The term volcanic ash is also often loosely used to refer to all explosive eruption products (correctly referred to as tephra), including particles larger than 2mm.Volcanic ash is formed during explosive volcanic eruptions when dissolved gases in magma expand and escape violently into the atmosphere.he term volcanic ash is also often loosely used to refer to all explosive eruption products (correctly referred to as tephra), including particles larger than 2mm.
freezing point. (frÄ'zÄ­ng) The temperature at which a liquid, releasing sufficient heat, becomes a solid. For a given substance, the freezing point of its liquid form is the same as the melting point of its solid form, and depends on such factors as the purity of the substance and the surrounding pressure. The freezing point of water at a pressure of one atmosphere is 0Â°C (32Â°F); that of liquid nitrogen is -209.89Â°C (-345.8Â°F).
Keep in mind that people curiously think of boiling and freezing only in terms of water. There are lots of media that can boil and freeze at wildly different temperatures. Don't expect this get you a date, by the way... The boiling point of water is 212Â° F and 100Â° C at sea level. Side note, the Metric system's temperature unit is based around the boiling point of water with 0Â° C being the freezing point of water and 100Â° C the boiling point.