Physical changes
How physical changes happen.
Physical Change
"A physical change is a change in which no new substances are formed. Physical changes affect the form of a chemical substance, but not its chemical composition. Mixtures can be separated into their parts by physical methods, such as spinning in a centrifuge."
-Wikipedia
Examples of Physical Changes
Solid liquid and gas
These are different stages of water. This is a physical change.
Glass breaking
Glass breakingis a physical change. Glass is bieng broken apart but, is still the same thing.
Chopping wood
When chopping wood it changes size and shape, it is still wood. This is a physical change