Examines the physical features, processes, and many different species of plants and animals that make up the ecosystem of Alaska's North Slope.

Examines the arctic tundra, its life and ecosystems, and its responses to temperature and weather.

Describes the formation of a vernal lake in Alaska's Denali National Park and the various creatures that make their homes in and around it.

Describes a river in Alaska and the life that it supports, emphasizing how the living things around it are connected and dependent upon it for th