Science Topics term usage 2007-03-19

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.)

98	volcanoes
95	geographic information systems (GIS)
88	earthquakes
31	tectonic processes
26	biogeochemical cycling
24	energy resources
24	earthquake occurrences
21	human impacts
20	global warming
20	earth structure
20	coastal zones
20	climate change
20	mineral resources
19	sediment transport
17	mining hazards
17	rocks and deposits
15	geologic history
15	streamflow
14	tsunamis
14	acid deposition
14	surface water (non-marine)
13	floods
13	topography
13	contamination and pollution
13	map coordinate systems
13	endangered species
13	impact cratering
12	ground water
12	erosion
11	remote sensing
11	volcanic activity
11	landslides
11	health and disease
11	land use and land cover
11	geochemistry
10	water supply and demand
9	magnetic field (earth)
9	aerial photography
9	water resources
9	invasive species

Science Topics term usage Monday, 2007-03-19