ZA

Zinnia AroraAIR 6· 2028

Question 6GS1GS1

How are ocean trenches formed? Describe the significant characteristics of these oceanic relief formations. (Answer in 150 words)

Open scan (p.17)
AnswerStrengthsGapsKeywords

Main Body

Ocean trenches are baseline features which resemble steep valleys on the continental shelf's base.

Formation:

1Due to increased weathering owing to silt-sticking from continental slope seismic activation.
2Also formed due to subduction of ridge formation. [Diagram showing continental shelf, continental slope, oceanic trench]

Significant features:

1Formed at convergent boundaries of plate [tag] Nazca plate - North American plate form Nazca trench near North-East Canada/Alaska.
2Proved to severe disturbance and earthquakes.
3Mineral mines as huge amount of compression takes place between plate. [tag] South China Sea, Luzon province philippines.
4Very deep valleys at convergent boundaries, some of the deepest on planet.
5Most found under Pacific Ocean.
6Biodiversity in halophytic environment - Very biodiversity with on top, 'silent darkness at bottom'. [Diagram showing Pacific Ocean with Mariana Trench location]
7Facilitate heat exchange across oceans.

Thus, oceanic trenches from a crucial ecosystem and are geological and seismic marvels, spread across oceanic land or.

[Continuation of Q6]

2Proved to severe disturbance and earthquakes.
3Mineral mines as huge amount of compression takes place between plate. [tag] South China Sea, Luzon province philippines.
4Very deep valleys at convergent boundaries, some of the deepest on planet.
5Most found under Pacific Ocean.
6Biodiversity in halophytic environment - Very biodiversity with on top, 'silent darkness at bottom'.
7Facilitate heat exchange across oceans.

Thus, oceanic trenches from a crucial ecosystem and are geological and seismic marvels, spread across oceanic land or.

246 words19 paragraphs

Diagram

Two diagrams: (1) Cross-section showing continental shelf, continental slope, and oceanic trench formation; (2) Map of Pacific Ocean showing Mariana Trench location with reference to Japan and Mariana islands

  • Clear definition of ocean trenches
  • Good use of diagrams to visualize formation
  • Mentions specific examples (Mariana Trench, South China Sea)
  • Covers multiple aspects (formation, characteristics, biodiversity)
  • Addresses seismic and ecological significance

Open original scan

Page 17

Topper

Zinnia Arora

AIR 62028

Subject & Paper

GS1GS1

Topic

Important Geophysical Phenomena

Oceanic geomorphology

Ocean trench formation and characteristics

Writing Stats

246

Total words

19

Paragraphs

Scientific with some clarity issues

Tone