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.
Describes the physical characteristics and life cycle of butterflies and identifies specific examples including the Monarch butterfly, Satyr butterfly, Swallowtail, and moth.
Defines the physical characteristics and uses of human and animal tongues, as well as other meanings of a word that can describe a language or part of a shoe.