Science Topics term usage 2008-01-30

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.)

65	earthquakes
61	geographic information systems (GIS)
44	chemical elements
43	volcanoes
29	rocks and deposits
28	global warming
27	climate change
26	human impacts
25	earthquake occurrences
22	geologic history
19	earth structure
18	tectonic processes
17	animals
17	acid deposition
17	image collections
17	floods
16	invasive species
16	tsunamis
15	water quality
15	aquatic ecosystems
15	scientific careers
15	mineral resources
14	erosion
14	endangered species
13	energy resources
13	ground water
12	oil resources
12	surface water (non-marine)
12	stream-gage measurement
12	ground-water flow
12	marine geology
12	streamflow
12	land use and land cover
11	water resources
11	contamination and pollution
11	freshwater ecosystems
11	health and disease
11	global change
10	gravitational field (earth)
10	producers (organisms)

Science Topics term usage Wednesday, 2008-01-30