configuration Continental Margins Continental Margins are … Read more
Crop calendar Tamil Nadu Planting Seasons in Tamil Nadu is classified into 8 types. They are: Navarai Sornavari Kar Kuruvai Early Samba Samba Late Samba/Thaladi/Pishanam/Late Pishanam Late Thaladi The crop calendar in Tamil Nadu is classified into 8 based on the Month of Sowing, Duration or Day. This duration is classified into Short duration, Medium … Read more
Savanna food web The Primary consumer in the Savanna food web is Zebras and elephants. The Secondary consumers are cheetahs, hyenas, etc. The Scavengers here are vultures, hyenas, and termites. The reason hyena is present in both Secondary and Scavenger is because it gets their food by hunting in groups and also Scavenging on dead … Read more
North east monsoon in India North east monsoon in India is also called as Post Monsoon or Retreating Monsoon. The southwest monsoon starts in North India by the end of the second half of September because of the southward shifting of pressure belts. This wind gets backs from the Indian peninsula and blows towards the … Read more
Direction of South West monsoon in India The Bay of Bengal wind moves to northeast India, Myanmar and this wind is trapped by mountain groups such as Khasi, Garo, and Jaintia. This results in the heaviest rainfall in the world, that is Mawsynram located in Meghalaya. Then it moves to the west, which results in … Read more
Theory of plate tectonics The theory of plate tectonics is a scientific theory that explains the formation of major landforms due to the earth’s underlying movements. What is the theory of plate tectonics? The interest in the distribution of oceans and continents came to life after the introduction of the concept of seafloor spreading. After … Read more
Continental drift theory It is a Hypothesis, theory regarding the formation of the continents. When we look at the shape coastline of the Atlantic Ocean, the symmetry of the coastlines on either side of the ocean creates a curiosity in us. This made many scientists think that the Two American continents, Europe and Africa were … Read more
Forest in Tamil Nadu In Tamilnadu, the forest into divided into three major groups as per the temperature. They are Tropical Forest, Montane Subtropical forest, and Montane Temperate Forest. These are further divided based on moisture and physio-gnomic variations. Tropical Evergreen Forest The tropical evergreen forest is found in the regions which receive heavy rainfall. … Read more