Science Topics term usage 2007-11-21

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.)

56	geographic information systems (GIS)
48	earthquakes
39	volcanoes
35	AVHRR
23	earth structure
18	bedrock geologic units
16	cartography
15	climate change
14	acid deposition
13	droughts
13	stream-gage measurement
13	tectonic processes
12	land use and land cover
12	earthquake occurrences
12	ecosystems
11	rocks and deposits
11	remote sensing
11	geologic history
10	erosion
10	global warming
10	geologic structure
10	river systems
10	energy resources
9	contamination and pollution
9	sediment transport
8	streamflow
8	human impacts
8	water use
8	mathematical modeling
8	aerial photography
7	oil resources
7	volcanic eruption prediction
7	maps and atlases
7	desert ecosystems
6	hurricanes
6	map coordinate systems
6	habitats
6	water quality
6	infrared imaging
6	methods

Science Topics term usage Wednesday, 2007-11-21