Advection - GS questions based on daily current affairs

1)   Advection is

a. Fluid's bulk motion
b. Transporting a substance by a fluid due to the fluid's bulk motion
c. Movement of fluid’s molecules
d. Movement of fluid from lower pressure place to higher pressure place
Answer  Explanation 

ANSWER: Transporting a substance by a fluid due to the fluid's bulk motion

Explanation:

  • Advection is a transport mechanism of a substance or conserved property by a fluid due to the fluid's bulk motion.
  • An example of advection is the transport of pollutants or silt in a river by bulk water flow downstream. Another commonly advected quantity is energy or enthalpy.
  • Advection is sometimes confused with the more encompassing process of convection.
  • Convection is the concerted, collective movement of groups or aggregates of molecules within fluids (e.g., liquids, gases) and rheids, through advection or through diffusion or as a combination of both of them.

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