Environmental Science

Running head : Questions and Answers

Environmental Issues ' Questions and Answers

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May 6 , 2010

Environmental Issues ' Questions and Answers

Describe the path a molecule of water might follow through the hydrologic cycle from the ocean

Evaporation takes place and the water molecule is taken high up in the atmosphere , where temperatures are very low . Continued accumulation of the molecules of water saturates the air and hence rain clouds are formed though condensation process . Precipitation in the form of rainfall , snow then occurs . Where precipitation occurs depends

on whether or not the clouds were transported to land by advection process or remained in the ocean . The cycle is at this point complete and the process starts all over again

2 ) to land and back again

In the case where the clouds containing the water molecules are transported to land from the ocean by air currents through a process called advection , condensation as well as precipitation occurs over land . Some of the water on reaching the ground evaporates to the atmosphere while some penetrate to the ground to form underground water But the largest portion of the water goes back to the ocean in the form of surface run off through streams and rivers

3 ) Describe the least one example of the environmental costs of water diversion from river to farms or cities

Water pollution : On diversion to farms , the water is mainly used for irrigation purposes . Yet in these farms chemical fertilizers and pesticides are widely applied . The overflow...