Audience: Students; Grades: 6-8; Subject: Science. (2003) Explores the characteristics of the Earth's biosphere by looking at ecosystems and biomes. Discusses the abiotic and biotic components of ecosystems and explains how ecosystems can change over time through the process of ecological succession. Looks at some of the different terrestrial biomes found on Earth, including the tundra, taiga, forest, grassland, and desert biomes. Also looks at aquatic biomes, including the marine and freshwater biomes. Program concludes with a 10-question video quiz. For the teacher's guide go to: https://drive.google.com/folderview?id=0B9ZT7PYcIjLfM0toUHJnUjduS3M&usp=sharing