Science Topics term usage 2007-02-17

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.)

51	geographic information systems (GIS)
37	earthquakes
34	volcanoes
20	anatomy and physiology
15	earthquake occurrences
9	climate change
9	ground water
9	gas hydrate resources
9	mineral resources
9	magnetic field (earth)
9	earth structure
8	tectonic processes
8	land use and land cover
8	acid deposition
8	rocks and deposits
8	tsunamis
8	drainage basins
8	river systems
8	isotopic analysis
7	industrial pollution
7	streamflow
7	hurricanes
6	map coordinate systems
6	mathematical modeling
5	igneous rocks
5	endangered species
5	global warming
5	oil resources
5	volcanology
5	contamination and pollution
5	aerial photography
5	snow and ice cover
5	landslides
4	fires
4	natural resources
4	fracture (geologic)
4	lakes
4	Alaska
4	geochemistry
4	gravitational field (earth)

Science Topics term usage Saturday, 2007-02-17