Yes. Physical change is when you change the appearance but not the actual object. Crushing an aluminum can is a physical change because you have only changed its shape, but not its chemical composition.
solidify is an irreversible
chalk
irreversible
Yes it is reversible.
IRREVERSIBLE
Crushing a piece of chalk is only a physical change. Chemically, it is still chalk.
I would say it is a physical change the chalk is being reduced to a smaller size. It still remains chalk.
Yes. Physical change is when you change the appearance but not the actual object. Crushing an aluminum can is a physical change because you have only changed its shape, but not its chemical composition.
no
reversable
irreversible change.
solidify is an irreversible
irreversible
Irreversible.
irreversible change
chalk