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.
At the end of the First World War, Germany became a democratic republic known as the Weimar Republic. The government was unable to deal with the economic crisis left by the war.In 1923, France occupied the Ruhr Valley, the heartland of German industry, because Germany was unable to pay war reparations demanded by the Treaty of Versailles.owever, Germany in the 1920s remained politically and economically unstable. The Weimar democracy could not withstand the disastrous Great Depression of 1929. The disaster began in the United States of America, the leading economy in the world.