The water cycle represented in six phases: evaporation of water from seas and oceans, wet soils and vegetation, due to the effect of solar radiation; condensation of evaporated water in the form of clouds in the sky; cooling and precipitation of condensed water on land in the form of rain, snow or hail; runoff of precipitated water by rivers and streams; infiltration of precipitated water into the ground and appearance of underground currents; return of continental water to the sea.