Most states break their crimes into two major groups: felonies and misdemeanors. Whether a crime falls into one category or the other depends on the potential punishment. If a law provides for imprisonment for longer than a year, it is usually considered a felony. If the potential punishment is for a year or less, then the crime is considered a misdemeanor.
In some states, certain crimes are known as "wobblers," which means that the prosecutor may charge the crime as either a misdemeanor or a felony.
Behaviors punishable only by fine are usually not considered crimes at all, but infractions -- for example, traffic tickets. But legislatures sometimes label a behavior punishable only by fine as a misdemeanor -- such as possession of less than an ounce of marijuana for personal use in California. To learn more about the different levels of crimes, see Nolo's article Felonies, Misdemeanors, and Infractions: Classifying Crimes.
Proof & Defenses in Criminal Cases
Getting a Lawyer for your Criminal Case
Steps in a Criminal Defense Case
Arraignment: Your First Court Appearance
Plea Bargains (Deals) in a Criminal Case
Legal Elements of Common Crimes
Expungement & Criminal Records
Should I just plead guilty and avoid a trial?
Is the public defender a real lawyer?
Can I change defense lawyers after I've hired one?
How long after arrest do I find out what the charges are?
Does it matter whether a suspect is given the Miranda warning?