By, Nicholas Auriemma
Definition of a physical change.
A physical change is a change in which no new substances are formed. Physical changes affect form of a chemical substance, but not its chemical composition. Mixtures can be separated into their parts by physical methods, such as spinning in a centrifuge.
The ice cube in this photo is physically being changed due to it slowly melting.
The marshmallow in this photo is physically being changed due to it being burned slowly.
The cake in this photo is physically being changed due to a person taking a slice out of it.
Examples of physical changes
In the three pictures above each show what a physical change is. In the first picture is the one of the ice cube which shows a physical change. One way the ice cube shows a physical change is that it is first at a whole a solid which now over time is starting to melt down into a liquid which is why that first example is an example of a physical change. In the middle picture it also shows an example of a physical change. One reason why it shows an example of a physical change is that it starts off as a regular marshmallow now it has patches of it being burnt due to it being physicaly being changed. Finally the last picture all the way to the right also shows a physical change. It shows this physical change because it starts off as a normal whole cake. Then a physical change happend the cake had a piece missing from the cake since it was sliced out so that was a physical change too. So this is the three examples of a physical change and how it was a physical change.