1) Radium and polonium were discovered by a) Alfred Nobel b) Marie Curie c) Alexander Bell 2) Dynamite was invented by a) Alexander Fleming b) Igor Sikorsky c) Alfred Nobel 3) Penicilin was discovered by a) Akexander Fleming b) Thomas Alva Edison c) James Watt 4) The telephone was invented by a) Marie Curie b) Thomas Alva Edison c) Alexander Bell 5) The light bulb was invented by a) Thomas Alva Edison b) Leonardo da Vinci c) James Watt 6) The steam engine was invented by a) Thomas Alva Edison b) James Watt c) Marie Curie 7) The helicopter was invented by a) Igor Sikorsky b) James Watt c) Leonardo da Vinci

8. razred - Inventors and inventions

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