<P> The book De Mundo (composed before 250 BC or between 350 and 200 BC) described; Dew is moisture minute in composition falling from a clear sky; ice is water congealed in a condensed form from a clear sky; hoar - frost is congealed dew, and' dew - frost' is dew which is half congealed . </P> <P> In Greek mythology, Ersa is the goddess of dew . </P> <P> Dew, known in Hebrew as טל (tal), is significant in the Jewish religion for agricultural and theological purposes . On the first day of Passover, the Chazan, dressed in a white kittel, leads a service in which he prays for dew between that point and Sukkot . During the rainy season between December and Passover there are also additions in the Amidah for blessed dew to come together with rain . There are many midrashim that refer to dew as being the tool for ultimate resurrection . </P> <P> In the Biblical Old Testament dew is used symbolically in Deuteronomy 32: 2: "My doctrine shall drop as the rain, my speech shall distill as the dew, as the small rain upon the tender herb, and as the showers upon the grass ." </P>

Factors that influence the formation of dew and frost