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	Main zones of the intertidal zone
Observations	This image set shows the low, middle, and high intertidal zones and discusses the important characteristics of each.
Explanations	The intertidal zone is found where the tides rise and fall daily, alternatively submerging and exposing the shore to ocean water. Organisms must be able to tolerate times of intense sunlight, little moisture, and wave forces.
California Standards	Know organisms depend on their environments Ecosystems
National Standards	Organisms and their environments Populations and ecosystems
Related NSF Exemplary Curriculum	Environments Habitats Ecosystems Investigating ecosystems
Related Records	The bottom intertidal zone The upper intertidal zone View of the rocky intertidal zone in Central California The middle intertidal zone
Creative Commons License	This work is licensed under a Creative Commons Attribution-Share Alike 2.5 License.
Authors	Katie Hale khale92807@aol.com Biological Sciences, CSUF
Publisher	CSUF Jun 08 2007

This material is based upon work that was supported by the National Science Foundation under Grant No. 0127164 to California State University Fullerton. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the National Science Foundation.