Happening/taking place.
Debriefing.
The past tense of the word "occur" is "occurred."
A full moon has just occurred. That never occurred to me.
Chron means time. A chronometer is an instrument for measuring time.
Not necessarily. In that the word means "by chance or by accident," I suppose it could describe a robbery that occurred by that means, HOWEVER, in common usage the word "fortuitous" is usually associated with GOOD things happening to someone.
Petrification means turning into stone, like a fossil.Petrification changed the bone into a fossil.Over time, petrification occurred.
Ex post facto laws are unconstitutional. Those are laws that proscribe a behavior or act after it has been commenced or occurred.
The word sensing can mean a few things depending on how it is used. It means being aware of things around you through ones senses or perception of something that has occurred.
occur
Yes.
occurred
Happened.