Science Topics term usage 2007-04-05

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.)

112	geographic information systems (GIS)
73	earthquakes
69	structure contours
65	volcanoes
24	tectonic processes
21	earthquake occurrences
19	contamination and pollution
19	climate change
18	human impacts
18	ground water
17	energy resources
16	floods
16	acid deposition
15	map coordinate systems
14	tsunamis
14	rocks and deposits
14	precipitation (atmospheric)
13	ground-water flow
13	mineral resources
13	water quality
13	hurricanes
12	land use and land cover
12	structural geology
11	global warming
11	earth structure
11	sediment transport
11	global change
10	landslides
10	sedimentary rocks
10	biogeography
10	geologic structure
9	ground-water quality
9	surface water (non-marine)
9	estuarine ecosystems
9	erosion
9	streamflow
9	endangered species
9	magnetic field (earth)
9	geologic history
8	water chemistry

Science Topics term usage Thursday, 2007-04-05