Biological Sciences

National Map Corps: 

https://nationalmap.gov/TheNationalMapCorps/

ScienceCache

https://www.usgs.gov/centers/norock/science-cache?qt-science_center_objects=0#qt-science_center_objects

Did you feel it? (Earthquakes)

http://earthquake.usgs.gov/earthquakes/dyfi

Did you see it? (Landslides)  

http://landslides.usgs.gov/dysi/

NetQuakes
http://earthquake.usgs.gov/monitoring/netquakes/

Native Bee Inventory and Monitoring

https://www.usgs.gov/centers/pwrc/science/native-bee-inventory-and-monitoring-lab?qt-science_center_objects=0#qt-science_center_objects

Volunteer Repeat Photography

https://www.usgs.gov/centers/norock/science/citizen-science-repeating-historic-photographs-glaciers-glacier-national-park?qt-science_center_objects=0#qt-science_center_objects

USA National Phenology Network
http://www.usanpn.org/participate/

Invasive Plant Atlas of New England
http://www.eddmaps.org/ipane/

Project BudBurst

http://neoninc.org/budburst/

The North American Breeding Bird Survey
https://www.usgs.gov/centers/pwrc/science/north-american-breeding-bird-survey?qt-science_center_objects=0#qt-science_center_objects

World Water Monitoring Challenge
http://www.worldwatermonitoringday.org/

Volunteer Search: https://www.volunteer.gov/

Example Volunteer search in New Jersey: https://www.volunteer.gov/results.cfm?states=NJ