Question

Which particle have the small size compare to clay?

Answer 1

>4.7 mm ==> Gravel
7.5 Micron -- 4.7 mm ==> sand
2 mircron -- 7.5 micron ==> silt
clay..

this is basic classification of soil based on grain size distribution so below

clay is the one which is the small size.

Answer 2

I think it is the smallest particle because clay size is