1) The theory of relativity was developed by  a) Isaac Newton b) Albert Einstein 2) The first step on the Moon was taken by  a) Neil Armstrong b) Yuri Gagarin 3) The first bicycle was built in a) 1839 b) 1920 4) The radioactive elements radium and polonium were discovered by a) Marie Curie b) William Rontgen 5) Television was invented in a) 1930 b) 1926 6) The steam engine was constructed by a) James Watt b) George Stephensen 7) Hot baths and central heating were first used by a) the Greeks b) the Romans 8) The first rocket was launched by a) Robert Goddard in 1926 b) Enrico Fermi in 1932

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