Science Topics term usage 2007-04-16

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.)

297	river systems
118	geographic information systems (GIS)
87	earthquakes
85	volcanoes
46	stream discharge
39	ground water
31	animals
30	floods
30	earthquake occurrences
27	energy resources
27	climate change
26	earth structure
24	endangered species
24	stream-gage measurement
22	streamflow
21	hurricanes
21	rocks and deposits
21	surface water (non-marine)
20	acid deposition
20	water quality
20	river reaches
20	water resources
19	tsunamis
19	hydrology
18	geologic history
17	contamination and pollution
16	global warming
16	tectonic processes
16	landslides
14	human impacts
13	mineral resources
13	environmental assessment
13	sea-floor characteristics
13	ground-water flow
13	sediment transport
13	geologic structure
12	hydrogeology
12	droughts
12	streams
12	oil resources

Science Topics term usage Monday, 2007-04-16