Science Topics term usage 2007-10-21

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.)

45	earthquakes
43	geographic information systems (GIS)
34	volcanoes
24	stream-gage measurement
20	mosses
19	earthquake occurrences
19	acid deposition
15	desert ecosystems
15	earth structure
13	plants (organisms)
12	climate change
12	precipitation (atmospheric)
12	contamination and pollution
11	human impacts
11	geologic history
11	hurricanes
11	land surface characteristics
10	droughts
10	magnetic field (earth)
10	ground-water flow
10	streamflow
10	tsunamis
10	crust (earth)
10	global change
9	landslides
9	natural gas resources
9	erosion
9	fires
9	industrial pollution
9	ground water
8	health and disease
8	rocks and deposits
8	land use change
8	sediment transport
8	free-air anomaly
8	global warming
8	mathematical modeling
8	tectonic processes
8	floods
8	impact cratering

Science Topics term usage Sunday, 2007-10-21