Science Topics term usage 2007-12-11

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.)

80	ground-water level
66	geographic information systems (GIS)
59	earthquakes
37	volcanoes
28	acid deposition
24	tectonic processes
21	sedimentation
20	human impacts
20	earthquake occurrences
19	landslides
18	climate change
18	earth structure
18	erosion
17	water quality
15	desert ecosystems
14	contamination and pollution
13	endangered species
13	global warming
13	floods
12	energy resources
12	gravitational field (earth)
11	oil resources
10	sediment transport
10	real-time monitoring and reporting
10	river systems
10	animals
10	ground-water flow
10	precipitation (atmospheric)
9	maps and atlases
9	health and disease
9	geologic structure
9	waste treatment and disposal
8	geologic processes
8	producers (organisms)
8	rocks and deposits
8	invasive species
8	geologic history
8	reports
8	USGS Quadrangles
8	streamflow

Science Topics term usage Tuesday, 2007-12-11