Science Topics term usage 2007-12-04

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.)

63	geographic information systems (GIS)
51	benthic ecosystems
48	earthquakes
43	volcanoes
25	contamination and pollution
25	climate change
21	acid deposition
20	earthquake occurrences
20	erosion
20	plants (organisms)
19	rocks and deposits
19	snow and ice cover
18	earth structure
18	health and disease
17	global warming
17	mineral resources
16	ocean characteristics
16	endangered species
15	land use and land cover
14	ground water
14	floods
14	tsunamis
14	geologic history
13	water quality
13	aquatic ecosystems
13	geologic structure
13	human impacts
13	ground-water flow
12	biogeography
12	precipitation (atmospheric)
12	animals
12	streamflow
12	global change
12	real-time monitoring and reporting
11	aquatic biology
11	USGS Quadrangles
11	crust (earth)
11	water supply and demand
11	sediment transport
11	energy resources

Science Topics term usage Tuesday, 2007-12-04