Science Topics term usage 2007-03-20

This analysis excludes the activity of search-engine spiders, USGS users, and transactions resulting in errors.

(Table shows only the 40 most frequently chosen terms.)

98	geographic information systems (GIS)
87	earthquakes
81	volcanoes
31	nonmetallic resources
28	tectonic processes
27	acid deposition
26	earthquake occurrences
24	earth structure
23	mineral resources
19	energy resources
19	climate change
17	contamination and pollution
17	rocks and deposits
17	sediment transport
17	tsunamis
16	human impacts
16	geologic structure
16	ground water
15	hurricanes
15	hydrology
14	precipitation (atmospheric)
14	floods
14	ground-water flow
14	ocean characteristics
13	biogeochemical cycling
13	geologic history
12	landslides
12	water use
12	health and disease
12	water supply and demand
12	endangered species
12	sea-floor characteristics
11	oil resources
11	streams
11	water quality
11	invasive species
10	hazards
10	global warming
10	map coordinate systems
10	hydrogeology

Science Topics term usage Tuesday, 2007-03-20