I like to use a meter stick and be very intentional with my spacing to model time as a scale. I also avoid using the far right ... to sort events in the order they have happened. Show the geologic ...

Prehistoric time line, geologic time scale, photos, facts, maps, and more from National Geographic. Humans have walked the Earth for 190,000 years, a mere blip in Earth's 4.5-billion-year history.

Although those who study the branch of geology known as stratigraphy—the study of those strata and their resolution into Earth's vast geologic time scale—will continue to debate the idea of ...

As a period of geologic time, the boundaries of the Triassic are defined on the basis of rocks and the fossil record. It was the German geologist Friedrich August von Alberti who first marked the ...

According to the International Union of Geological Sciences (IUGS), the professional organization in charge of defining Earth’s time scale ... you start naming geologic-time terms, you need ...

We will provide a list of web sites with relevant information. The geologic time scale is divided into eons, eras, periods, epochs, and ages. Our activities, and the time scale for download above, ...