This document discusses different types of biomes, which are classified based on geographic location, climate conditions, and similar populations of plants and animals. It identifies two main categories of biomes - terrestrial biomes, which make up 1/3 of the Earth's surface, and aquatic biomes, which cover 2/3. Within terrestrial biomes, it lists and diagrams various types including tundra, savanna, desert, tropical rainforest, temperate grasslands and forests, and taiga.