Science Topics term usage 2007-05-15

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.)

96	geographic information systems (GIS)
68	volcanoes
68	earthquakes
52	natural gas resources
24	acid deposition
23	earth structure
22	water quality
21	ground water
20	earthquake occurrences
20	energy resources
20	climate change
19	contamination and pollution
19	hurricanes
18	ocean characteristics
18	geologic history
17	tectonic processes
17	mineral resources
16	human impacts
16	streamflow
16	ground-water flow
15	hydrology
15	water resources
15	sea-floor characteristics
15	oil resources
15	geologic structure
15	surface water (non-marine)
14	sediment transport
14	animals
14	tsunamis
14	health and disease
14	global warming
14	industrial pollution
14	water cycle
12	water supply and demand
12	maps and atlases
12	geography
12	river systems
11	hydrogeology
11	landslides
11	precipitation (atmospheric)

Science Topics term usage Tuesday, 2007-05-15