Modern Marvels: The Manhattan Project



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Modern Marvels: The Manhattan Project
1. The Manhattan Project cost a total of how many 1943 dollars?

2 million 2 billion 30 million 30 billion

2. The Manhattan project cost how much in today’s dollars?

2 million 2 billion 30 million 30 billion

3. The atomic bomb was tested _____ after scientists first started at Los Alamos.

28 months 36 months 60months

4. Many scientists immigrated to the United States from Europe in the 1930’s because:


  • Albert Einstein wrote them a letter.

  • President Roosevelt invited them.

  • They were Jewish and feared the Fascists.

  • They were recruited by American universities.

5. Nuclear fission is the:



  • Production of uranium.

  • Splitting of atoms by bombarding them with neutrons.

  • Splitting of protons by bombarding them with neutrons.

  • Result of neutrons smashing into each other.

6. During fission:



  • Mass is converted to potential energy.

  • Neutrons released by fission cause more fission.

  • Protons are released and cause more fission.

  • Uranium is produced.

7. In the late 1930’s scientists such as Leo Szilard feared the fact that:



  • German scientists had achieved fission.

  • German scientists had split the neutron.

  • German scientists were building uranium weapons.

  • German scientists would win the Nobel Prize.

8. A letter warning President Roosevelt of German uranium research was written by:


9. Italian physicist Enrico Fermi came to the United States with his wife:



  • As a spy for the Fascists.

  • From Denmark after a family holiday.

  • From Sweden after accepting the Nobel Prize.

  • On a ship from Italy.

10. The scientists who studied the feasibility of a sustained chain reaction were: (pick two)



  • Albert Einstein

  • Enrico Fermi

  • Leslie Groves

  • Leo Szilard

11. The first problem in developing the atomic bomb was:



  • Inadequate fuel production.

  • Keeping it a secret from the Germans.

  • Where it should be built.

  • Whether a chain reaction could be produced.

12. President Roosevelt approved the development of an atomic bomb:



  • At the urging of General Leslie Groves.

  • After receiving permission from the State of Tennessee to build Oak Ridge.

  • When Italy joined the Axis.

  • When America entered the war.

13. The first uranium reactor was located at:


14. The weapons grade fuel needed for the first atomic bomb was:

Hydrogen Uranium-235 Uranium-238 Uranium-571

15. The ratio of U-235 to U-238 is:

1:2 1:139 2:1 235:238

16. Separating U-235 from U-238 was a problem because:



  • A chain reaction would result.

  • They are chemically identical.

  • There was so much more U-235 than U-238

  • There was so much more U-238 than U-235.

17. The two methods of separating U-235 from U-238 were: (pick two)



  • Breeder reactors

  • Electromagnetic separation

  • Gaseous diffusion

  • Radionuclide splitting

18. The lead scientist at Los Alamos was:



  • Leslie Groves

  • David Lawrence

  • J. Robert Oppenheimer

  • Leo Szilard

19. By 1945 there were ____ lab personnel at Los Alamos.

250 1500 2500 3500

20. The facility that had to keep constantly expanding at Los Alamos was the:


  • Administrative offices.

  • Bachelor’s Quarters.

  • Officer’s Quarters.

  • Maternity Ward.

21. In the “gun design” atomic bomb:



  • The bomb is fired from a gun.

  • Implosions force a core mass together to cause fission.

  • One piece of uranium is fired into another at 3,000 feet/second.

  • Plutonium is used in place of U-235.

22. Plutonium is:



  • The heaviest naturally occurring element

  • More likely to undergo fission than U-235.

  • Harder to produce than U-235.

  • Produced in Oak Ridge, Tennessee.

23. Gaseous diffusion:



  • Uses a barrier to blend U-235 atoms into U-238 atoms.

  • Uses uranium hexafluoride gas as the source of uranium.

  • Uses very little energy.

  • Extracts U-235 from plutonium.

24. Oak Ridge was the _____ largest town in Tennessee by the end of the war.

2nd 3rd 4th 5th
25. The K-25 building used ___ of the electrical energy in the United States for gaseous diffusion.

2% 5% 10% 15%


26. The plutonium bomb begins a chain reaction by:

  • Compressing nuclei together.

  • Firing one piece of plutonium into another.

  • Forcing plutonium to combine with uranium.

  • Splitting neutrons

27. It was important for the plutonium bomb to work because: (pick two)



  • Harry Truman promised the British it would be used against Berlin.

  • There was only enough U-235 available for one gun bomb.

  • The Hanford site was more secure than the Oak Ridge site.

  • It would take more than one bomb to break the enemy’s will.

28. The Plutonium bomb was nicknamed:

“Little Boy” “Fat Man” “Pluto” “Tokyo Surprise”
29. The test of the implosion (plutonium) bomb at Los Alamos was called:


  • “End of the World”

  • “Day of The Devil”

  • “Satan’s Barbeque”

  • “Trinity”

30. Before the test there was speculation that the atomic bomb would:



  • Cause a huge crack in the earth’s surface.

  • Fall off the tower before it went off.

  • Give observers a great suntan.

  • Ignite the atmosphere and destroy the world.

31. The blast from the bomb exploding at Los Alamos was equal to ______ tons of TNT.

10,000 20,000 30,000 40,000

32. Many of the scientists in the Manhattan Project wanted the bomb:



  • First demonstrated over an uninhabited area.

  • Used immediately against Japanese military targets.

  • Used against Japanese civilian targets if Japan did not surrender.

  • Withheld for possible use against the Russians.

33. “Little Boy” caused what damage to Hiroshima? (pick two)



  • 90% of the city leveled.

  • 100 mile/hour winds

  • Force of 1200 tons of TNT

  • 130,000 killed by the blast and radiation sickness.



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