Multiple Choice Quiz

Please answer all questions


1	The geological concept of plate tectonics says that the Earth's crust is composed of large plates that slowly move over the surface of the liquid mantle.
		A)	True
		B)	False


2	When water freezes and thaws, thereby splitting rocks into smaller chunks, this is an example of
		A)	chemical weathering.
		B)	mechanical weathering.
		C)	humus formation.
		D)	plate tectonics.
		E)	none of the above


3	A typical, good soil is composed of at least 45% humus.
		A)	True
		B)	False


4	Soil building begins with the physical fragmentation of
		A)	lichens.
		B)	humus.
		C)	aggregate.
		D)	parent material.
		E)	none of the above.


5	Which of the following characteristics is not a function of humus in soil?
		A)	provides nutrients
		B)	raises pH
		C)	retains moisture
		D)	helps aerate soil
		E)	humus does all of the above in soil


6	Even under ideal conditions, soft parent takes a long time to develop into soil.
		A)	True
		B)	False


7	The best type of soil for agriculture is
		A)	clay.
		B)	silt.
		C)	loam.
		D)	sand.
		E)	parent material.


8	The most friable soil is
		A)	sand.
		B)	clay.
		C)	loam.
		D)	parent material.
		E)	none of the above are friable


9	Which part of the soil profile generally contains relatively few organisms and organic material, but also has an accumulation of leached nutrients?
		A)	A horizon
		B)	B horizon
		C)	C horizon
		D)	D horizon
		E)	parent material


10	The A horizon is most likely deepest in which ecosystem?
		A)	desert
		B)	grassland
		C)	forest
		D)	tundra
		E)	taiga


11	The Dust Bowl of the 1930s in the United States is a good example of
		A)	erosion.
		B)	pioneer communities.
		C)	reduction in the C horizon.
		D)	conservation tillage.
		E)	none of the above are associated with the Dust Bowl


12	Which of the following is not an example of a soil conservation practice?
		A)	contour farming
		B)	terracing
		C)	strip farming
		D)	planting windbreaks
		E)	all of the above are examples of soil conservation practices


13	Which soil conservation practice makes extensive use of farm machinery, herbicides and pesticides, and minimum tilling?
		A)	windbreaks
		B)	terracing
		C)	conservation tillage
		D)	crop rotation
		E)	none of the above


14	Which of the following does not result from no or minimum till practices?
		A)	increased herbicide use
		B)	decreased fuel consumption
		C)	decreased soil erosion
		D)	increased tilling time
		E)	all of the above result from no or minimum tilling practices

2002 McGraw-Hill Higher Education
Any use is subject to the Terms of Use and Privacy Policy.
McGraw-Hill Higher Education is one of the many fine businesses of The McGraw-Hill Companies.