USGS - science for a changing world

Science Topics

Science Topics term usage Sunday, 2007-06-10

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

Scripts used

991science
116kwic
29combine

Browse terms chosen

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

49geographic information systems (GIS)
37earthquakes
23atomic emission spectroscopy
19volcanoes
16earth structure
9acid deposition
9geologic structure
9climate change
8gravitational field (earth)
8mineral resources
8estuarine ecosystems
8desert ecosystems
8rocks and deposits
8earthquake occurrences
8energy resources
7water resources
7aquatic ecosystems
7maps and atlases
7natural resource extraction
6geography
6river systems
6freshwater ecosystems
6map coordinate systems
6oil resources
6animals
5streamflow
5ecology
5global change
5information system design and development
5land surface characteristics
5crust (earth)
5natural gas resources
5global warming
5tectonic processes
5chemical analysis
5geologic history
5contamination and pollution
5surface water (non-marine)
4remote sensing
4water supply and demand

KWIC index letters chosen

bar graph showing usage of each letter

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Page Last Modified: Friday, 25-Apr-2008 17:34:57 EDT