USGS - science for a changing world

Science Topics

Science Topics term usage Friday, 2008-01-04

This analysis excludes the activity of search-engine spiders, USGS users, and transactions resulting in errors.

Scripts used

1350science
172kwic
122combine

Browse terms chosen

(Table shows only the 40 most frequently chosen terms.)

62geographic information systems (GIS)
37earthquakes
33volcanoes
25plant and animal testing
18earthquake occurrences
17earth structure
16water quality
13acid deposition
13mineral resources
13aerial photography
12contamination and pollution
12dam sites
11water resources
11streamflow
11geologic history
10tectonic processes
10precipitation (atmospheric)
9energy resources
9human impacts
9climate change
9geochemistry
9animals
8river systems
8floods
8erosion
8aquatic ecosystems
7glaciation
7earth characteristics
7impact cratering
7rocks and deposits
7snow and ice cover
7biodiversity
6ocean characteristics
6ground water
6grassland ecosystems
6sea-floor characteristics
6map coordinate systems
6land use and land cover
6biogeography
6ecological processes

KWIC index letters chosen

bar graph showing usage of each letter

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Page Last Modified: Friday, 25-Apr-2008 17:35:00 EDT