Plate tectonics is the theory that explains how Earth's land masses are in constant motion. Before this theory was discovered, Alfred Wegener found out about the continental drift. Its the hypothesis of how the continents drifted over the ocean bed.
The continental drift led to the theory of plate tectonics. The main reason that led to the movement of the continents is because of the movement of the plates in the lithosphere.
Plates are massive, irregularly shaped slabs of solid rock, generally composed of both continental and oceanic lithosphere.
The intense heat in the Earth's core make the plates to move.
Humans can be affected by volcanic events, sea level rise, and earthquakes, all of which are related to plate tectonics.
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Explanation:
Veterans day is the celebrated to honour the bravery and sacrifice of all US veterans. It is celebrated on Nov 11. Earlier it was known as armistice day and was declared as a holiday fro honouring the end of world war one on November 11,1918. It is a federal holiday in US, and hence government agencies and schools are closed on that day. Various other countries celebrate it as the Armistice day.
<em>It was on November 11, 1918 that armistice was signed and world war one came to an end. Next year Woodrow Wilson declared to call Nov 11 as Armistice day. It was changed to Veterans Day in 1954 to honour the veterans of Korean war and second world war. </em>
It was president Dwight D Eisenhower who officially proclaimed to celebrate the Veterans day and changed Armistice Day to Veterans Day, it was done in year 1954.
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Answer: Lexington and Concord, Declaration of Independence, Articles of Confederation, U.S Constitution.
