What percentage of the earths land area is suitable for agriculture?

Question 1
How are San Francisco, California, and Mount Saint Helens, Washington related?
Both lie on a geological plate boundary.
Both are part of the same mountain range.
They were formed by the same volcanic event.
Both are regions of upwelling.
Question 2
In soil formation, the parent material provides:
humus
minerals
water-holding capacity
mycorrhizae
Question 3
What percentage of the earths land area is suitable for agriculture?
1%
6%
11%
27%
Question 4
Which of the following identifies a method used to separate impurities from molten metal?
tailings
phytoremediation
mine drainage
smelting
Question 5
Which of the following statements about nutrient cycling is TRUE?
Bacteria and fungi are involved in nutrient cycling as they decompose detritus transforming large organic molecules into small inorganic molecules, including carbon dioxide, water, and nutrient minerals like nitrates.
Nutrient cycling is the pathway of various nutrient minerals or elements from the environment through organisms and back to the environment.
Nonliving processes are also involved in nutrient cycling, such as the weathering of the parent material replaces some nutrient minerals lost through erosion.
All of the above statements are true about nutrient cycling.
Question 6
Contour plowing, strip cropping, and terracing are soil conservation methods that are BEST suited to which of the following situations?
Arid soils prone to salinization
Nitrogen depleted soils
Reclaimed mine areas
Soils located on slopes
Question 7
In the diagram below, the horizontal layers are called ___ while the entire vertical section of the soil from surface to bedrock is called ___.
soil horizonssoil profile
topsoiltopography
soil profileleaching
humussoil horizons
Question 8
Which of the following minerals is INCORRECTLY paired with its use(s)?
aluminum electrical wiring
iron steel
sand glass and concrete
sulfur making plastics and wallboard
Question 9
The hill of loose rock produced as a by-product of strip mining is known as:
overburden.
a spoil bank.
an open pit.
acid mine drainage.
Question 10
Fifty percent of all the wood that is harvested from the worlds forests is:
made into furniture
used in producing paper
burned directly as fuelwood
used to make childrens toys
Question 11
Public lands may be used for:
resource extraction
livestock grazing
wildlife habitat
all of the above
Question 12
What is the relationship of overgrazing to desertification?
Overgrazing is the destruction of a grassland ecosystem; desertification is the destruction of a desert ecosystem.
Overgrazing results in barren exposed soil; if erosion continues, it contributes to desertification.
Overgrazing is brought about by livestock operations; desertification is brought about by crop cultivation.
Overgrazing and desertification are both a result of the introduction of non-native species coupled with extended droughts.
Question 13
Sustainable forestry:
seeks to conserve forests for the long-term commercial harvest of timber and non-timber forest products by maintaining a mix of forest trees, by age and species, rather than imposing a monoculture.
due to the complexity of goals, is most effective when it involves cooperation among environmentalists, loggers, farmers, indigenous peoples, and local, state, and federal governments.
approaches vary from one forest ecosystem to another, in response to different environmental, cultural, and economic conditions.
is all of the above.
Question 14
Which of the following statements about forests in the U.S. is FALSE?
The majority (well over 50%) of U.S. forests are owned and managed by private individuals.
Forests in the eastern U.S. are holding steady or even expanding due to secondary succession on abandoned farmland.
One of the biggest threats to forests in the U.S. is their potential subdivision and conversion to suburban development like housing and shopping malls.
Projected conversion of forests to agriculture, urban, and suburban lands over the next 40 years will have the greatest potential impact in the south.
Question 15
Habitat corridors are intended to provide:
additional habitat fragmentation.
increase in species richness within forest monocultures.
a means for controlling insect pests and invasive species.
a means of migration so animals can interbreed.
Question 16
What is the reason that forests tend to be cooler and moister than surrounding open lands?
elevation
latitude
canopy cover
transpiration
Question 17
A protected zone that connects isolated unlogged or undeveloped areas is called:
a habitat corridor
sustainable forestry
shelterwood cutting
a monoculture
Question 18
Which of the following is a benefit of pesticide use?
with repeated application of pesticide, pests develop genetic resistance
pesticides reduce the amount of crop lost through competition with weeds
pesticides exhibit persistence, degrading slowly
pesticides show mobility, moving other than where they were applied
pesticidesbioaccumulate in the food chain
Question 19
Which of the following statements about pesticides is false?
The prolonged use of a particular pesticide can cause a pest population to develop genetic resistance to it.
Most pesticides affect more species than the pests for which they are intended.
Pesticides applied to agricultural lands tend to stay where they are applied.
Most pesticides are chemically stable and do not degrade readily in the environment.
Pesticides reduce the amount of crop loss through consumption by insects.
Question 20
What would a narrow-spectrum pesticide kill?
its target organism
indiscriminate organisms in the vicinity of its spray
thin-leaved plants
tapered insects such as wasps and ants
all organisms in a restricted range

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