Science Topics term usage 2007-04-01

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.)

61	geographic information systems (GIS)
55	earthquakes
37	sedimentary rocks
33	volcanoes
26	earthquake occurrences
14	remote sensing
13	rocks and deposits
12	sedimentology
11	tsunamis
11	human impacts
11	ground water
10	mineral resources
9	earth structure
9	water use
9	acid deposition
8	tectonic processes
8	ground-water flow
8	sedimentation
8	geologic history
8	sediment transport
7	surface water (non-marine)
7	endangered species
7	water properties
6	water quality
6	invasive species
6	hurricanes
6	biogeography
6	grassland ecosystems
6	hazards
5	igneous rocks
5	snow and ice cover
5	animals
5	industrial pollution
5	gravitational field (earth)
5	metallic ores
5	seismic methods
5	nutrient content (water)
5	global warming
5	gold ores
5	glaciation

Science Topics term usage Sunday, 2007-04-01