cutting hair Chewing Gum breaking book
Examples of physical changes include melting of ice, boiling of water, cutting a piece of paper, breaking a glass, and dissolving salt in water. These changes alter the form or appearance of a substance without changing its chemical composition.
physical changes~ cutting of paper, parked car, melting butter, flat basketball, and broken glass. chemical changes~burning gas, reacting iron with sulfur, vaporizing water.
Physical Changes
what is marijuana physical changes
There are no physical changes. there are only chemical changes.
Reversible changes and physical changes are not exactly the same. Reversible changes can be undone and the original substance can be recovered, while physical changes alter the appearance or state of a substance without changing its chemical composition. Physical changes are usually reversible, but not all reversible changes are physical changes.
physical or chemical changes
Physical changes in a substance result in
Not all chemical changes are accompanied by a visible physical change. Most chemical changes however will be accompanied by a physical change.
its physical changes
Burning
Melting and boiling are physical changes.