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Is Organic Food Worth the Extra Cost?

Taken From: EHP (Environmental Health Perspective):
http://www.ehponline.org/science-ed/2006/pesti.pdf  [PDF]
Editor: Stephanie Nardei

NOTE:

To access this lesson, please go directly to the original website listed above.  It fulfills the exploratory inquiry goals of PULSE in its original form.

Part I (Explore): Doing the Calculation



Time:

50 minutes

Preparation
Time:

10 -15 minutes

Materials:

Calculation Worksheets

Abstract
Students calculate the amount of pesticide residue in various foods for two pesticides and determine if these levels are safe for human consumption
.

Objectives
Students will be able to:

  • Calculate the dose of a pesticide using food intake levels and pesticide residue concentrations
  • Evaluate the safety of food pesticide residue food intake levels and pesticide residue concentrations

National Science Education Standard
Content Standard A – Science as Inquiry

  • Identify questions and concepts that guide scientific investigations
  • Formulate and revise scientific explanations and models using logic and evidence
  • Communicate and defend a scientific argument

Content Standard F- Science in Personal and Social Perspectives
Personal and community health

Arizona Science Education Standards:
Concept 1: Observations, Questions, and Hypotheses

  • PO 2. Develop questions from observations that transition into testable hypotheses.
  • PO 3. Formulate a testable hypothesis.

Concept 2: Scientific Testing (Investigating and Modeling)

  • PO 1. Demonstrate safe and ethical procedures (e.g., use and care of technology, materials, organisms) and behavior in all science inquiry.
  • PO 5. Record observations, notes, sketches, questions, and ideas using tools such as journals, charts, graphs, and computers.

Concept 3: Analysis, Conclusions, and Refinements

  • PO 2. Evaluate whether investigational data support or do not support the proposed hypothesis.

Concept 4: Communication

  • PO 2. Produce graphs that communicate data. (See MHS-S2C1-02)
  • PO 3. Communicate results clearly and logically.
  • PO 4. Support conclusions with logical scientific arguments.

Arizona Math Education Standards:
Math Strand 2 - Data Analysis, Probability, & Discrete Mathematics
Concept 1: Data Analysis (Statistics)

  • PO 1. Formulate questions to collect data in contextual situations.
  • PO 2.  Organize collected data into an appropriate graphical representation.
  • PO 3. Display data as lists, tables, matrices, and plots
Strand 5: Structure & Logic
Concept 1: Algorithms and Algorithmic Thinking

Teacher Background
None.

Related and Resource Websites
PULSE Resource Page on GE Foods: http://pulse.pharmacy.arizona.edu/resources/dawn_new/teachers.htm

   


PULSE is a project of the Community Outreach and Education Program of the Southwest Environmental Health Sciences Center and is funded by:


an
NIH/NCRR award #16260-01A1
The Community Outreach and Education Program is part of the Southwest Environmental Health Sciences Center: an NIEHS Award

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Supported by NIEHS grant # ES06694


1996-2007, The University of Arizona
Last update: March 7, 2007
  Page Content: Rachel Hughes
Web Master: Travis Biazo