Lesson summary for...

Crocs, Then and Now

Author/Source: National Geographic
Overview:This lesson has students investigate the geographical distributions, habitats, and other features of modern crocodilians and SuperCroc. Students consider what can be learned about one species by studying the other.
Concepts:This lesson covers the following concepts:
  • There is a fit between organisms and their environments, though not always a perfect fit.
  • Not every feature of an organism is an adaptation, but features often reflect their evolutionary history.
  • All organisms, including humans, retain evidence of their evolutionary history.
  • Fossils provide evidence of past life.
  • There are similarities and differences among fossils and living organisms.
  • Anatomical similarities of living things reflect common ancestry.
  • Scientists use anatomical features to infer the relatedness of taxa.
Grade Level:6-8
Time:Three hours
Teacher Background:Explore these links for additional information on the topics covered in this lesson: