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.
Physical changes, those changes that do not involve chemical changes or nuclear changes, can be reversed, though doing so may be difficult in some cases. To cite a single examâ¦ple, water can be frozen and then thawed. Or it can be boiled off and then condensed.