Science is a systematic enterprise that builds and organizes knowledge in the form of testable explanations and predictions about the universe. In an older and closely related meaning (found, for example, in Aristotle), "science" refers to the body of reliable knowledge itself, of the type that can be logically and rationally explained.
Physical Change Examples
Ironically, change is the only thing that is permanent in this world. Types of changes are many and they can be classified according to many different criteria...
Chemistry > Organic Chemistry