题目内容

This horizon in the soil profile includes bacteria, fungi, algae, and insects is called:

A horizon
B. O horizon
C. B horizon
D. C horizon

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The major controlling factors on soil are:

A. Parent material
B. Time
Climate
D. Plants and animals
E. Topography

The major weathering products are:

A. Clastic material
B. Dissolved materials
C. Eluvium
D. Regolith
E. Soil

The most likely major weathering type in the hot and humid areas is:

A. Chemical weathering
B. Mechanical weathering
C. Biological weathering
D. Human weathering

A process in which curved plates of granite rock are stripped from a larger rock mass. Its exact mechanism is still uncertain but probably due to unloading. This process is probably called:

A. Frost Action
B. Exfoliation
C. Unloading
D. Thermal expansion