Writing and Balancing Chemical Equations — Cumulative exam
Question 33 • ISA CA-Chemistry A
The first known telescopes, used around 1600, consisted of a lens and an eyepiece. Today, telescopes are often computer controlled and consist of a complicated array of sophisticated lenses. Which statement correctly describes how telescopes have changed over time?
Answer
A
The telescopes of the 1600s were used until the year 2000, when a more sophisticated telescope was built.
B
The telescopes of the 1600s were gradually improved upon over time, resulting in the telescopes that are available today.
C
The telescopes of the 1600s were used until the year 1900, when a more sophisticated telescope was built that was used until the year 2000.
D
The telescopes of the 1600s were abandoned after about 50 years, and the technology was completely replaced.
Explanation
Telescopes developed through many gradual improvements in design and technology over time. The early telescopes were not simply used unchanged until a particular year, nor was their technology completely abandoned after 50 years. Therefore, the statement that early telescopes were gradually improved into the telescopes available today is correct: choice B.
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