Which three political blocks the world was divided into between world war ii and 1991?
free-world bloc
european bloc
communist bloc
democratic bloc
third world bloc

Mosses, lichens and shrubs can be found where in russia? a.grasslands b.mountain regions c.coastal plains d.siberian tundra

Who developed the theory of plate tectonics?

Which phrases describe oxygen's roles in earth’s atmosphere? check all that apply. allows fuels to burn forms clouds that produce rain is the gas that animals breathe is used by plants to produce food forms ozone that absorbs the sun's harmful rays