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Links

on line text book
interdependence
Symbiosis

Symbiosis

http://www.ms-starship.com/sciencenew/symbiosis.htm

predator-prey
http://www.arkive.org/predator-prey/

El Nino
Ele Nino
http://www.financialsense.com/contributors/evelyn-browning-garris/economic-consequences-el-nino-north-america

Ocean Currents Webquest
Ocean Currents Webquest
http://oceanservice.noaa.gov/education/tutorial_currents/lessons/currents_tutorial.pdf