Sometimes a source will be general (akin to saying World War 2 happened in the twentieth century), and sometimes it will have more specific information (it began in 1939). Challenge 1: Different sources or different pages in the textbook give more than one date for an event.Įxpect that this will happen. I prepared a handout to guide them through some additional challenges. I provided a sample timeline to give students an idea of what to do in different cases, and how to express uncertainty.Įven with those considerations handled, the students who used this exercise were looking up dates for themselves, and that added another layer of complexity. Events may occur in a geological instant, or take hundreds of millions of years. Some events have well-known dates, but some don’t. Plotting geological events on the forms can be tricky. So here you go, but you should probably know… The forms have divisions of the geological timescale along the bottom, and a numerical timescale across the top.Ĭlick here to download timeline forms.
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