Science Topics term usage 2007-04-11

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.)

177	river systems
139	geographic information systems (GIS)
109	earthquakes
97	volcanoes
33	climate change
29	earthquake occurrences
27	energy resources
26	acid deposition
23	maps and atlases
22	earth structure
21	water quality
21	mineral resources
21	stream discharge
21	ground water
20	tectonic processes
19	cartography
19	global warming
19	oil resources
18	human impacts
18	floods
18	surface water (non-marine)
18	contamination and pollution
16	tsunamis
15	water use
14	streamflow
14	remote sensing
14	water resources
13	lakes
13	land use and land cover
13	marine biology
13	geologic structure
13	hydrology
12	endangered species
12	laboratory methods
12	hurricanes
11	animals
11	landslides
11	plants (organisms)
11	precipitation (atmospheric)
11	coastal zones

Science Topics term usage Wednesday, 2007-04-11