Science Topics term usage 2007-04-04

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.)

113	geographic information systems (GIS)
89	earthquakes
73	volcanoes
32	estuarine ecosystems
30	ocean waves
30	mineral resources
26	geologic history
25	tectonic processes
24	earthquake occurrences
23	tsunamis
22	climate change
22	rocks and deposits
21	ground water
20	maps and atlases
20	water supply and demand
19	acid deposition
19	stream-gage measurement
19	land use and land cover
17	water resources
17	global warming
16	human impacts
16	streamflow
16	contamination and pollution
15	ecosystems
15	water quality
15	precipitation (atmospheric)
14	map coordinate systems
14	energy resources
14	geologic structure
13	ground-water flow
13	land surface characteristics
13	endangered species
13	floods
13	earth structure
12	animals
12	cartography
12	oil resources
12	topics
11	natural gas resources
11	hydrology

Science Topics term usage Wednesday, 2007-04-04