This warming is in addition to carbon dioxide's better-known effect as a heat-trapping greenhouse gas. For scientists trying to predict global climate change in the coming century, the study underscores the importance of including plants in their climate models.
It is a physical change. All phase changes are physical, not chemical. The chemical composition of water does not change when it changes from a liquid to a gas, or for that ma â¦ tter, to a solid.
'Steam' is formed when water Vaporises at its boiling temperature. This is 100Â°C at standard atmospheric pressure (1.0atm). Water will also boil at higher and lower temperatures depending on the surrounding pressure. (Increased pressure, increases boiling point and decreased pressure decreases boiling point).