Science Topics term usage 2007-04-06

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.)

82	geographic information systems (GIS)
64	earthquakes
31	volcanoes
28	bridges
19	acid deposition
18	earthquake occurrences
16	remote sensing
15	geologic history
15	erosion
15	structure contours
14	water quality
14	tectonic processes
13	landslides
13	ground water
13	human impacts
12	land use and land cover
12	laboratory methods
12	wildlife
12	global warming
11	climate change
11	geochemistry
11	endangered species
11	animals
11	ground-water flow
11	surface water (non-marine)
11	contamination and pollution
10	maps and atlases
10	global change
10	tsunamis
10	geologic structure
10	capturing (animals)
10	earth structure
10	oil resources
10	map coordinate systems
10	streamflow
9	water chemistry
9	energy resources
9	ground-water quality
9	field methods
9	floods

Science Topics term usage Friday, 2007-04-06