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In this investigation, students will use a chemical test in order to determine whether fruit samples have been treated for any simulated pesticides. Based on their test results they grapple with the further question of which sample(s) could potentially be marketed as organic.
75 pieces of dried apple
80 small plastic tasting cups
8 stir sticks
4 dropper bottles of “Pesticide 1” Indicator
4 dropper bottles of “Pesticide 2” Indicator
4 dropper bottles of “Pesticide 3” Indicator
1 60-mL bottle of “Pesticide” Solution A
1 60-mL bottle of “Pesticide” Solution B
1 60-mL bottle of “Pesticide” Solution C
32 Student Guides
1 Teacher's Guide
1 SDS (Safety Data Sheet) packet
Number of groups: maximum 8 groups per class
Number of students: maximum 32 (8 groups of 4 students)
Number of classes: sufficient materials for 2 classes