Selected MCQ

Current Question
Which Earth system reservoir contains the largest fraction of the planet’s freshwater?
  • A. Rivers
  • B. Atmosphere
  • C. Ice sheets and glaciers
  • D. Lakes
Correct Answer: C
Explanation:
Most freshwater is locked in continental ice and glaciers rather than liquid surface waters.
Related Question 1
Which layer contains clouds?
  • A. Troposphere
  • B. Stratosphere
  • C. Mesosphere
  • D. Thermosphere
Correct Answer: A
Explanation:
Weather and clouds occur in troposphere.
Related Question 2
A system with negative heat capacity is characteristic of:
  • A. Ideal gas
  • B. Black holes and self-gravitating systems
  • C. Solids
  • D. Liquids
Correct Answer: B
Explanation:
Adding energy can decrease temperature in gravitational systems.
Related Question 3
Which wave shows diffraction?
  • A. Light
  • B. Sound
  • C. Water
  • D. All
Correct Answer: D
Explanation:
All waves diffract.
Related Question 4
Which layer contains ionosphere?
  • A. Troposphere
  • B. Stratosphere
  • C. Thermosphere
  • D. Mesosphere
Correct Answer: C
Explanation:
Ionosphere lies within thermosphere.
Related Question 5
Which system controls reflex?
  • A. Digestive
  • B. Nervous
  • C. Respiratory
  • D. Circulatory
Correct Answer: B
Explanation:
Nervous system handles reflexes.