Inventions and Discoveries

6. Who discovered the electron?
a) Ernest Rutherford
b) J.J. Thomson
c) Niels Bohr
d) Werner Heisenberg

7. Who invented the steam engine?
a) James Watt
b) George Stephenson
c) Richard Trevithick
d) Thomas Newcomen

8. Who discovered radioactivity?
a) Marie Curie
b) Albert Einstein
c) Ernest Rutherford
d) Niels Bohr

9. Who invented the airplane?
a) Orville and Wilbur Wright
b) Samuel Morse
c) Alexander Graham Bell
d) Thomas Edison

10. Who discovered the polio vaccine?
a) Louis Pasteur
b) Robert Koch
c) Albert Sabin
d) Jonas Salk