You got a cavity in a tooth: Physical
This process is a physical change because the chemical composition of the tooth structure remains the same, but its physical shape or structure is altered.
The gravy in the refrigerator turned jelly-like as it cooled: Physical
This is because the change in state of the gravy, from liquid to solid, is a physical change that does not alter the chemical composition of the gravy.
The sugar in the coffee dissolved: Physical
This is because the sugar molecules are not chemically altered during the process of dissolving in the coffee.
The red meat turned brown as it cooked: Chemical
This is because the heat from cooking causes a chemical reaction between the proteins and the oxygen in the air, resulting in a change in the chemical composition of the meat.
My room was white and I painted it a bright red color: Physical
This is because the paint and the wall remain chemically the same after painting, but only the physical appearance of the wall changes.
I sharpened my pencil before I started taking my test: Physical
This is because the process of sharpening only alters the physical shape of the pencil tip, but does not change the chemical composition of the pencil.
We made popsicles to bring to the picnic: Physical
The process of mixing the ingredients such as juice or fruit with sugar and water, and then pouring the mixture into popsicle molds, is a physical change because the chemical composition of the individual ingredients does not change.