Unseen Passage Exemplar 2
A. The Scientific Exploration Extract:
The deep abyss of the Mariana Trench remains one of the most inhospitable environments on planet Earth.
At depths exceeding ten thousand meters, the water pressure is a staggering one thousand atmospheres—equivalent
to having fifty jumbo jets stacked upon a human body. Sunlight is extinguished completely below a depth of one thousand meters,
shrouding the trench in eternal, frigid darkness where temperatures hover barely above freezing.
Early oceanographers assumed that these abyssal trenches were barren oceanic deserts devoid of living creatures.
However, modern robotic submersibles equipped with titanium hulls and halogen searchlights have uncovered an astonishing biodiversity.
Bizarre organisms thrive by metabolizing toxic sulfur compounds spewing from hydrothermal vents in total chemosynthesis.
Translucent snailfish glide through the crushing depths, their flexible bones and specialized enzymes withstanding colossal hydrostatic pressures.
Yet this pristine sanctuary faces severe existential hazards. Submersible probes have discovered microplastic filaments,
discarded beverage cans, and toxic chemical pollutants lodged within the tissues of abyssal amphipods, proving that human pollution has penetrated
the deepest ocean crevices on the globe.
B. Question 4(a) Contextual Vocabulary Drill:
1. Find a word in the passage that means: "harsh, unwelcoming, or difficult to live in". (1 Mark)
Answer: inhospitable
2. Find a word that means: "unspoiled, untouched, or in original condition". (1 Mark)
Answer: pristine
C. Question 4(c) 50-Word Summary on Adaptations & Threats:
Prompt: In not more than 50 words, summarize the extreme conditions of the Mariana Trench and how organisms survive them.
| 1. The | 2. Mariana | 3. Trench | 4. features | 5. crushing |
| 6. hydrostatic | 7. pressure, | 8. freezing | 9. cold, | 10. and |
| 11. absolute | 12. darkness. | 13. Despite | 14. these | 15. extreme |
| 16. conditions, | 17. life | 18. thrives | 19. near | 20. deep |
| 21. hydrothermal | 22. vents | 23. using | 24. chemosynthesis. | 25. Organisms |
| 26. survive | 27. through | 28. specialized | 29. flexible | 30. bones |
| 31. and | 32. unique | 33. enzymes, | 34. though | 35. they |
| 36. now | 37. face | 38. severe | 39. threats | 40. from |
| 41. penetrating | 42. microplastics | 43. and | 44. toxic | 45. human |
| 46. chemical | 47. pollution | 48. in | 49. the | 50. abyss. |
Result: Exactly 50 Words | Captures Trench Conditions, Chemosynthesis, Adaptations & Pollution | Full Marks!