Realizing the importance and fragility of the world's ecosystems is critical for today's students. Acid rain, global warming, the endangerment and extinction of a variety of plants and animals are real threats to our very survival. Our unit takes a close look at the different habitats that make up the world's ecosystems, and the components of these habitats that make them unique. Our unit also examines aspects such as the adaptation of plants and animals to change, and the infringement of civilization. It is hoped that students will not only gain a better understanding of the world they live in, but may also be more concerned with protecting the fragile environment of which we are all a part of. This Animal Science lesson provides a teacher and student section with a variety of reading passages, activities, crossword, word search, and answer key to create a well-rounded lesson plan.