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.
In a physical change a new substance is not created. In a chemical change a new substance is created. This applies to changes in states of matter. For example, ice, waterâ¦, and steam are all the same substance, even though they exist in three different states. The elements of which they are comprised do not change.