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Hydrosphere – 9th Geography | 25 Questions (Ocean Relief, Salinity, Currents, Tides, Maritime Zones) - Hydrosphere geography quiz 9th English
25:00
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01. About how much of the Earth's surface is covered by water?
A
29%
B
50%
C
71%
D
91%
02. Roughly what share of the Earth's total water is fresh water?
A
About 3%
B
10%
C
25%
D
50%
03. Which is the largest and deepest ocean?
A
Atlantic
B
Pacific
C
Indian
D
Arctic
04. Which is the smallest and shallowest ocean?
A
Indian
B
Southern
C
Atlantic
D
Arctic
05. Where is the deepest point of the oceans?
A
Puerto Rico Trench
B
Java Trench
C
Challenger Deep, Mariana Trench
D
Tonga Trench
06. The gently sloping, submerged edge of a continent is called?
A
Continental shelf
B
Continental slope
C
Abyssal plain
D
Ocean trench
07. The flat, deep floor of the ocean is called?
A
Continental shelf
B
Abyssal plain
C
Continental rise
D
Ridge
08. Long underwater mountain ranges in the oceans are called?
A
Trenches
B
Guyots
C
Mid-oceanic ridges
D
Shelves
09. Flat-topped submarine mountains are called?
A
Seamounts
B
Guyots
C
Atolls
D
Trenches
10. What is the average salinity of ocean water?
A
25‰
B
30‰
C
35‰
D
40‰
11. Which warm current flows off the coast of Japan?
A
Kuroshio
B
Oyashio
C
Labrador
D
Canaries
12. Which cold current flows along the coast of Peru?
A
Gulf Stream
B
Kuroshio
C
Agulhas
D
Humboldt (Peru) Current
13. The warm Gulf Stream flows in which ocean?
A
Pacific
B
Atlantic
C
Indian
D
Arctic
14. Mixing of the warm Gulf Stream and cold Labrador Current forms which rich fishing ground?
A
Grand Banks
B
Dogger Bank
C
Sunda Shelf
D
Gulf of Mannar
15. The periodic rise and fall of sea level due to the pull of the Moon and Sun is called?
A
Waves
B
Currents
C
Tides
D
Tsunamis
16. The highest tides that occur on full moon and new moon days are?
A
Neap tides
B
Spring tides
C
Ebb tides
D
Low tides
17. Neap tides occur when the Sun and Moon are?
A
In a straight line with Earth
B
On the same side of Earth
C
Behind the Earth
D
At right angles with respect to Earth
18. What is the interval between two successive high tides?
A
6 hours
B
12 hours 25 minutes
C
24 hours
D
18 hours
19. India's territorial waters extend up to?
A
12 nautical miles
B
6 nautical miles
C
24 nautical miles
D
200 nautical miles
20. The Exclusive Economic Zone (EEZ) extends up to?
A
12 nautical miles
B
24 nautical miles
C
100 nautical miles
D
200 nautical miles
21. Which instrument is used to measure ocean depth?
A
Barometer
B
Seismograph
C
Echo sounder (Fathometer)
D
Hygrometer
22. One fathom is equal to?
A
3 feet
B
6 feet
C
10 feet
D
1 metre
23. The process by which water vapour turns into water droplets is?
A
Evaporation
B
Precipitation
C
Transpiration
D
Condensation
24. The ocean currents of the North Indian Ocean?
A
Always flow eastward
B
Reverse direction with the monsoons
C
Do not exist
D
Are all cold
25. Which is the second largest ocean?
A
Atlantic
B
Indian
C
Arctic
D
Southern
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