Science Topics term usage 2006-10-26

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.)

126	earthquakes
105	volcanoes
67	geographic information systems (GIS)
38	radiometric dating
29	earthquake occurrences
24	tectonic processes
22	acid deposition
21	mineral resources
21	earth structure
20	ground water
17	floods
17	rocks and deposits
17	oil resources
16	contamination and pollution
16	land use and land cover
15	animals
15	energy resources
15	climate change
15	water quality
15	water sampling
15	tsunamis
14	sea-floor characteristics
14	coastal zones
13	surface water (non-marine)
13	water supply and demand
12	human impacts
12	streamflow
11	droughts
11	water resources
11	maps and atlases
11	ground-water flow
11	water use
11	nonvascular plants
10	ocean characteristics
10	plants (organisms)
10	aerial photography
10	landslides
9	sedimentation
9	water chemistry
9	geochemistry

Science Topics term usage Thursday, 2006-10-26