Noun. 1. continental divide-the watershed of a continent (especially the watershed of North America formed by a series of mountain ridges extending from Alaska to Mexico). water parting, watershed, divide-a ridge of land that separates two adjacent river systems.. a divide separating river systems that flow to opposite sides of a continent. 2. (caps. ) Also called Great Divide. the watershed in North America formed by the Rocky Mountains, separating streams flowing west from those flowing east.
life science. Any of several branches of science, such as biology, medicine, or ecology, that studies living organisms and their organization, life processes, and relationships to each other and their environment.. Any of several branches of science, such as microbiology, zoology, botany, or ecology, that deal with living organisms and their organization, life processes, and relationships to each other and their environment. Also called bioscience.
Natural Sciences (NST) is a branch of science concerned with the description, prediction, and understanding of natural phenomena, based on observational and empirical evidence. Social science is a major category of academic disciplines, concerned with society and the relationships among individuals within a society. Basically Natural Sciences deals with organic and inorganic things and social science deal with relationships among individuals in the society, organization or group.