Science Topics term usage 2007-09-21

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.)

95	earthquakes
65	geographic information systems (GIS)
60	volcanoes
37	acid deposition
32	hurricanes
27	animals
26	microscopy
26	tectonic processes
25	mathematical modeling
23	earthquake occurrences
22	human impacts
22	climate change
21	contamination and pollution
20	invasive species
18	tsunamis
18	energy resources
17	earth structure
17	endangered species
16	health and disease
16	mineral resources
13	erosion
13	water quality
13	rocks and deposits
13	real-time monitoring and reporting
13	ecosystems
11	streamflow
11	ocean characteristics
11	water supply and demand
10	aerial photography
10	snow and ice cover
9	industrial pollution
9	coastal zones
9	marine geology
9	grassland ecosystems
9	droughts
8	USGS Quadrangles
8	impact cratering
8	sand deposits
8	ground-water flow
8	surface water (non-marine)

Science Topics term usage Friday, 2007-09-21