Definition: an organism is an individual living thing.  Some kinds of organisms are plants, animals, bacteria, and fish. 

Photos:  Here are some different kinds of organisms:

  ALL OF THE DIFFERENT KINDS OF ANIMALS ARE ORGANISMS

  ALL OF THE DIFFERENT KINDS OF FUNGI ARE ORGANISMS

  ALL OF THE DIFFERENT KINDS OF PLANTS ARE ORGANISMS

   ALL OF THE DIFFERENT TYPES OF BACTERIA ARE ORGANISMS

YOU ARE ALSO AN ORGANISM!

Webpages:

Berkeley: Classification

Classifying Critters