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Grades 3–5 · History & Evidence

How does a timeline put events in order?

A timeline places events along a scale of time. Earlier dates come before later dates, and equal spaces represent equal amounts of time. This lets a timeline show both the order of events and the gaps between them.

H02 visual explanationFictional village records: bridge built in 1900, school opened in 1904, garden planted in 1909. The equal tick spacing represents one year per tick. Dates establish order but not causes.A fictional village timelineEach tick represents one yearBridge built1900School opens1904Garden planted19091900190519104 years from bridge to schoolTime order alone does not explain a cause.

In the diagramA fictional village timelineEach tick represents one yearBridge built1900School opens1904Garden planted1909190519104 years from bridge to schoolTime order alone does not explain a cause.

The fictional village events run from the 1900 bridge to the 1904 school and 1909 garden. Each tick represents one year.

In the fictional village, the bridge was built in 1900, the school opened in 1904 and the garden was planted in 1909. The scale gives one year to each tick. Four years passed from the bridge to the school because 1904 minus 1900 is four. The two named events mark the ends of that gap; counting the events does not measure the elapsed time.

A timeline organizes what happened when. It does not, by itself, explain why one event happened. The bridge coming before the school is a time relationship, not proof that building the bridge caused the school to open.

About this explanation

Starting knowledge: Read four-digit years in sequence and subtract small whole-number differences.

Sources

  • Library of Congress — U.S. History Primary Source Timeline
  • National Archives — Document Analysis
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