Multiple Choice Questions

Consider the following statements regarding Dust Particles 1 Dust particles are generally concentrat...........

Geography and Environment (CSC) World climates

Consider the following statements regarding Dust Particles:

1. Dust particles are generally concentrated in the upper layers of the atmosphere.

2. Higher concentration of these particles found in subtropical regions than equatorial regions.

Which of the above statements is/are correct?

1 only

2 only

Both 1 and 2

Neither 1 nor 2

Correct Option: (b) Explanation: Statement 1 is incorrect: Dust particles are generally concentrated in the lower layers of the atmosphere.
Supplementary notes: Dust Particles in Atmosphere Dust particles are generally concentrated in the lower layers of the atmosphere.
Convectional air currents may transport them to great heights.
The higher concentration of dust particles is found in subtropical and temperate regions due to dry winds in comparison to equatorial and polar regions.
Dust and salt particles act as hygroscopic nuclei around which water vapor condenses to produce clouds.