Civil Service Exam Reviewer · Ordering of Sentences · hard

Arrange the following sentences to form a coherent paragraph, then choose the correct order: (1) At sunrise and sunset, however, sunlight travels through much more air before reaching us. (2) These molecules scatter short blue wavelengths much more strongly than longer red ones. (3) As a result, blue light reaches our eyes from every part of the sky. (4) By then most of the blue has been scattered away, leaving the reds and oranges we see. (5) When it enters the atmosphere, it collides with tiny gas molecules. (6) Sunlight appears white, but it is actually made up of many colors.

5-6-2-3-1-4
6-2-5-3-1-4
6-5-2-3-1-4
6-5-2-3-4-1

Answer

C. 6-5-2-3-1-4

Solution

The correct order is 6-5-2-3-1-4. Each sentence picks up an idea from the one before it: Sunlight appears white, but it is actually made up of many colors. When it enters the atmosphere, it collides with tiny gas molecules. These molecules scatter short blue wavelengths much more strongly than longer red ones. As a result, blue light reaches our eyes from every part of the sky. At sunrise and sunset, however, sunlight travels through much more air before reaching us. By then most of the blue has been scattered away, leaving the reds and oranges we see. Each wrong choice swaps just one pair of neighboring sentences, which breaks one of these links.

Answer

Solution

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