Selected MCQ

Current Question
The thermocline in the ocean is a zone of rapid change in:
  • A. Salinity only
  • B. Temperature with depth
  • C. pH with latitude
  • D. Nutrients with longitude
Correct Answer: B
Explanation:
The thermocline separates warm surface water from colder deep water by a steep thermal gradient.
Related Question 1
Which ocean zone has no sunlight?
  • A. Photic
  • B. Aphotic
  • C. Littoral
  • D. Neritic
Correct Answer: B
Explanation:
Aphotic zone lacks sunlight penetration.
Related Question 2
Which ocean has deepest trench?
  • A. Atlantic
  • B. Indian
  • C. Pacific
  • D. Arctic
Correct Answer: C
Explanation:
Mariana Trench is in Pacific.
Related Question 3
Which ocean current is cold?
  • A. Gulf Stream
  • B. Kuroshio
  • C. Canary
  • D. Brazil
Correct Answer: C
Explanation:
Canary current is cold.
Related Question 4
Which ocean is smallest?
  • A. Atlantic
  • B. Indian
  • C. Arctic
  • D. Pacific
Correct Answer: C
Explanation:
Arctic Ocean is smallest.
Related Question 5
Which gas contributes to ozone depletion?
  • A. CO₂
  • B. CFC
  • C. N₂
  • D. O₂
Correct Answer: B
Explanation:
CFCs release chlorine radicals.