Article: The British recognised the need for anti-aircraft capability a few weeks before World War I broke out; on 8 July 1914, the New York Times reported that the British government had decided to 'dot the coasts of the British Isles with a series of towers, each armed with two quick-firing guns of special design,' while 'a complete circle of towers' was to be built around 'naval installations' and 'at other especially vulnerable points.' By December 1914 the Royal Naval Volunteer Reserve (RNVR) was manning AA guns and searchlights assembled from various sources at some nine ports. The Royal Garrison Artillery (RGA) was given responsibility for AA defence in the field, using motorised two-gun sections. The first were formally formed in November 1914. Initially they used QF 1-pounder "pom-pom" (a 37 mm version of the Maxim Gun).

Question: Who used motorised two-gun sections?
Ans: Royal Garrison Artillery (RGA)


Article: Many regions in Russia were affected by the Soviet famine of 1932–1933: Volga; Central Black Soil Region; North Caucasus; the Urals; the Crimea; part of Western Siberia; and the Kazak ASSR. With the adoption of the 1936 Soviet Constitution on December 5, 1936, the size of the RSFSR was significantly reduced. The Kazakh ASSR and Kirghiz ASSR were transformed into the Kazakh and Kirghiz Soviet Socialist Republics. The Karakalpak Autonomous Socialist Soviet Republic was transferred to the Uzbek SSR.

Question: What effect did the 1936 Soviet Constitution have on the size of the Russia?
Ans: reduced


Article: Iron is usually found as iron ore on Earth, except for one deposit of native iron in Greenland, which was used by the Inuit people. Native copper, however, was found worldwide, along with silver, gold and platinum, which were also used to make tools, jewelry, and other objects since Neolithic times. Copper was the hardest of these metals, and the most widely distributed. It became one of the most important metals to the ancients. Eventually, humans learned to smelt metals such as copper and tin from ore, and, around 2500 BC, began alloying the two metals to form bronze, which is much harder than its ingredients. Tin was rare, however, being found mostly in Great Britain. In the Middle East, people began alloying copper with zinc to form brass. Ancient civilizations took into account the mixture and the various properties it produced, such as hardness, toughness and melting point, under various conditions of temperature and work hardening, developing much of the information contained in modern alloy phase diagrams. Arrowheads from the Chinese Qin dynasty (around 200 BC) were often constructed with a hard bronze-head, but a softer bronze-tang, combining the alloys to prevent both dulling and breaking during use.

Question: What does copper and zinc form to make?
Ans: brass


Article: A similar situation occurs with waders (called shorebirds in North America). Many species, such as dunlin Calidris alpina and western sandpiper Calidris mauri, undertake long movements from their Arctic breeding grounds to warmer locations in the same hemisphere, but others such as semipalmated sandpiper C. pusilla travel longer distances to the tropics in the Southern Hemisphere.

Question: Where do dunlin Calidris alpina migrate to?
Ans:
warmer locations in the same hemisphere