Science Topics term usage 2006-12-13

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.)

129	geographic information systems (GIS)
127	river systems
117	earthquakes
63	volcanoes
37	earthquake occurrences
32	ground water
31	human impacts
29	tectonic processes
25	earth structure
22	mineral resources
22	coastal zones
21	maps and atlases
18	tsunamis
16	contamination and pollution
16	map coordinate systems
15	acid deposition
15	animals
15	climate change
15	floods
14	topography
14	global warming
14	ground-water flow
13	rocks and deposits
13	endangered species
13	geologic history
12	geologic structure
11	surface water (non-marine)
11	sediment transport
11	landslides
11	hydrology
11	aerial photography
11	precipitation (atmospheric)
10	topics
10	energy resources
10	outer core (earth)
10	snow and ice cover
10	desert ecosystems
10	information system design and development
9	oil resources
9	geography

Science Topics term usage Wednesday, 2006-12-13