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There are three ways heat is transferred into and through the atmosphere: radiation. conduction. convection.
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planform and cross-shore profile of the subaqueous beach, the subaerial beach and adjacent dune) will always tend to a state of dynamic equilibrium. If some parts are highly resistant to erosion (presence of hard outcrops or cliffs, for example), this can take a very long time. However, if the active coastal zone consists exclusively of loose sediments, a state of dynamic equilibrium can be reached in rather short periods, of the order of years or decades. The longer periods hold for beaches in the vicinity of coastal inlets. The beach state at equilibrium is not static, but fluctuates around the equilibrium state in response to fluctuations in hydrodynamic factors (tidal cycles, wave climate) and sediment supply.
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Temperatures in the lowlands of West Africa are high throughout the year, with annual means usually above 18°C. In the Sahel, maximum temperatures can reach above 40°C.
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All of us know that the earth is rotating continuously in its orbit. But we dont realize the rotation due to gravitational force. The earth rotates in its own axis this causes day and night . While rotating on its axis, earth also rotates around elliptical axis around the sun which causes the different regions to experience different seasons. The side facing the sun experience summer and other side experience winter.
Color hardness Streack clevage or fracture
