Science Topics term usage 2007-05-09

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.)

187	river systems
94	geographic information systems (GIS)
89	earthquakes
77	volcanoes
37	earth structure
29	earthquake occurrences
28	floods
27	climate change
25	acid deposition
23	hydrology
22	tectonic processes
22	water resources
20	tsunamis
19	stream discharge
18	sediment transport
18	endangered species
18	health and disease
18	maps and atlases
18	ground water
17	mineral resources
17	hurricanes
16	hazards
16	energy resources
15	geologic history
15	landslides
15	human impacts
15	stream-gage measurement
15	global change
15	biodiversity
15	wildlife
14	water quality
14	global warming
13	aquatic ecosystems
13	streamflow
13	desert ecosystems
13	surface water (non-marine)
13	animals
13	ecosystems
12	aerial photography
12	plants (organisms)

Science Topics term usage Wednesday, 2007-05-09