Which are the durations of historical time?

• Short, Medium, Long

• Prehistory, Antiquity, Medieval, Modernity, Contemporary

• Cronological

We say that History is a contextual sciencie because

What is the reason of the Cronological time?

Calendars, days, weeks, months and years

• To divide time

• To ubicate ourselfs in time and space

• To delimit time

Is Historical time lineal?

• Yes, because it counts the progression of the society.

• No, because Historical time is a spiral, and a society can always go back to the "start"

Historical sources are

Which are the different primary sources that exists?

Which are the other different sources?

Which are the Secondary sources?