Science Topics term usage 2007-10-09

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.)

100	earthquakes
82	climate change
69	geographic information systems (GIS)
56	volcanoes
33	earth structure
31	earthquake occurrences
23	tectonic processes
23	contamination and pollution
23	acid deposition
21	erosion
20	hurricanes
19	desert ecosystems
18	animals
18	global warming
18	geologic history
18	mineral resources
17	global change
17	streamflow
16	floods
16	health and disease
16	energy resources
15	ground-water flow
15	droughts
15	sediment transport
15	water supply and demand
14	invasive species
14	human impacts
13	ecosystems
13	precipitation (atmospheric)
13	tsunamis
12	oil resources
11	water quality
11	landslides
11	aerial photography
11	mathematical modeling
11	plants (organisms)
11	map coordinate systems
11	ground water
11	magnetic field (earth)
11	rocks and deposits

Science Topics term usage Tuesday, 2007-10-09