Science Topics term usage 2008-01-14

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.)

77	geographic information systems (GIS)
64	volcanoes
47	soil sciences
42	earthquakes
30	acid deposition
20	earth structure
18	climate change
18	land use and land cover
16	mineral resources
16	floods
16	videography
15	earthquake occurrences
14	contamination and pollution
14	water quality
14	ground-water flow
14	energy resources
13	animals
12	human impacts
12	ground water
12	aquatic ecosystems
11	desert ecosystems
11	rocks and deposits
11	geochemistry
10	tectonic processes
10	river systems
10	USGS Quadrangles
9	ecosystems
9	sediment transport
9	droughts
9	hydrology
9	global change
9	birds
9	aerial photography
9	population and community ecology
8	hurricanes
8	water resources
8	stream-gage measurement
8	streamflow
8	water circulation
8	geologic history

Science Topics term usage Monday, 2008-01-14