Science Topics term usage 2007-02-01

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.)

123	volcanoes
117	geographic information systems (GIS)
105	earthquakes
31	contamination and pollution
28	tectonic processes
28	ground water
27	deltas
23	acid deposition
22	earth structure
22	human impacts
21	mineral resources
19	water resources
19	tsunamis
19	earthquake occurrences
18	floods
18	energy resources
18	earth sciences
18	geospatial datasets
17	endangered species
17	natural gas resources
16	lithostratigraphy
16	earth characteristics
15	climate change
15	birds
15	animals
14	health and disease
14	volcanic activity
14	rocks and deposits
14	water supply and demand
13	maps and atlases
13	topography
13	ground-water flow
13	geologic structure
12	sediment transport
12	outer core (earth)
12	map coordinate systems
12	global change
12	hurricanes
11	field methods
11	coastal zones

Science Topics term usage Thursday, 2007-02-01