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Across 5. German reunification was the process in 1990 in which the German Democratic Republic became part of the Federal Republic of Germany to form the reunited nation of Germany. The end of the unification process is officially referred to as German unity, celebrated each year on 3 October as German Unity Day. 6. sea connected to the Atlantic Ocean, surrounded by the Mediterranean Basin and almost completely enclosed by land: on the north by Western and Southern Europe and Anatolia, on the south by North Africa, and on the east by the Levant 8. known as the Shoah, was the genocide of European Jews during World War II. Between 1941 and 1945, Nazi Germany and its collaborators systematically murdered some six million Jews across German-occupied Europe, around two-thirds of Europe's Jewish population 9. mountainous region that's most associated with the countries of Spain and Portugal. Its history under Muslim and Christian rule is reflected in landmarks like the Alhambra, an ornate Moorish palace in Granada, Spain, and the Sagrada Família, architect Antoni Gaudí's fantastical church in Barcelona. The capital of Spain's Catalonia region, Barcelona is also famous for imaginative food. 10. The Chernobyl disaster was a nuclear accident that occurred on Saturday 26 April 1986, at the No. 4 reactor in the Chernobyl Nuclear Power Plant, near the city of Pripyat in the north of the Ukrainian SSR in the Soviet Union 11. The Danube is the second-longest river in Europe, after the Volga in Russia 13. officially National Socialism, is the ideology and practices associated with Adolf Hitler and the Nazi Party in Nazi Germany. During Hitler's rise to power in 1930s Europe, it was frequently referred to as Hitlerism. 14. The European Union is a political and economic union of 27 member states that are located primarily in Europe. 21. The Treaty of Versailles was the most important of the peace treaties that brought World War I to an end. The Treaty ended the state of war between Germany and the Allied Powers 25. One of the major European rivers, and has its sources in Switzerland and flows in a mostly northerly direction through Germany and the Netherlands, emptying into the North Sea 26. simply the Urals, are a mountain range that runs approximately from north to south through western Russia, from the coast of the Arctic Ocean to the river Ural and northwestern Kazakhstan. The mountain range forms part of the conventional boundary between the regions of Europe and Asia 27. Judaism is an Abrahamic ethnic religion comprising the collective religious, cultural, and legal tradition and civilization of the Jewish people. Judaism is considered by religious Jews to be the expression of the covenant that God established with the Children of Israel.

Down 1. The Great Depression was a severe worldwide economic depression that took place mostly during the 1930s, beginning in the United States. The timing of the Great Depression varied across the world; in most countries, it started in 1929 and lasted until the late 1930s 2. Acid rain is a rain or any other form of precipitation that is unusually acidic, meaning that it has elevated levels of hydrogen ions. It can have harmful effects on plants, aquatic animals, and infrastructure 3. officially the Union of Soviet Socialist Republics, was a socialist state that spanned Europe and Asia during its existence from 1922 to 1991. It was nominally a federal union of multiple national republics; in practice its government and economy were highly centralized until its final years. 4. plain in Europe and is a major feature of one of four major topographical units of Europ 7. called simply the Channel, is an arm of the Atlantic Ocean that separates Southern England from northern France and links to the southern part of the North Sea by the Strait of Dover at its northeastern end. It is the busiest shipping area in the world. 12. Air pollution is the presence of substances in the atmosphere that are harmful to the health of humans and other living beings, or cause damage to the climate or to materials. There are many different types of air pollutants, such as gases, particulates, and biological molecules 15. First World War, often abbreviated as WWI or WW1, was a global war originating in Europe that lasted from 28 July 1914 to 11 November 1918. 16. made up of England, Scotland, Wales and Northern Ireland, is an island nation in northwestern Europe. England – birthplace of Shakespeare and The Beatles – is home to the capital, London, a globally influential centre of finance and culture. England is also site of Neolithic Stonehenge, Bath’s Roman spa and centuries-old universities at Oxford and Cambridge 17. Abrahamic monotheistic religion teaching that Muhammad is a messenger of God. It is the world's second-largest religion with 1.9 billion followers, or 24.9% of the world's population, known as Muslims. Muslims make up a majority of the population in 47 countries 18. Christianity is an Abrahamic, monotheistic religion based on the life and teachings of Jesus of Nazareth. It is the world's largest religion, with about 2.4 billion followers 19. a political theory derived from Karl Marx, advocating class war and leading to a society in which all property is publicly owned and each person works and is paid according to their abilities and needs 20. The Cold War was a period of geopolitical tension between the United States and the Soviet Union and their respective allies, the Western Bloc and the Eastern Bloc, which began following World War II 22. range separates the Iberian Peninsula from the rest of Europe, stretching more than 430km between Spain and France and rising higher than 3,400m in elevation. Hiking trails traverse the entire length of the range and national parks offer shorter trails, while dozens of ski resorts can be found on both sides of the Pyrenees. Andorra is a tiny sovereign state in the heart of the chain. 23. highest and most extensive mountain range system that lies entirely in Europe, stretching approximately 1,200 km across eight Alpine countries: France, Switzerland, Monaco, Italy, Liechtenstein, Austria, Germany, and Sloveni 24. Western European country with a landscape of forests, rivers, mountain ranges and North Sea beaches. It has over 2 millennia of history. Berlin, its capital, is home to art and nightlife scenes, the Brandenburg Gate and many sites relating to WWII. Munich is known for its Oktoberfest and beer halls, including the 16th-century Hofbräuhaus. Frankfurt, with its skyscrapers, houses the European Central Bank 25. Russian Federation, is a country spanning Eastern Europe and Northern Asia. It is the largest country in the world, covering over 17 million square kilometres, and encompassing more than one-eighth of Earth's inhabited land area.