Amorphous Minerals Quiz

Allophane is crystalline, while humus is amorphous

Allophane is soluble in water, while humus is insoluble

Allophane has a variable charge depending on soil acidity, while humus has a high cation exchange capacity (correct)

Allophane is a product of plant and animal remains, while humus is a mixture of silica and alumina

Silica and alumina

Carbon atoms

Hydroxyl ions (OH-) (correct)

Iron oxide

In soils forming from volcanic ash (correct)

In mountainous regions

In clay-rich riverbeds

In sandy desert soils

<p>Carbon, hydrogen, and oxygen</p> Signup and view all the answers

<p>Humus</p> Signup and view all the answers