Question

In the International Union of Soil Science classification system, fine sand has a size range of

• A. 0.2 - 2.0 mm
• B. 0.02 - 0.2 mm
• C. 0.002 - 0.02 mm
• D. <0.002 mm

Hint:

Memorize soil particle sizes: Fine sand = 0.02–0.2 mm; Silt = 0.002–0.02 mm; Clay < 0.002 mm.

Answer 1

The Correct Option is B

According to the International Union of Soil Sciences, fine sand ranges from 0.02 mm to 0.2 mm in particle size.

Answer 2

Scale-based reasoning: The IUSS particle-size scale grades soil separates from coarse to fine as follows: coarse sand \( 0.2\text{-}2.0 \) mm, fine sand \( 0.02\text{-}0.2 \) mm, silt \( 0.002\text{-}0.02 \) mm, and clay less than \( 0.002 \) mm.
Placing "fine sand" on this scale, it sits directly below coarse sand and above silt, giving the range \( 0.02 \) mm to \( 0.2 \) mm.