This 7th grade science chapter discusses classifying and identifying different forms of life on Earth and beyond. It questions whether life exists elsewhere in the universe and how to determine if unfamiliar organisms originated on Earth. It also examines how all living things on the planet are related and how animals have found sustenance for millions of years of evolution.

1. 7th Grade Science
Chapter 1 : Classifying Life

2. Are aliens out there ?
(Exobiology)

3. Is this thing from earth ?
(Waterbear bug)

4. What are the alive things on
earth ?

7. How is it possible that animals
had enough food for millions of
years ?

8. Are living things related ?