Question 1

Silicate clay accumulation is most common in the ____.

Accepted Answer

A)  A horizon 
B)  B horizon 
C)  C horizon 
D)  O Horizon 
E)  E horizon 
A)  A horizon 
B)  B horizon 
C)  C horizon 
D)  O Horizon 
E)  E horizon

Question 2

The presence of iron in a mineral generally increases its resistance to chemical breakdown.

Accepted Answer

A) True 
 B)False

Question 3

Which of the following statements is not correct?

Accepted Answer

A)  Grasslands are found in semi-arid and sub-humid areas. 
B)  Coniferous forests are found mostly in cool humid areas. 
C)  The type of native vegetation is controlled primarily by climate. 
D)  Dense forests are found soil profiles have prominent O horizons. 
E)  Tropical forests protect the soil from excessive weathering. 
A)  Grasslands are found in semi-arid and sub-humid areas. 
B)  Coniferous forests are found mostly in cool humid areas. 
C)  The type of native vegetation is controlled primarily by climate. 
D)  Dense forests are found soil profiles have prominent O horizons. 
E)  Tropical forests protect the soil from excessive weathering.

Question 4

Alluvial fans are usually characterized by ______ soils.

Accepted Answer

A)  sandy and gravelly 
B)  clay textured 
C)  poorly drained 
D)  nearly level 
A)  sandy and gravelly 
B)  clay textured 
C)  poorly drained 
D)  nearly level

Question 5

Which mineral is most resistant to weathering under humid temperate conditions?

Accepted Answer

A)  dolomite 
B)  muscovite 
C)  gypsum 
D)  gibbsite 
E)  biotite. 
A)  dolomite 
B)  muscovite 
C)  gypsum 
D)  gibbsite 
E)  biotite.

Question 6

Mechanical weathering processes result in:

Accepted Answer

A)  the decomposition of primary minerals 
B)  the hydrolysis of minerals through frost action 
C)  the disintegration of rocks due to differential expansion of minerals 
D)  the oxidation of iron and manganese compounds 
A)  the decomposition of primary minerals 
B)  the hydrolysis of minerals through frost action 
C)  the disintegration of rocks due to differential expansion of minerals 
D)  the oxidation of iron and manganese compounds

Question 7

In most B horizons one of the dominant processes of soil formation has been eluviation.

Accepted Answer

A) True 
 B)False

Question 8

A soil developed in transported parent materials will likely have properties related to the properties of the rock below the C horizon.

Accepted Answer

A) True 
 B)False

Question 9

"Biotite-->clay-->iron oxide" represents a ________.

Accepted Answer

A)  catena 
B)  weathering sequence 
C)  silicate mineral sequence 
D)  both A and B 
E)  none of the above 
A)  catena 
B)  weathering sequence 
C)  silicate mineral sequence 
D)  both A and B 
E)  none of the above

Question 10

Organic deposits are most common in areas where water flow over the soil surface is restricted.

Accepted Answer

A) True 
 B)False

Question 11

Organic matter accumulation is most pronounced in the ____.

Accepted Answer

A)  O horizon 
B)  A horizon 
C)  E horizon 
D)  B horizon 
E)  C horizon 
A)  O horizon 
B)  A horizon 
C)  E horizon 
D)  B horizon 
E)  C horizon

Question 12

Igneous rocks can best be characterized as:

Accepted Answer

A)  rocks formed when molten magma solidifies 
B)  rocks containing both feldspars and micas 
C)  rocks formed from the recrystallization of sedimentary material 
D)  rocks containing a mixture of primary and secondary minerals 
E)  rocks found primarily near volcanoes. 
A)  rocks formed when molten magma solidifies 
B)  rocks containing both feldspars and micas 
C)  rocks formed from the recrystallization of sedimentary material 
D)  rocks containing a mixture of primary and secondary minerals 
E)  rocks found primarily near volcanoes.

Question 13

The A horizons are more apt to be cultivated than the E horizons.

Accepted Answer

A) True 
 B)False

Question 14

Secondary minerals are most prominent in the fraction of soils.

Accepted Answer

A)  organic 
B)  sand 
C)  silt 
D)  clay 
A)  organic 
B)  sand 
C)  silt 
D)  clay

Question 15

Which of the following statements is correct?

Accepted Answer

A)  Soils on hillsides tend to be deeper than those on level lands. 
B)  Lacustrine parent materials have been subject to weathering for shorter periods of time than residual parent materials nearby. 
C)  Limestone parent materials enhance the process of acidification. 
D)  Nutrient cycling in forested areas contributes little to soil formation. 
E)  Calcium carbonate accumulation is more prominent in humid than in arid regions. 
A)  Soils on hillsides tend to be deeper than those on level lands. 
B)  Lacustrine parent materials have been subject to weathering for shorter periods of time than residual parent materials nearby. 
C)  Limestone parent materials enhance the process of acidification. 
D)  Nutrient cycling in forested areas contributes little to soil formation. 
E)  Calcium carbonate accumulation is more prominent in humid than in arid regions.

Question 16

Marine sediments are typical parent materials in coastal plain areas.

Accepted Answer

A) True 
 B)False

Question 17

The topmost horizon in most humid region forest soils is the A horizon.

Accepted Answer

A) True 
 B)False

Question 18

The C horizons are generally more completely weathered than the other horizons.

Accepted Answer

A) True 
 B)False

Question 19

Sapric and fibric are terms used to describe peat parent materials.

Accepted Answer

A) True 
 B)False

Question 20

Residual parent materials are best described as __________.

Accepted Answer

A)  materials formed under organic residues. 
B)  materials formed by weathering of rocks and minerals in place. 
C)  materials transported from one location to another by water, ice or wind. 
D)  materials more dominant in Iowa than in the Southern United States. 
E)  upland materials formed with relatively little chemical weathering. 
A)  materials formed under organic residues. 
B)  materials formed by weathering of rocks and minerals in place. 
C)  materials transported from one location to another by water, ice or wind. 
D)  materials more dominant in Iowa than in the Southern United States. 
E)  upland materials formed with relatively little chemical weathering.

Silicate clay accumulation is most common in the ____.

The presence of iron in a mineral generally increases its resistance to chemical breakdown.

Which of the following statements is not correct?

Alluvial fans are usually characterized by ______ soils.

Which mineral is most resistant to weathering under humid temperate conditions?

Mechanical weathering processes result in:

In most B horizons one of the dominant processes of soil formation has been eluviation.

A soil developed in transported parent materials will likely have properties related to the properties of the rock below the C horizon.

"Biotite-->clay-->iron oxide" represents a ________.

Organic deposits are most common in areas where water flow over the soil surface is restricted.

Organic matter accumulation is most pronounced in the ____.

Igneous rocks can best be characterized as:

The A horizons are more apt to be cultivated than the E horizons.

Secondary minerals are most prominent in the fraction of soils.

Which of the following statements is correct?

Marine sediments are typical parent materials in coastal plain areas.

The topmost horizon in most humid region forest soils is the A horizon.

The C horizons are generally more completely weathered than the other horizons.

Sapric and fibric are terms used to describe peat parent materials.

Residual parent materials are best described as __________.

The Soils Around Us

Soil Classification

Soil Architecture and Physical Properties

Soil Water: Characteristics and Behavior

Soil and the Hydrologic Cycle

Soil Aeration and Temperature

The Colloidal Fraction: Seat of Soil Chemical and Physical Activity

Soil Acidity, Alkalinity, Aridity and Salinity

Organisms and Ecology of the Soil

Soil Organic Matter Overview

Nutrient Cycles and Soil Fertility

Practical Nutrient Management

Soil Erosion and Its Control

Soils and Chemical Pollution

Filters

Exam 2: Formation of Soils From Parent Materials

Silicate clay accumulation is most common in the ____.

The presence of iron in a mineral generally increases its resistance to chemical breakdown.

Which of the following statements is not correct?

Alluvial fans are usually characterized by ______ soils.

Which mineral is most resistant to weathering under humid temperate conditions?

Mechanical weathering processes result in:

In most B horizons one of the dominant processes of soil formation has been eluviation.

A soil developed in transported parent materials will likely have properties related to the properties of the rock below the C horizon.

"Biotite-->clay-->iron oxide" represents a ________.

Organic deposits are most common in areas where water flow over the soil surface is restricted.

Organic matter accumulation is most pronounced in the ____.

Igneous rocks can best be characterized as:

The A horizons are more apt to be cultivated than the E horizons.

Secondary minerals are most prominent in the fraction of soils.

Which of the following statements is correct?

Marine sediments are typical parent materials in coastal plain areas.

The topmost horizon in most humid region forest soils is the A horizon.

The C horizons are generally more completely weathered than the other horizons.

Sapric and fibric are terms used to describe peat parent materials.

Residual parent materials are best described as __________.

The Soils Around Us

Soil Classification

Soil Architecture and Physical Properties

Soil Water: Characteristics and Behavior

Soil and the Hydrologic Cycle

Soil Aeration and Temperature

The Colloidal Fraction: Seat of Soil Chemical and Physical Activity

Soil Acidity, Alkalinity, Aridity and Salinity

Organisms and Ecology of the Soil

Soil Organic Matter Overview

Nutrient Cycles and Soil Fertility

Practical Nutrient Management

Soil Erosion and Its Control

Soils and Chemical Pollution

Filters