WBPSC Prelims and Mains Notes-WBPSC Test Series
El-nino is the classical phenomenon where warming of Pacific ocean takes place near the western coast of Peru and Equador. It occurs at every 3-4 years. It weakens the trade winds and changes in southern oscillation , thereby affects the rainfall pattern across the world. Southern oscillation: Southern oscillation is the alternating of sea level … Read more
Concept of organic farming, seed certification Organic farming is an alternative agricultural system which originated early in the 20th century in reaction to rapidly changing farming practices. Organic farming continues to be developed by various organic agriculture organizations today. It relies on fertilizers of organic origin such as compost manure, green manure, and bone meal … Read more
Continental shield, any of the large stable areas of low relief in the Earth’s crust that are composed of Precambrian crystalline rocks. The age of these rocks is in all cases greater than 540 million years, and radiometric age dating has revealed some that are as old as 2 to 3 billion years.Shield areas in general are … Read more
Earth magnetism is the property of earth behaving like a dynamo and showing magnetic property just like that of a magnetic bar. There are various theories behind this property. There is no valid reason for the cause of earth’s magnetism or why earth has giant magnetic field but there are some theory related to earth’s … Read more
Factors Temperate Tropical Latitude 300- 600 50- 300 Originating element Frontogenesis Temperature and Coriolis force Cloud Wide range of clouds associated Generally Clumonimbus Rainfall and life Rainfall is slow. It remain in life for many days. Rain is heavy but does not last beyond few hrs. Isobars Complete circle with steep gradient V shaped … Read more
The continental drift hypothesis was developed in the early part of the 20th century, mostly by Alfred Wegener. Wegener said that continents move around on Earth’s surface and that they were once joined together as a single supercontinent. While Wegener was alive, scientists did not believe that the continents could move. Alfred Wegener proposed that … Read more
Poultry is the rearing of domesticated fowl (chicken), ducks, geese, turkey and some varieties of pigeon for their meat and eggs. The specialized meat-producing poultry birds are called broilers while egg-laying poultry birds are called layers. The tremendous rise in the availability of poultry products is called Silver Revolution. Variety improvement is done by cross-breeding … Read more
Weathering, water, elevation, sinking, and erosion of the soil are constantly shaping the surface of the Earth. It doesn’t really happen overnight but takes hundreds and thousands of years for us to notice these changes. These are the natural processes that lead to various formations of the Landforms. Landforms originate from these geological processes. Landforms can be categorized into Mountains, Plateaus, and Plains depending … Read more
India covers 3,214 km from North land to South land and 2,933 km from eastwards to westwards. India has the land frontier of 15,106.7 km and a coastline of 7,516.6 km. Sri Lanka, Thailand, Pakistan, Bangladesh, Myanmar, Maldives, and Indonesia are the nations with which India accords marine borders. India is also surrounded in the … 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