POG_Weathering, Soil, and Mass Wasting Flashcards
The most influential control of soil formation is
climate
The process responsible for moving material downslope without the aid of running water, wind, or ice is:
mass wasting
When weathering increases the concentration of an economically valuable resource, the process is referred to as:
secondary enrichment
The disintegration and decomposition of rock at or near Earth’s surface is called:
weathering
Compared to the distant past, the current rates of soil erosion are:
faster
A soil in which no single particle size predominates over the other two is called:
loam
Platy, prismatic, blocky, and spheroidal are each a type of:
Soil structure
Chemical weathering will be most rapid in ___________ climates:
warm, wet
Which soil type is most often associated with the wet tropics?
laterite
- When a rock is subjected to _____________ it breaks into smaller pieces having the same characteristics as the original rock.
mechanical weathering
When one of the following sequences is the correct order that water will follow prior to forming a stream channel?
a. gullies, sheet erosion, rills
b. sheet erosion, rills, gullies
c. rills, sheet erosion, gullies
d. sheet erosion, gullies, rills
b. sheet erosion, rills, gullies
- Clay minerals are produced from the chemical weathering of the __________ minerals.
feldspar
The combination of organic matter, rock and mineral fragments, water, and air that covers much of Earth’s surface is referred to as _______________
soil
Which one of the following minerals is most susceptible to chemical weathering?
a. pyroxene
b. biotite
c. quartz
d. potassium feldspar
a. pyroxene
Whenever the characteristics and internal structures of weathered minerals have been altered, they have undergone _____________.
chemical weathering
