Multiple choice

Directions: The sentences given in the following question, when properly sequenced, form a coherent paragraph. Each sentence is labelled with a letter. The first and last sentences of the paragraph are given and are labelled (S1) and (S2). Choose the most logical order of sentences from among the given choices to construct a coherent paragraph.

(S1) Pluto was first discovered in 1930 by Clyde W. Tombaugh at the Lowell Observatory in Flagstaff Arizona. (P) Only 22 at the time, Tombaugh was given the laborious task of comparing photographic plates. (Q) Any moving object, like an asteroid, comet or planet, would appear to jump from one photograph to the next. (R) Astronomers had long predicted that there would be a ninth planet in the Solar System, which they called Planet X. (S) These were two images of a region of the sky, taken two weeks apart. (S2) After a year of observations, Tombaugh finally discovered an object in the right orbit, and declared that he had discovered Planet X.

  1. PQRS

  2. RPSQ

  3. QPSR

  4. SQPR

  5. .
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

S1 introduces the topic of Pluto. R expands upon the history of Pluto's existence as a prediction. P tells us about the role Tombaugh played in its discovery. S tells us about the images mentioned in P. Q follows S and tells us exactly what Tombaugh had to spot in these photographs. S2 mentions exactly what Tombaugh finds in the photographs. Thus, this is the correct answer.

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