This editable powerpoint introduces students to the concept of geologic time and how species have evolved throughout Earth's history. Students will get an overview of precambrian time, the paleozoic, mesozoic, and cenozoic eras. Following the lesson they will learn about Earth's mass extinctions by visiting a website and filling out a data table about each of the previous 5 extinctions.

Included in your purchase:

- 17 slide powerpoint on geologic time (editable)

- 3 page student guided notes (not editable)

- 1 page worksheet to accompany online mass extinction interactive (editable)