| 1968 | Science & Nature | Multiple Choice | Easy | The asteroid belt is located between which two planets? |
| 1969 | Science & Nature | Multiple Choice | Hard | A comet's gaseous envelope (which creates the tail) is called what? |
| 1970 | Science & Nature | Multiple Choice | Easy | Human cells typically have how many copies of each gene? |
| 1971 | Entertainment: Television | Multiple Choice | Easy | In the Star Trek universe, what color is Vulcan blood? |