Science Topics term usage 2008-01-10

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.)

86	volcanoes
78	earthquakes
67	geographic information systems (GIS)
53	radiometric dating
32	earthquake occurrences
31	water quality
29	glaciology
29	acid deposition
20	rocks and deposits
19	health and disease
19	earth structure
19	desert ecosystems
18	volcanic activity
18	animals
17	drainage basins
17	contamination and pollution
17	tectonic processes
17	water chemistry
16	ground water
16	aerial photography
15	land use and land cover
15	snow and ice cover
15	climate change
14	sediment transport
14	river systems
14	endangered species
14	maps and atlases
14	ground-water flow
14	erosion
13	volcanic eruption prediction
13	water properties
13	mathematical modeling
13	ecosystems
13	natural gas resources
13	droughts
13	human impacts
13	geologic history
13	tsunamis
12	core (earth)
12	mantle (earth)

Science Topics term usage Thursday, 2008-01-10