Geography

An eclipse of the Sun happens when the New Moon moves between the Sun and Earth, blocking out the Sun’s rays and casting a shadow on parts of Earth. The Moon’s shadow is not big enough to engulf the entire planet, so the shadow is always limited to a certain area (see map illustrations below). This area changes during … Read more

Groundwater contamination is the adulteration of water because of the increase in the concentration of certain pollutants. The major pollutants contributing to contamination are Arsenic, fluoride, Iron, uranium , nitrate etc. Causes of groundwater contamination are: Natural: Groundwater naturally contains high amount of pollutant due to geological formation. For example occurrence of fluoride is related … Read more

. The temperature of air at any place is influenced by : The latitude of the place; The altitude of the place; distance from the sea, the airmass circulation; The presence of warm and cold ocean currents; Local aspects.   The latitude The temperature of a place depends on the insolation received. It has been … Read more

Andes:  Longest continental mountain range in the world.  They are   found in South America. They formed due to ocean-continent collisions and subduction of oceanic crust beneath the south American plate. Mount Aconcagua is the highest peak.( 6962m) The rocky mountains:   They are fold mountains found in the western margi of the North American continent. They … Read more

A large section of Indian population lives in villages and is mainly engaged in agriculture. They belong to weaker section of the society. There is a definite trend of rural population migrating to the urban areas due to lack of employment opportunities, low earnings, insufficient means of transport and insanitary living conditions. The latter is … Read more

DRAW MAP Major Iron ore reserve are in : Odisha The ores are rich in haematites.India’s richest haematite deposits are located in Barabil-Koira valley.Others: Sundargarh, Mayurbhanj, Cuttack, Sambalpur, Keonjhar and Koraput districts. Jharkhand 25 per cent of reserves.First mine in Singhbhum district in 1904.Iron ore of here is of highest quality and will last for … Read more

Monsoon is that axis around which revolves the entire agricultural cycle of India. It is because about 64 per cent people of India depend on agriculture for their livelihood and agriculture itself is based on southwest monsoon. Except Himalayas all the parts of the country have temperature above the threashold level to grow the crops … Read more

An earthquake is the shaking or trembling of the earth’s surface, caused by the sudden movement of a part of the earth’s crust. The majority of earthquake occur at the point junction of major tectonic plates. The highly active regions are Pacific rim belt, Alpine belt , along oceanic ridges. The distribution is summarised as … Read more

Merits: Most of the canals provide perennial irrigation. This saves the crops from drought conditions and helps in increasing the farm production. Canals carry a lot of sediments brought down by the rivers. The sediments is deposited in the agriculture fields which adds to the fertility. Some of the canals are parts of multipurpose project … Read more

The atmosphere is made up of different types of gases, water vapors and dust particles. The composition of the atmosphere is not static. It changes according to the time and place.   Water vapor is unique in that its concentration varies from 0-4% of the atmosphere depending on where you are and what time of … Read more