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Lemons and Onions
(elementary - middle school toxicology activity)

A hands on lesson that helps students understand how to evaluate environmental health problems. Based on the ToxRap curricula and taken from The Case of the Green Feathers. However it was adapted in such a way that it is both educational and entertaining for all grade levels.

Teacher Guides / Student Worksheets
Adobe Acrobat Reader - click to download
(In pdf format.
Requires Adobe Acrobat Reader)
188 kb-download
Lemons and Onions Instructions and Worksheet
Wall Charts
Print out 30' x 40'
Small versions of the wall charts
Print out 8.5' x 11.0'
Hazard Questions
People Questions
ToxRap Map

This activity was presented frequently as a demonstration of basic principles of toxicology.

ToxRAP Network
(The Case of the Green Feathers)

Pharm Camp
(Student Workshop)


Southwest Environmental Health Sciences Center
University of Arizona College of Pharmacy, Room 244
PO Box 210207, Tucson, AZ, USA 85721-0207
Based on the ToxRap, this educational and entertaining activity helps students understand how to evaluate environmental health problems.

Funded by NIEHS grant # ES06694

1996-2004, The University of Arizona
Last update: November 10, 2009
Page Content: Stephanie Nardei
Webmaster: Stephanie Nardei