Science Topics term usage 2006-11-08

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.)

145	earthquakes
112	volcanoes
59	geographic information systems (GIS)
40	acid deposition
38	earthquake occurrences
32	tectonic processes
31	earth structure
28	contamination and pollution
27	vertebrate zoology
27	geologic history
26	parasites
26	streamflow
24	energy resources
22	volcanic activity
22	water quality
21	climate change
21	maps and atlases
21	erosion
20	oil resources
20	invasive species
20	desert ecosystems
20	floods
20	human impacts
19	sediment transport
19	landslides
18	drainage basins
18	tsunamis
18	hurricanes
17	water use
16	rocks and deposits
16	endangered species
16	ground-water flow
16	topography
16	magnetic field (earth)
16	land use and land cover
16	animals
15	ground water
15	health and disease
15	surface water (non-marine)
15	seismology

Science Topics term usage Wednesday, 2006-11-08