Minerals can be described by various physical properties which relate to their chemical structure and composition. Common distinguishing characteristics include crystal structure and habit, hardness, lustre, diaphaneity, colour, streak, tenacity, cleavage, fracture, parting, and specific gravity. More specific tests for minerals include magnetism, taste or smell, radioactivity and reaction to acid.
The revolutions of 1848â49 in the German states, the opening phase of which was also called the March Revolution (German: Maerzrevolution), mÃ¤rzrevolution were initially part of The revolutions of 1848 that broke out in Many european. countrieshe revolutions spread across Europe; they erupted in Austria and Germany, beginning with the large demonstrations on March 13, 1848, in Vienna. This resulted in the resignation of Prince von Metternich as chief minister to Emperor Ferdinand I of Austria, and his going into exile in Britain.
The Revolutions of 1989 were part of a revolutionary wave that resulted in the Fall of Communism in the Communist states of Central and Eastern Europe and beyond. The period is sometimes called the Autumn of Nations, a play on the term Springtime of Nations sometimes used to describe the Revolutions of 1848.The events began in Poland in 1989, and continued in Hungary, East Germany, Bulgaria, Czechoslovakia, and Romania.he period is sometimes called the Autumn of Nations, a play on the term Springtime of Nations sometimes used to describe the Revolutions of 1848. The events began in Poland in 1989, and continued in Hungary, East Germany, Bulgaria, Czechoslovakia, and Romania.