Science Topics term usage 2006-12-20

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.)

119	geographic information systems (GIS)
74	volcanoes
65	earthquakes
35	drilling and coring
19	nonindigenous species
18	mineral resources
15	ground water
15	sediment transport
15	animals
15	water quality
14	land use and land cover
14	tectonic processes
14	rocks and deposits
13	earthquake occurrences
13	topography
12	earth structure
12	aerial photography
11	climate change
11	desert ecosystems
10	oil resources
10	geochemistry
10	water supply and demand
10	acid deposition
9	natural gas resources
9	freshwater ecosystems
9	tsunamis
9	contamination and pollution
9	map coordinate systems
9	energy resources
9	magnetic field (earth)
8	human impacts
8	volcanic activity
8	hydrology
8	planetary bodies
8	ocean characteristics
8	water properties
8	ground-water flow
8	soil chemistry
8	cartography
8	geolocation measurement

Science Topics term usage Wednesday, 2006-12-20