Question

Match List-I with List-II. List-I Process of wind erosion: A. Floating of small size particles in the air stream, B. Soil particles movement in a series of bounces or jumps, C. Minimum wind velocity required to initiate the movement of soil particles, D. Rolling or sliding of large soil particles along the ground surface. List-II Terminology of wind erosion: I. Surface creep, II. Threshold velocity, III. Suspension, IV. Saltation.

• A. A-II, B-I, C-III, D-IV
• B. A-III, B-IV, C-II, D-I
• C. A-II, B-IV, C-III, D-I
• D. A-I, B-II, C-III, D-IV

Hint:

Wind erosion occurs by suspension, saltation and surface creep.

Answer 1

The Correct Option is B

Concept:
Wind erosion moves soil particles mainly by suspension, saltation and surface creep.

Step 1: Suspension.
Floating of small soil particles in the air stream is called suspension. \[ A\rightarrow III \]

Step 2: Saltation.
Movement of soil particles in a series of bounces or jumps is called saltation. \[ B\rightarrow IV \]

Step 3: Threshold velocity.
Minimum wind velocity needed to initiate soil particle movement is threshold velocity. \[ C\rightarrow II \]

Step 4: Surface creep.
Rolling or sliding of large soil particles along the ground surface is called surface creep. \[ D\rightarrow I \] Therefore: \[ A-III,\ B-IV,\ C-II,\ D-I \] \[ \therefore \text{Correct Answer is (B)} \]