A combination of varying pressure and/or temperature.
Its the change of one substance into another substance.
Chemical change
chemical change is the change of one substance into another substance.
a physical change
compound
a physical change will only alter the appearance but will NOT change the substance to another substance =)
reaction Chemical change.
Two effects that are caused by a chemical change are changes from one substance into another. Another effect that can be caused by a chemical change is a change in the temperature of the surrounding system and substance, or a change in color of the substance.
Chemical change forms a new substance from another substance.
change of state
This is called a physical change.
The conversion of one substance to another substance is a chemical change, which happens as a result of a chemical reaction.