1. All things can be changed in two ways: chemically and physically. Both chemical and physical changes affect the state of matter. Physical changes are those that do not change the identity of the matter. For instance, clay will bend if squeezed. Still it will be a clay. Change in shape is a physical change. It does not change the matter's identity. Chemical changes turn the matter into a new kind of matter with different properties. For instance, when paper is burnt, it becomes ash. It will never be paper again. The difference between them is that physical changes are temporary. While chemical changes are permanent. Physical and chemical changes both affect the state of matter. Purpose Structure 2. When I got home from school after a long boring day, I took out the peanut butter, jelly, and bread. After taking the lid off of the jars, I spread the peanut butter on one side of the bread and the jelly on the other, and then I put the two pieces of bread together. After that, I enjoyed it while watching "NETFLIX" on the TV. I swear, that was the best peanut butter and jelly sandwich I ever ate. Structure Purpose