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Become a nitrogen atom in the nitrogen cycle in our Traveling Nitrogen Classroom Activity Kit/Game. See all our games, activity kits and classroom activities.
Two Windows to the Universe employees showing the product of the Frozen Film activity that is listed on the site.
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Bibliography Information

Thank you for visiting Windows to the Universe. Windows to the Universe has been in development since 1995. Over the years, there have been many writers of the pages on the site. Most pages have been worked on by more than one person. Here is a listing of just some of the university faculty, pre-college teachers, university students, scientists, artists, library and museum specialists, and programmers who have contributed to our site over the years.

If you need to cite a page on our internet site in your bibliography for a project, please cite the page source as such:

Windows to the Universe team. Title of Specific Page Used. Boulder, CO: © 2010 National Earth Science Teachers Association, Date of last modification for that page. Online. Available: http://www.windows2universe.org. Date you accessed the page.

This citation follows the basic guidelines of citing electronic resources according to the MLA Handbook. It also includes information on how to cite electronic resources according to the APA Handbook.

As an example, the correct MLA citation for our Biomes and Ecosystems page is:

Windows to the Universe team. Biomes and Ecosystems. Boulder, CO: © National Earth Science Teachers Association, October 3, 2008. Online. Available: http://www.windows2universe.org. .

The correct APA citation for the same page is:

Windows to the Universe team (2008). Biomes and Ecosystems. Retrieved , from http://www.windows2universe.org

If you have any questions concerning citing our internet site, please feel free to contact us through our comments form.

Last modified March 31, 2009 by Becca Hatheway.

Shop Windows to the Universe Science Store!

Our online store includes issues of NESTA's quarterly journal, The Earth Scientist, full of classroom activities on different topics in Earth and space science, as well as books on science education!

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Bibliography Information

Thank you for visiting Windows to the Universe. Windows to the Universe has been in development since 1995. Over the years, there have been many writers of the pages on the site. Most pages have been worked...more

Please Support Windows to the Universe!

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Regular Educator Memberships on Windows to the Universe

The Windows to the Universe team will be offering memberships for all educators by 1 September 2010 which will provide access to new website capabilities and services, as well as access to an ad-free version...more

Windows to the Universe Partnership Opportunities for Education and Outreach

Are you looking for an effective and efficient education and outreach program to supplement your research activities? Are you struggling to reach a significant audience of students, teachers, and the public?...more

Windows to the Universe, a project of the National Earth Science Teachers Association, is sponsored in part by the National Science Foundation and NASA, our Founding Partners (the American Geophysical Union and American Geosciences Institute) as well as through Institutional, Contributing, and Affiliate Partners, individual memberships and generous donors. Thank you for your support! NASA AGU AGI NSF