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Lesson overview:Which organisms lived during each era of time?

  • Which groups of organisms existed in each period
  • Which groups of organisms existed in each period
  • The reasons why some organisms became extinct
  • Which groups of organisms existed in each period
  • Which groups of organisms existed in each period
  • The reasons why some organisms became extinct

In this lesson, we will learn what the fossil record has taught us about the history of organisms that have existed on our planet. We will learn what a geologist is and what they can tell us about the organisms that have lived during each geological era of time. For this lesson you will need a piece of paper, a pencil and a ruler.