5. The history of life has an order too. |
Now let's make a similar timeline for some of the major events during the history of life on Earth.
Here are pictures of some fossils. Your goal is to put them into the correct order of when they first appeared on Earth.
Just click on the fossils in order, from the earliest to the most recent.
Ooops! Remember to start with the earliest event first!   Try again.
Great! You have created another timeline!
But how did we know the order this time?
In the U.S. history timeline, records were kept of the events as they happened; so it was easy to use this evidence and put them in order.
But with these events in the history of Earth, we don't have such a clear record of the order or the dates.... or do we?