This 17 slide LIVING THINGS powerpoint and 4 puzzle worksheet set covers the fundamental concepts and principles that underlie the National Life Science Standards for grades K - 4. It includes fill in, crossword, matching and word search. It is applicable to the characteristics of organisms, the life cycles of organisms, and organisms and environments, behavior, plants, herbivores, omnivores, animals, carnivores, genetics, adaptation, humans, migration, structures, extinction, biology, and ecology. Keys are included. Read only powerpoint.