Describes the characteristics, size, and movement of icebergs, ice caps, and glaciers. Describes the characteristics, size, and movement of icebergs, ice caps, and glaciers. Large type and color illustrations are used to introduce these ice formation, with material on haw glaciers move and how pieces of ice caps become icebergs.
Provides information about the need for sleep and effects of its lack, sleepwalking, dreaming, animals which sleep and dream, nocturnal animals, and hibernation.
Describes the climate as well as plant, animal, and human life in the nearly treeless area spread across northern parts of Canada, Alaska, Europe, and Asia.