1 .		The most influential control of soil formation is ____________.
2 .		The process responsible for moving material downslope without the aid of running water, wind, or ice is ____________.
3 .		The disintegration and decomposition of rock at or near Earth's surface is called ____________.
4 .		Decayed organic matter in soil is called ____________.
5 .		Chemical weathering will be most rapid in ____________ climates.
6 .		Which soil type is most often associated with the wet tropics?
7 .		When a rock is subjected to ____________ it breaks into smaller pieces having the same characteristics as the original rock.
8 .		Clay minerals are produced from the chemical weathering of the ____________ minerals.
9 .		Whenever the characteristics and internal structures of weathered minerals have been altered, they have undergone ____________.
10 .		The atmospheric gas that forms a mild acid when dissolved in water is ____________.
11 .		The most important agent of chemical weathering is ____________.
12 .		When a mass of material moves downslope along a curved surface the process is called ____________.
13 .		In a well developed soil profile the ____________ horizon is the topmost layer.
14 .		The accumulation of rock fragments found at the base of many cliffs is referred to as the ____________.
15 .		The most widespread form of mass wasting is ____________.
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