Inquiry Project Sites

Hours of Daylight
http://aa.usno.navy.mil/data/

Rain, Snow, Temperature, Wind, Pressure
http://www.ncdc.noaa.gov/oa/mppsearch.html

Percentage of Surface Covered by Snow/Ice
http://gis.ncdc.noaa.gov/website/ims-climatls/index.html

 or

http://nsidc.org/data/nsidc-0046.html

Archive at
http://www.ssd.noaa.gov/PS/SNOW/

Or
http://www.ncdc.noaa.gov/ussc/pagemap.html

Temperature
http://www.temperatureworld.com/
  or
http://gis.ncdc.noaa.gov/website/ims-climatls/index.html
 and you can draw boxes to zoon

Pollution
Map Archives at http://airnow.gov/

CO2
http://www.cmdl.noaa.gov/ccgg/iadv/

Ozone (03)
http://www.ozonelayer.noaa.gov/data/data.htm

Cloud Cover
http://gis.ncdc.noaa.gov/website/ims-climatls/index.html
  and select OTHER

Plant/Vegetation Coverage
http://gisdata.usgs.net/website/ivm/viewer.php

Rainfall
http://hdsc.nws.noaa.gov/hdsc/pfds/index.html


River Levels
http://water.usgs.gov/waterwatch/

Wind Patterns
River Water Levels or Volume
 
Lightning
http://thunder.nsstc.nasa.gov/lightning-cgi-bin/lis/LISSearch.pl?type=HTML?

Earthquakes
http://earthquake.usgs.gov/eqcenter/

Volcanoes
http://volcanoes.usgs.gov/update.html

Human Population
http://www.census.gov/

Traffic Congestion
http://www.stolasgeospatial.com/traffic.html

Sea Level Rising from Global Warming
http://flood.firetree.net/

NASA Images from Space
http://earth.jsc.nasa.gov/sseop/efs/categories.htm

Great Meta Collection of Real-Time Weather Data
http://www.weatherimages.org/index.html (include index.html on this address)

And of course, Google Mash-Ups
http://googlemapsmania.blogspot.com/#top   (check out right hand column)