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.
During World War I, the German Empire was defeated by the Allied Powers, one of which was the United States. The U.S. government declared war on Germany on April 6, 1917. At the end of the war in November 1918, the German monarchy was overthrown and Germany was established as a republic.he main reason for the conclusion of that treaty was the fact that the U.S. Senate did not ratify the multilateral peace treaty signed in Versailles, thus leading to a separate peace treaty. Ratifications were exchanged in Berlin on November 11, 1921, and the treaty became effective on the same day.