Science Topics term usage 2007-11-08

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.)

72	geographic information systems (GIS)
65	earthquakes
47	offstream water use
41	volcanoes
26	acid deposition
21	energy resources
19	human impacts
19	climate change
19	earthquake occurrences
18	global warming
17	desert ecosystems
17	water supply and demand
16	geologic history
15	tectonic processes
15	contamination and pollution
15	water quality
14	earth structure
13	erosion
12	global change
12	topics
11	oil resources
10	stream-gage measurement
10	real-time monitoring and reporting
10	geologic structure
10	igneous rocks
10	health and disease
10	land surface characteristics
9	invasive species
9	sediment transport
9	hurricanes
9	USGS Quadrangles
9	hydrology
9	surface water (non-marine)
9	mineral resources
9	ground water
9	water properties
8	fires
8	domestic water use
8	ground-water flow
8	ecology

Science Topics term usage Thursday, 2007-11-08