Science Topics term usage 2008-02-15

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.)

69	core (earth)
67	earthquakes
54	geographic information systems (GIS)
36	volcanoes
33	topography
21	inner core (earth)
17	earthquake occurrences
14	ground water
14	human impacts
12	contamination and pollution
12	geologic history
12	earth structure
12	aerial photography
12	erosion
11	precipitation (atmospheric)
10	ocean characteristics
10	ocean salinity
10	health and disease
10	land use and land cover
10	freshwater ecosystems
10	ground-water flow
10	aquatic ecosystems
10	desert ecosystems
9	acid deposition
9	volcanic eruption prediction
9	natural resource assessment
9	field methods
9	hydrology
9	global warming
9	animals
9	climate change
9	river systems
9	floods
8	biodiversity
8	coal resources
8	sedimentation
8	USGS Quadrangles
8	surface water (non-marine)
8	tectonic processes
8	natural resource management

Science Topics term usage Friday, 2008-02-15