Science Topics term usage 2007-04-13

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.)

165	river systems
103	geographic information systems (GIS)
99	earthquakes
65	land use and land cover
45	volcanoes
43	earthquake occurrences
28	climate change
27	contamination and pollution
24	mineral resources
22	visualization methods
22	animals
21	tectonic processes
20	earth structure
18	human impacts
18	hydrology
17	water quality
17	ground water
16	aquatic ecosystems
15	erosion
15	streamflow
15	remote sensing
15	surface water (non-marine)
14	floods
14	geospatial datasets
14	health and disease
14	global warming
13	cartography
13	hurricanes
13	map coordinate systems
13	rocks and deposits
12	tsunamis
12	stream discharge
11	maps and atlases
11	ground-water flow
11	glaciation
11	acid deposition
11	water resources
11	geologic structure
10	magnetic field (earth)
10	seismology

Science Topics term usage Friday, 2007-04-13