Science Topics term usage 2007-10-22

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.)

157	topography
66	earthquakes
64	geographic information systems (GIS)
63	volcanoes
28	earthquake occurrences
28	climate change
23	floods
22	earth structure
21	acid deposition
21	fires
20	global warming
20	human impacts
19	tectonic processes
16	contamination and pollution
15	desert ecosystems
15	river systems
15	droughts
14	energy resources
14	tsunamis
14	sea-floor characteristics
13	invasive species
13	water properties
13	surface water (non-marine)
13	animals
12	stream-gage measurement
12	water cycle
12	ocean characteristics
12	land use and land cover
11	aerial photography
11	real-time monitoring and reporting
11	erosion
11	ground water
10	mineral resources
10	topics
10	oil resources
9	ground-water flow
9	impact cratering
9	meteorites
9	glaciation
9	geologic structure

Science Topics term usage Monday, 2007-10-22