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Organically Grown? (Testing for Simulated Pesticide Residue)

Kit #321
Organically Grown? (Testing for Simulated Pesticide Residue)

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.

Details at a Glance

  • 1-2 Days | 1-2 ~50 minute class periods
  • 1 Activity
  • Accommodates 2 classes, each with 8 groups of 4 students
  • Consumables service 64 students
  • Meets our criteria for supporting literacy
  • Requires a water source

Scientific Concepts

• Pesticides are used in production agriculture.
• Organic production uses several classes of pesticides approved by the USDA.
• All pesticides must be approved by the USDA.
KEY VOCABULARY: pesticide, certified organically produced

Guides & Student Sheets

Our kits and modules provide you with everything you need so you can open, review, and teach the material confidently the next day.

  • Full downloadable Teacher Guide with background information, detailed instruction, example data and answers
  • Downloadable Student Sheets with age appropriate background information, full procedure(s), and analysis questions
  • All materials necessary to carry out the investigation
  • Safety Data Sheets

Kit Components

  • 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