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By the end of this lesson the student should be able to:

  • Identify the rules for food safety
  • Identify sources of food-borne illnesses and contaminants

Lesson Description

This lesson identifies major sources of food and water-borne illnesses and contaminants and recommends strategies for avoiding exposure to such.  The emphasis of the lesson is to help students adopt habits that will help them minimize their risk to exposure to these environmental hazards.  Please note that parasites and pesticides are not covered in this lesson although they too may be introduced to the body through the digestive system.  Since most environmental hazards enter the body through multiple routes, lines of classification are sometimes blurred. Parasites and pesticides will be covered in subsequent lessons.


There is a pre-test and a post-test for each lesson which must be printed before they are administered. Click here for the key to both tests.

Activities and Assignments

After students have read the lesson, have them work individually or in small groups on the "Slime Sleuths at Toxic Island" activity.   The activity is a mystery game where students will be asked to find out what toxic substance made the patient sick and the source of the substance.  Reading time for each lesson will vary, however, each "Slime Sleuth" activity should not take more than 20 minutes.  There is a different "Slime Sleuth" activity for each lesson, however, to encourage problem solving, the problem presented in the activity may or may not be related to the information in the lesson.  Each computer used for the lesson activity will need an Authorware web player plug-in. Click here for the plug-in.

Standards Targeted

The Texas Middle School Science and Technology Standards targeted in this lesson can be found by clicking here.

Introduction | Pre-Test | Lesson | Activity | Post-Test
PEER Curriculum | Toxic or Not Modules | Teacher's Pages | Standards