Selected MCQ

Current Question
Ocean acidification is mainly caused by increased dissolution of atmospheric:
  • A. Nitrogen
  • B. Oxygen
  • C. Carbon dioxide
  • D. Methane only
Correct Answer: C
Explanation:
Dissolved (CO_2) forms carbonic acid, lowering seawater pH.
Related Question 1
Which atmospheric layer has lowest temperature?
  • A. Troposphere
  • B. Stratosphere
  • C. Mesosphere
  • D. Thermosphere
Correct Answer: C
Explanation:
Mesosphere is coldest.
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 ocean is largest?
  • A. Atlantic
  • B. Indian
  • C. Pacific
  • D. Arctic
Correct Answer: C
Explanation:
Pacific Ocean is largest.