| 51. | What is the system that uses radioactivity to determine the age of prehistoric materials called? |
A. radio dating | |
B. uranium dating | |
C. carbon dating | |
D. deuterium dating |
| 52. | the age of the earth is estimated |
A. from uranium dating | |
B. from carbon dating | |
C. from nuclear dating | |
D. from biological clock |
| 53. | What is determined by radio carbon dating |
A. soil | |
B. Memorial | |
C. fossil | |
D. rocks |
| 54. | Who first used the word ‘radioactivity’? |
A. Henri Becquerel | |
B. Marie Curie | |
C. rutherford | |
D. de broglie |
| 55. | Which particle is needed to continue the continuous process of fission of uranium? |
A. electron | |
B. Proton | |
C. neutrons | |
D. positron |
| 56. | who invented the atomic bomb |
A. madame curie | |
B. Pierre Curie | |
C. auto han | |
D. albert einstein |
| 57. | On what principle does a nuclear power plant work? |
A. Fragmentation | |
B. fusion | |
C. thermal combustion | |
D. effect of all three above |
| 58. | Which type of reaction produces the most harmful radiation? |
A. by fusion | |
B. by fragmentation | |
C. by chemical reaction | |
D. photochemical reaction |
| 59. | Which of the following is a source of solar energy |
A. nuclear fission | |
B. nuclear fusion | |
C. artificial radioactivity | |
D. X ray emission |
| 60. | Graphite is used in nuclear plants – |
A. like fuel | |
B. like a lubricant | |
C. like a suppressor | |
D. none of the above |