Science Topics term usage 2007-02-06

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.)

131	volcanoes
118	geographic information systems (GIS)
118	earthquakes
59	wildlife biology
59	mineral resources
46	earth structure
44	tectonic processes
35	earthquake occurrences
33	energy resources
31	climate change
27	contamination and pollution
19	geologic history
19	acid deposition
18	cartography
17	geologic structure
17	landslides
16	tsunamis
15	aquatic ecosystems
15	ground-water flow
15	ground water
15	rocks and deposits
15	floods
14	animals
14	maps and atlases
14	hurricanes
14	crust (earth)
14	river systems
13	map coordinate systems
13	erosion
12	land use and land cover
12	hazards
12	water supply and demand
12	volcanic features
12	outer core (earth)
11	ocean characteristics
11	surface water (non-marine)
10	global warming
10	endangered species
10	ecosystems
10	aerial photography

Science Topics term usage Tuesday, 2007-02-06