Science Topics term usage 2006-11-07

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.)

125	earthquakes
109	volcanoes
66	geographic information systems (GIS)
41	earth structure
29	tectonic processes
26	contamination and pollution
26	floods
26	acid deposition
23	earthquake occurrences
22	tsunamis
21	land use and land cover
20	geologic structure
19	erosion
19	hurricanes
19	oil resources
17	landslides
16	human impacts
16	climate change
15	vertebrate zoology
15	animals
15	water properties
15	rocks and deposits
14	endangered species
14	water quality
14	energy resources
14	volcanic activity
13	desert ecosystems
13	sediment transport
13	geologic history
13	water supply and demand
13	sedimentary rocks
13	water chemistry
12	industrial pollution
12	aerial photography
12	invasive species
12	botany
11	stream-gage measurement
11	water use
10	aquatic ecosystems
10	mineral resources

Science Topics term usage Tuesday, 2006-11-07