How do historians learn about the past?

Historians learn about the past from sources. Sources are a part of historical evidence. There are many types of sources, such as written and non-written. Written sources are obviously things that have writing such as Tombs, Songs, Speeches and posters etc.  Non- written are those that have no writing including Drawings, Bodies, Fossils, Artifacts and Cities.

After the Historians have found the source they must evaluate the sources, by Questioning the source and finding the time of origin. The questions that the historians ask are; Who was the writer, What kind of source is it, when was it produced and why was the source produced?
Time or origin means When it was created? My first thought was, " Oh their telling me to say 3000 B.C and prehistory. Brut no it is looking for the primary source and secondary source. Primary source is a sources that was created at the time of the event. Secondary source is a source created after the event.
One of the famous writers had written about the volcano eruption in pompei at the exact time he was writing as he was seeing it with his own eyes, this would be a example of a primary source.

The steps that historians must go through are

1st: GATHER a variety of sources
2nd: CATEGORIZE sources ( non- written, written)
3rd: EVALUATE sources ( asking questions, time of origin)
4th: INTERPRET sources (point of view)
5th: SHARE their findings(theories)