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Temperature variations in glacial regions
In glacial regions of the world or during forest fires the rocks are exposed to extreme temperatures. Since the conduction of heat is very slow, the temperatures at the surface and the interior of the rock are quite different thereby a kind of lateral stress is generated which may cause the peeling off of the external layers of the rock. This phenomenon is called as exfoliation and is accelerated by freezing of water trap ped inside the rock crevices and unloading i.e., the removal of overlying rocks or sediments causing the release of pressure.
Let us recall briefly what all we have learnt about fire hazards in this unit. Fire accident can happen due .to a number of reasons, like, flammable liquids, faulty electrical and
From the start of this course, we have emphasized the importance of research in shaping our understanding of human behavior and mental process. Several major studies and social psy
How do time and temperature work in soil formation? The time taken for the soil formation may be more in some cases or less in others. Hard rocks require more time as comp
Explain the Colour Blindness Normal individuals possess three cone pigments viz. red, green and blue which are referred to as tri-chromates. Colour blindness refers to the part
classes of aves
Controlling Air Pollution: Now let us see, how air pollution can be controlled. i) Photochemical smog-eliminating this would require large scale changes in life style
INTRODUCTION : You have studied about the hazards of electricity in Unit 11 of Block 3. You have learnt that most of the electrical accidents like shock, fire, etc. occur often du
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Explain Development of Agranulocytes Agranulocytes, we know, are the monocytes and lymphocytes. Agranulocytes develop in the bone marrow and thymus. They start as stem cells.
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