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Pregunta 1
Pregunta
The study of the process by which the lithospheric plates move over the asthenosphere is called:
Respuesta
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Shelterbelt
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plate boundaries
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overburden
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plate tectonics
Pregunta 2
Pregunta
Which of the following is not a category of rock types?
Respuesta
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Minerals
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Igneous
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Sedimentary
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Metamorphic
Pregunta 3
Pregunta
Metallic or nonmetallic elements or compounds of elements that occur naturally in earth's crust are:
Respuesta
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alloys
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minerals
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ferrous
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poisonous
Pregunta 4
Pregunta
The process by which ore is melted at high temperatures to remove impurities is termed
Respuesta
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exclusion mining
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thermal mining
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chromatography
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smelting
Pregunta 5
Pregunta
How are mining lands restored?
Respuesta
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land is filled in, graded to its natural contours and vegetation planted
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toxic pollutants are removed through chemical neutralization processes
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a few seeds are thrown on the ground
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mining lands cannot be restored
Pregunta 6
Pregunta
The soil profile layer that is mostly organic matter and humus where plant litter accumulates and decays
Respuesta
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A-Horizon
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B-Horizon
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C-Horizon
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O-Horizon
Pregunta 7
Pregunta
Sustainable soil use is the
Respuesta
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constant augmentation of soils to maintain their productivity.
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planting of the same crops in a field over a period of years.
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use of soil resources without a reduction in the amount or fertility of the soil.
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changing of the soil profile periodically to maintain its efficiency.
Pregunta 8
Pregunta
In order to reduce erosion on steep hillsides, farmers
Respuesta
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plant on terraces
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plant a shelterbelt
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use soil from the O-Horizon.
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do not irrigate.
Pregunta 9
Pregunta
Acid mine drainage is pollution caused when
Respuesta
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the acidity of metals in mines exceeds level 9 on the pH scale.
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a buildup of residual acidity in solid destroys large areas of vegetation.
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dissolved toxic materials wash from mines into nearby lakes and streams.
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water, wind or ice erodes the overburden forming erosion drainage channels.
Pregunta 10
Pregunta
More than 60% of US land is owned by
Respuesta
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the Federal government
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state and local governments
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native american tribes
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private citizens, corporations and nonprofit organizations
Pregunta 11
Pregunta
The most serious problem facing global forests today is:
Respuesta
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deforestation
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high concentration of CO2 in the atmosphere
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rapid expansion of forest ecosystems
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increasing biodiversity
Pregunta 12
Pregunta
Most US national forests are managed by the
Respuesta
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US geological survey
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national parks service
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fish and wildlife service
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us forest service
Pregunta 13
Pregunta
Rangeland is land that
Respuesta
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forms a plateau
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is intensively managed
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has grasses and shrubs as the predominant vegetation
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is used for growing food crops
Pregunta 14
Pregunta
Desertification is when
Respuesta
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resources are extracted from public lands without compensating taxpayers.
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deserts receive irrigation to form oasis
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once-fertile rangeland is degraded into nonproductive desert.
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unrestricted development is allowed in wetlands
Pregunta 15
Pregunta
The primary purpose of a conservation easement is to
Respuesta
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set aside protected zones for wildlife sanctuaries.
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limit the number of livestock allowed to graze on rangelands.
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receive fair market value for resources mined in privately owned forests.
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protect privately owned forest from development for a specified number of years.
Pregunta 16
Pregunta
Which federal agencies administer public rangelands?
Respuesta
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U.S geological Survey and Fish and Wildlife Service
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Bureau of Land Management and US Forest Service
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National Parks Service and Department of the interior
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Environmental Protection Agency and Wise-use movement.
Pregunta 17
Pregunta
The National Parks Service currently administers ___ national parks.
Respuesta
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28
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58
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108
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388
Pregunta 18
Pregunta
A protected area of land in which no human development is permitted is termed
Respuesta
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mountain corridor.
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wise-use rangeland.
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permanent pasture.
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wilderness.
Pregunta 19
Pregunta
The goals of the wise-use movement include all of the following except
Respuesta
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timber management of old-growth forests.
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mining of managed areas.
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selling parts of resource-rich federal lands.
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selling the ecosystem services of wetlands.
Pregunta 20
Pregunta
Which of the following are considered the three top endangered ecosystems in the U.S.?
Respuesta
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Hawaiian coastline, rainforest, and alpine Aeolian ecosystems.
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Northern Washington scrubland, cave systems, and grasslands
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South Florida landscape, Southern Appalachian spruce-fir forests, Longleaf pine forests and savannas
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California river, stream. and wetland communities.
Pregunta 21
Pregunta
Which of the following is NOT a criterion used to evaluate whether an ecosystem is endangered?
Respuesta
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property value of the land
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prospects for future loss or degradation
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the area the ecosystem occupies
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number of endangered species living in the ecosystem.
Pregunta 22
Pregunta
Sub-Saharan Africa currently produces less food per person than it did in 1950, which means:
Respuesta
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food insecurity has increased.
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the population suffers from overnutrition.
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environmental quality has improved.
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less food is grown than in 1950.
Pregunta 23
Pregunta
A form of intensive subsistence agriculture that involves growing a variety of plants on the same field simultaneously is termed ___.
Respuesta
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nomadic farming
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shifting cultivation
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monoculture
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intercropping
Pregunta 24
Pregunta
Farmers and ranchers strive to increase yields by administering ___ to livestock.
Respuesta
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hormones and antibiotics
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broad-spectrum vitamins
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sawdust filler in feed
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artificial sunlight
Pregunta 25
Pregunta
What was the main purpose of the green revolution when it began in the middle of the 20th century?
Respuesta
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to promote organic agricultural techniques.
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to maximize polyculture in every field.
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to redistribute farmland so every person would have the means to produce his or her own food.
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to increase crop yields in order to eliminate famine.
Pregunta 26
Pregunta
Clearing grasslands and forests to grow crops results in habitat fragmentation that
Respuesta
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increases biological diversity.
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reduces biological diversity.
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has no effect on biological diversity.
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reduces the potential productivity of land.
Pregunta 27
Pregunta
___ agriculture uses methods that maintain soil productivity and a healthy ecological balance while minimizing long-term impacts.
Respuesta
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Subsistence
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Sustainable
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Industrialized
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Green revolution
Pregunta 28
Pregunta
Broad-spectrum pesticides
Respuesta
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kill beneficial organisms in addition to the targeted pest.
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are non-mobile and cannot contaminate runoff.
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are readily broken down into safe materials such as water and CO2.
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are ineffective.
Pregunta 29
Pregunta
Insecticides, herbicides, rodenticides, and fungicides are all examples of
Respuesta
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pesticides, chemicals intended to kill organisms that reduce crop yields.
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monocultures, techniques that reduce biodiversity in agriculture.
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pheromones, hormones that decrease fertility of undesirable species.
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irradiation, ionizing radiation that sterilizes soil.
Pregunta 30
Pregunta
One problem associated with pesticide use is bioaccumulation which is the
Respuesta
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development of resistance to particular combinations of pesticides.
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buildup of a persistent pesticide in an organism’s body.
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increase in strength of a pesticide over time making it more lethal.
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mobility of pesticides showing up in places where they were not applied.
Pregunta 31
Pregunta
A type of intercropping in which several kinds of plants that mature at different times are planted together is called ___.
Respuesta
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interspersed monoculture
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nomadic farming
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shifting cultivation
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polyculture
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