The process of converting atmospheric nitrogen into nitrate is called
Nitrogen fixation
Nitrogenation
Nitrification
Denitrification
What minerals are found in the run off from agricultural land and untreated sewage effluents that are responsible for eutrophication of water bodies?
phosphorous and carbon
nitrogen and phosphorus
potassium nad arsenic
iron and manganese
Water that moves over the surfce of the ground into lakes ad rivers is called
ground water
a water table
run - off
the water cycle
Which of the following element's oxides contribute to acid rains?
silicon
sodium
oxygen
carbon
Which of the following gases is a CFC that is used in the refrigerators?
Carbon dioxide
Freon
Methane
Ammonia
Climate change may impact
agriculture natural terrestrial ecosystems and water resources
air quality oceans, and coastal zones
energy and human health
all of the above
Soil erosion can be prevented by
raising forests
deforestation
excessive use of fertilizer
overgrazing by animals
Total earth's surface covered by water is
75%
60%
85%
50%
What compounds are identified as contributing to acid rain?
carbondioxide
sulfur and nitrogen oxides
mercury oxides
phosphates
Low visibility during cold weather is due to
formation of fossil fuel
unburnt carbon particles or hydrocarbons suspended in air
lack of adequate power supply
none of these
