List any two causes for the failure of sustained availability of ground water.

(a) The air above land gets heated faster and being light, it starts rising up. As the air rises, a region of low pressure is created. As a result, the...

When the object moves upwards, the work done by gravity is negative (as the direction of gravitational force is towards the Earth’s center) and when the object come downwards, there...

The decomposition of detritus is due to activities of microorganisms.The rate of growth of microbes is affected by temperature.The pH of substratum affects the composition of microbes (acidophiles / basophiles)which...

The decomposition of detritus is due to activities of microorganisms. The rate of growth of microbes is affected by temperature. The pH of substratum affects the composition of microbes (acidophiles...

(c) A-horizon

Causes for pollution of water of river Ganga: (i) Duniping of untreated sewage (ii) Industrial Wastes Effects: (a) Growth of disease-causing microorganisms in the river water. (b) The river water becomes more acidic which makes...

Areas covered with concrete reduce the seepage of rain water into the ground and this reduces the availability of ground water.

(b) Under the Mahalwari system, revenue, settlement was to be made by village or estates with the landlords. In the Ryotwari system, a direct settlement was made between the government...

(c) First Anglo-Burmese War – Burmese defeated, Treaty of Yandobo (1826); First Anglo-Afghan War – Afghan defeated (1838); First Anglo-Maratha War – Britishers were defeated, Treaty of Salbai (1782); Second...

(a) A nuclear reactor is a device to initiate and control a sustained nuclear chain reaction. The most common use of nuclear reactors is for the generation of electrical power...