Here's my take on the passage
I did not really sense a scale as it seemed like the passage was more so to explain (not even argue?- i think) the process of a scientific discovery (nuclear fission) . But the closest contrast I had is a really skewed scale of "Scientific Understanding is built directly vs Not Built Discovery" where there seems to be really little (if any) support for the former side. I did not write out a scale because it seemed too skewed on the passage
Passage Map
P1: Discussion of the path to discovery in science and presents an example to show this
P2: Theoretical backdrop knowledge in the field and what scientists thought
P3: Describes the process of discovery ; new discovery was made where barium was produced from bombardment
P4 : Meitner synthesis the discovery of barium with paragraph 2's theoretical consideration .
It seems like overall the paragraphs relate to each other temporally on the process of discovering nuclear fission. But on first read the jump between P1 and P2 was unclear and i did not see the overall structure till the really end and somewhat deduced this must all be the temporal process of discovery but this was not entirely clear until I did some of the questions too