It doesn't matter if something is reversible or irreversible. it will not depend if it is a chemical or physical change. A physical change is when the composition of a substance remains unaltered (the particles stay the same) and no new substance is produced. Such as when you make a paper plane out of paper, the appearance changed, the particles stayed the same, no new substance was created, and the paper remains paper. A chemical change is when the composition of a substance is altered and a new substance is produced. Such as when paper is burned, the new substance produced is the carbon and other gases from the fire, and the composition of the paper changes, slowly disappearing.
It usually is unless you draw so rapidly that the heat of the friction heats the paper and causes it to smoke.
Using chalk on a piece of paper is a physical change.
Some chalk particles have been physically moved but they are still chalk.
Chalk grinding is a physical change.
The chalk has physically changed size, but it is still chalk.
Writing with chalk is a physical change.
Yes, it is a physical change.
lol
yes it is
physical
Physical change
Drawing on a Pierce of paper
Breaking, grinding, cracking are all examples of a physical change. The nature of the substance has not changed, just the size of the pieces has changed.
Cooking involve many chemical processes but also some physical processes as evaporation or melting.
Breaking, grinding, cracking are all examples of a physical change. The nature of the substance has not changed, just the size of the pieces has changed.
Physical change of the paint, not the door.
this is a physical change
Grinding chalk really doesn't change the chalk except to make it into powder. So that makes it a physical change. It is much like ice melting into water.
A physical change.
Grinding chalk to chalk dust is a physical change because the texture and size may change but the its molecules are still the same.An example of chemical change is burning paper because ash is chemically different from paper.
grinding is a physical change
Grinding sulfur is a physical change.
Crushing a piece of chalk is only a physical change. Chemically, it is still chalk.
grinding any substance would by a physical change, because they are still that object
It is a physical change.
yes grinding pepper is a phisical change
Grinding is a physical process.
physical :)
Physical change.