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Kuroshio Current - Quiz
Kuroshio Current
  • 1. What happens to the bottom water velocity as it travels from 3500 m to 400–700 m near the Kenting Plateau?
A) It decelerates
B) It becomes turbulent
C) It accelerates
D) It remains constant
  • 2. What is the approximate size of the Kuroshio Knoll?
A) 4 km x 8 km
B) 2 km x 5 km
C) 3 km x 7 km
D) 1 km x 3 km
  • 3. Where are fine sand particles transported by the Kuroshio Current often found?
A) In a dune field
B) On the abyssal plain
C) Near the mouth of the Yangtze
D) Inside the Kuroshio Knoll
  • 4. What happens to sediment grain size deeper down the edge of the Kenting Plateau?
A) The grains become larger
B) The grains become smaller
C) The grains dissolve completely
D) The grain size remains uniform
  • 5. Which river's sediment is transported by the Kuroshio Current?
A) Amazon River
B) Nile River
C) Yangtze River
D) Mississippi River
  • 6. Where is the Yangtze River sediment primarily deposited?
A) South China Sea floor
B) Deep sea basin
C) East China Sea inner shelf
D) Kenting Plateau
  • 7. Which minerals are specifically noted as being contained in Taiwanese sediment?
A) Kaolinite and titanium
B) Feldspar and mica
C) Smectite and quartz
D) Illite and chlorite
  • 8. What is the primary mineral component found in Luzon sediment?
A) Illite
B) Chlorite
C) Kaolinite
D) Smectite
  • 9. Pearl River sediments contain high levels of which specific elements or compounds?
A) Smectite and iron
B) Illite and chlorite
C) Quartz and magnesium
D) Kaolinite and titanium
  • 10. What limits the movement of Luzon sediment in a northwestward direction?
A) High salinity levels
B) Low water temperature
C) It is unable to travel northwestward
D) Strong northern winds
  • 11. What depth is the Kuroshio Knoll below the surface level?
A) 60–70 m
B) 3500 m
C) 400–700 m
D) 1000–1200 m
  • 12. What dynamic forces are responsible for the sediment transport of the Yangtze River?
A) The Pearl River flow and Kuroshio Current
B) Tidal forces and gravity
C) Only the Kuroshio Current
D) Kuroshio Current, China Coastal Current, and Taiwan Warm Current
  • 13. How is the Kenting Plateau's elevation maintained?
A) It is sinking into the mantle
B) It is uplifted and balanced with erosion
C) It is only shaped by erosion
D) It is built up purely by sediment deposition
  • 14. Where is Pearl River sediment trapped?
A) In the East China Sea inner shelf
B) On the Kenting Plateau
C) Above the abyssal basin between Hainan Island and the Pearl River mouth
D) On the Luzon coastline
  • 15. The Kuroshio Current is a western boundary current in which ocean?
A) North Pacific Ocean
B) Arctic Ocean
C) Indian Ocean
D) South Atlantic Ocean
  • 16. Who is credited with discovering the Kuroshio Current in 1565?
A) Bernhardus Varenius
B) King Philip II
C) James Cook
D) Andrés de Urdaneta
  • 17. What is the approximate annual average sea-surface temperature of the Kuroshio?
A) 15 °C
B) 30 °C
C) 10 °C
D) 24 °C
  • 18. Approximately how wide is the Kuroshio Current?
A) 50 kilometres
B) 25 kilometres
C) 100 kilometres
D) 500 kilometres
  • 19. What is the Kuroshio Current's analogue in the Atlantic Ocean?
A) Gulf Stream
B) Labrador Current
C) Canary Current
D) Brazil Current
  • 20. What is the unit used to measure the transport of the Kuroshio Current?
A) Sv (Sverdrups)
B) Kilometers per hour
C) Knots
D) Celsius
  • 21. Where does the Kuroshio Current reach a transport of 65 Sv?
A) The Yonaguni Depression
B) Southeast of Japan
C) The Sea of Japan
D) East of Taiwan
  • 22. What is the deep break in the Ryukyu island chain through which the Kuroshio enters the East China Sea?
A) Yonaguni Depression
B) Bōsō Peninsula
C) Mindanao Trench
D) Tokara Strait
  • 23. How many typhoons does the Western North Pacific Ocean experience on average annually?
A) 10
B) 50
C) 5
D) 25
  • 24. What is the general reputation of warm-core rings regarding productivity?
A) They are not known for high productivity
B) They are highly productive year-round
C) They are biological deserts
D) They have more productivity than shelf waters
  • 25. What mechanism supports biological productivity in warm-core rings as they move north?
A) Solar heating
B) Tidal currents
C) Convective mixing
D) Atmospheric pressure
  • 26. What is defined as a deep mixed layer with discrete boundaries and uniform temperature?
A) Nutricline
B) Cold jet
C) Shelf water
D) Thermostad
  • 27. Where were dense populations of phytoplankton discovered within a ring?
A) At the nutricline
B) At the sea floor
C) In the shelf water
D) At the surface
  • 28. What provided evidence of biological life within the warm-core ring during acoustic studies?
A) Satellite temperature mapping
B) Visible light emissions
C) Water salinity measurements
D) Intense sound scattering
  • 29. Which event occurred in 2003 involving typhoons in the North Western Pacific?
A) A massive cooling of the Kuroshio Current
B) The complete destruction of the coral reefs
C) A permanent change in ocean salinity
D) Two algal bloom events
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