Science Topics term usage 2007-01-29

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.)

131	geographic information systems (GIS)
121	earthquakes
104	volcanoes
33	earth structure
33	earthquake occurrences
29	tectonic processes
29	vascular plants
27	contamination and pollution
24	climate change
24	ground water
23	maps and atlases
21	acid deposition
18	ground-water flow
17	human impacts
17	rocks and deposits
15	sediment transport
14	volcanic activity
14	human environmental safety
14	map coordinate systems
13	animals
13	erosion
13	outer core (earth)
13	topography
13	endangered species
13	aerial photography
13	global warming
13	magnetic field (earth)
13	oil resources
12	invasive species
12	geologic history
11	precipitation (atmospheric)
11	water quality
11	surface water (non-marine)
11	river systems
11	geologic structure
11	global change
10	mineral resources
10	population and community ecology
10	ecosystems
10	streamflow

Science Topics term usage Monday, 2007-01-29