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The Causes of Rainfall Precipitation can be defined in many different ways. One can define it as any aqueous deposit in liquid or solid form that develops in a saturated atmosphere and falls to the ground generally from clouds. A saturated atmosphere is any atmosphere where the relative humidity equals 100%. However this definition includes sleet, hail, dew, fog, rain and snow. Therefore there is a requirement for further investigation into the causes of rainfall and the processes involved in it. There are many key parts to the theory of how precipitation occurs and the processes involved all relate to the hydrological cycle. Evaporation is first the process where water is heated from the surface of the earth and rises in a gaseous form of water vapour until it reaches the sufficient height and temperature for condensation to occur. Condensation is the change of water from its gaseous form of...

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