Week1_Prompt#1

The difference between a physical and chemical change when acted on matter is first of all a physical change does not change the chemical properties of an object. Secondly physical change involves a change in the physical property such as state of matter size or color. For example when you take water in a bottle that is already formed as a liquid and turn that liquid into a solid by freezing it. Chemical changes happen very powerful but on a much smaller scale. Chemical changes also happen between molecules and the changes go unseen at first. Finally overtime you see the results of the chemical change just slowly progressing until you fully see it. For example The Statue of Liberty. The Statue of Liberty was first given to us as a copper statue of a woman that stands for freedom; then naturally over hundreds of years she becomes a greenish color. This is a cause of chemical change because the air molecules and other natural causes have combined to take away the statues copper color and give it a greenish color which is what we see now. To summarize all that I tried to say; I am simply saying physical changes can be made without changing the make of a substance while chemical changes do the opposite.



References:

http://www.usoe.k12.ut.us/curr/Science/sciber00/8th/matter/sciber/change.htm

http://www.chem4kids.com/files/matter_chempphys.html