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Question

Difficulty: HardIdentifying Explicit Details

The following passage is adapted from an essay detailing early bathysphere oceanographic explorations off the coast of Bermuda in the 1930s:

During their historical 1932 deep-sea descent, naturalist William Beebe and engineer Otis Barton recorded specific physiological and biological observations at distinct depths. At a depth of 400 feet below the surface, Beebe noted that red wavelengths of sunlight had completely vanished, leaving only a dim blue-green spectrum visible through the quartz windows. Continuing downward, at 800 feet, Barton recorded the total absence of any detectable sunlight, marking the boundary where absolute darkness enveloped the bathysphere. It was at a depth of 1,400 feet that the pair documented their first sighting of a pair of six-inch lanternfish equipped with rows of glowing photophores along their ventral surface. Finally, upon reaching 2,200 feet, Beebe reported seeing an unidentified large organism with twin rows of blue light along its flanks that flashed rhythmically twice before vanishing into the abyss.

Based explicitly on the depth markers provided in the passage, place the following oceanographic observations in order from the shallowest depth to the deepest depth at which they occurred.

  1. 1The complete disappearance of red wavelengths of sunlight
  2. 2The total absence of any detectable daylight surrounding the bathysphere
  3. 3The observation of six-inch lanternfish bearing ventral photophores
  4. 4The sighting of an unidentified large creature emitting double rhythmic flashes

Answer

The correct sequence from shallowest to deepest depth is: first, the disappearance of red sunlight (400 feet); second, the total absence of detectable daylight (800 feet); third, the observation of lanternfish with photophores (1,400 feet); and fourth, the sighting of the large creature emitting rhythmic flashes (2,200 feet).
The passage explicitly states four distinct depth markers for each event: red sunlight disappeared at 400 feet, total daylight extinction occurred at 800 feet, lanternfish were observed at 1,400 feet, and the rhythmic flashing creature was seen at 2,200 feet. Arranging these explicitly stated depths from smallest to largest yields the exact sequence.

Step-by-Step Solution

1
Locate explicit depth measurements in the passage for each described event.
Disappearance of red sunlight = 400 feet; Total darkness = 800 feet; Lanternfish sighting = 1,400 feet; Unidentified flashing creature = 2,200 feet.
Identifying explicitly stated numbers/depths is required to sequence the events accurately.
2
Arrange the identified depths in ascending order from shallowest to deepest.
400 feet < 800 feet < 1,400 feet < 2,200 feet.
The question specifically requests ordering from shallowest depth to deepest depth.
3
Match each depth back to its corresponding observation item.
Item 1 (400 ft) -> Item 2 (800 ft) -> Item 3 (1,400 ft) -> Item 4 (2,200 ft).
Ensures accurate ordering based strictly on literal passage details.

Key Concept

Literal Detail Recognition and Sequencing
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Topics

Identifying Explicit Details

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