Chemical phenomenon and State of matter

Chemical phenomenon noun - Any natural phenomenon involving chemistry (as changes to atoms or molecules).

State of matter and chemical phenomenon are semantically related. In some cases you can replace phrase "State of matter" with "Chemical phenomenon", this phrases are similar.

State of matter noun - Chemistry) the three traditional states of matter are solids (fixed shape and volume) and liquids (fixed volume and shaped by the container) and gases (filling the container.

Chemical phenomenon and state of matter are semantically related. You can use "Chemical phenomenon" instead a noun phrase "State of matter".