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 are a scientific branch that deals with observations, understanding and predictions of natural phenomena. It is a diverse field and includes disciplines such as biological science, physics, chemistry, Earth science and astronomy. Europe is the sixth largest continent and includes 47 countries and assorted dependencies, islands and territories. It is bordered by the Mediterranean Sea to the south, Asia to the east, and the Atlantic Ocean to the West.