1) Radium and polonium were discovered by a) Marie Sklodowska Curie. b) Lavoslav Ružička. c) Dmitrij Ivanovič Mendeljejev. 2) Dynamite was invented by a) Alexander Fleming. b) Alfred Nobel. c) Alexander Bell. 3) Penicilin was discovered by a) Louis Pasteur. b) Charles Darwin. c) Alexander Fleming. 4) The telephone was invented by a) Thomas Alva Edison. b) Alexander Graham Bell. c) Igor Sikorsky. 5) The light bulb was invented by  a) Thomas Alva Edison. b) Albert Einstein. c) Pierre Curie. 6) The steam engine was invented by a) George Stephenson. b) Ruđer Bošković. c) James Watt. 7) The first known helicopter sketches were drawn by  a) Leonardo da Vinci. b) Michelangelo Buonarroti. c) Orville and Wilbur Wright. 8) The first successful helicopter was designed by  a) Orville and Wilbur Wright. b) Igor Sikorsky. c) Igor Stravinski. 9) Alternating current was invented by a) Nikola Tesla. b) Thomas Alva Edison. c) J.Robert Oppenheimer. 10) The power of steam was first used in  a) Ancient Rome. b) Ancient Greece. c) Ancient Egypt.

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