Answers24
The national forests are managed on - ANSWERS-a sustainable-yield multiple-use basis
Selective cutting - ANSWERS-maintains an uneven age stand of trees of different species ages
and sizes
The island with the greatest number of unique species is - ANSWERS-Madagascar
the first national park was created in - ANSWERS-the united states
the columbia river is located in the - ANSWERS-pacific northwest
the worlds largest hydroelectric system is found on the - ANSWERS-columbia river
dams and resevoirs - ANSWERS-all of the above ( hurting all the fish and salmon to lazy to type
them all out
the US population is - ANSWERS-shifting to the south and the west
species which have a right to life regardless of their usefulness to humans have - ANSWERS-
inherent value
one of the worlds most dangerous occupations because of accidents and the incidence of
disease is - ANSWERS-subsurface
,chief ingredient of most solar cells is - ANSWERS-SILICON
Which of the following are a point source of water pollution? - ANSWERS-offshore oil wells
If the world's population grew by 2% in 1998 and continued at that rate, how long would it take
Earth's population to double? - ANSWERS-35 years
All of the following are general types of nutrient cycles except - ANSWERS-the carbohydrate
cycle
Which of the following is false? Tectonic plates... - ANSWERS-are composed of crust and core
The fissionable fraction of the fuel in a nuclear reactor is - ANSWERS-uranium-235
Net energy is - ANSWERS-the useful energy from an energy resource minus the amount of
energy used and wasted in producing it
The most important factor in determining which biome is found in a particular area is -
ANSWERS-climate
During an El Nino-Southern Oscillation (ENSO) - ANSWERS-upwellings of cold, nutrient-rich
water are suppressed
The ocean zone that covers the continental shelf is the - ANSWERS-coastal zone
The dissolving of material from the upper layers of the soil and its movement to lower horizons
is called - ANSWERS-leaching
, Water covers about __% of the Earth's surface - ANSWERS-71
Species that normally live and thrive in a particular ecosystem are known as - ANSWERS-native
species
The greatest use of oil in the United States is for - ANSWERS-transportation
Thriving coral reefs require - ANSWERS-dissolved-oxygen in nutrients
Which of the choices below list stages of coal formation in order from highest to lowest heat
content - ANSWERS-anthracite-bituminous-lignite-peat
An environmentally sustainable society - ANSWERS-all of the above
Hydroelectric plants - ANSWERS-help control flooding and supply a regulated flow of irrigation
water to areas below the dam
Planting crops in alternating rows of close-growing plants - ANSWERS-strip-cropping
Nitrogen fixation is accomplished by - ANSWERS-bacteria
Mature temperature deciduous forests ___ than tropical rain forests - ANSWERS-have more
plant life at ground level
Trees with needlelike leaves that are kept year round are especially abundant in which biome? -
ANSWERS-coniferous forest