Answer:
The word in the passage that should be followed by a colon is 'data'.
The word in the passage that should be followed by a semi-colon is 'Mars'.
Explanation:
A colon is commonly used to introduce a series of lists, things or statements and a semicolon is used to separate two or more independent clauses while showing a relationship among the clauses.
The word in the passage that should be followed by a colon is 'data'.
The word in the passage that should be followed by a semi-colon is 'Mars'.
The passage should be written in this way:
In December of 1988, NASA successfully launched the Mars Climate Orbiter. It was designed to get detailed information about Mars; and its weather conditions. According to plan, it would record the following data: atmospheric temperatures, dust levels, water vapour levels, and cloud cover.
