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.
We've all seen a solid heated to a liquid and a liquid heated to a gas. Ice, for instance, melts to become liquid water, and liquid water can be boiled away as steam. However, under the right conditions of pressure and temperature something else can happen: the solid can turn directly into a gas.