Science Topics term usage 2007-03-26

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.)

128	volcanoes
117	earthquakes
116	geographic information systems (GIS)
91	earth characteristics
87	global warming
35	earthquake occurrences
30	earth structure
27	ocean temperature
26	climate change
26	rocks and deposits
25	human impacts
25	acid deposition
21	geologic history
20	tectonic processes
20	maps and atlases
20	geologic structure
19	ground water
19	aerial photography
19	volcanic activity
19	tsunamis
18	contamination and pollution
17	floods
16	energy resources
16	map coordinate systems
16	water quality
15	gravitational field (earth)
14	global change
14	ground-water flow
14	mineral resources
14	hurricanes
14	surface water (non-marine)
14	glaciation
14	erosion
14	invasive species
13	streamflow
12	magnetic field (earth)
12	water use
12	freshwater ecosystems
11	fires
11	endangered species

Science Topics term usage Monday, 2007-03-26