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Crop Case Files: Dichotomous Keys

Students will explore the connection between weeds and ecosystem stability, practice observing characteristics by using and creating a dichotomous key, and research and present information on noxious weeds.

Grades
6 – 8
Estimated Time
Three to four 45-minute sessions
Updated
December 6, 2022
Seeds under a magnifying glass on a yellow background
Image: NCAL Team

Background

Lesson Activities

Credits

Author

Lyndi Perry, Debra Spielmaker, and Sara Hunt | Utah Agriculture in the Classroom

Standards

National Content Area Standards

  • Science
    • MS-LS2: Ecosystems: Interactions, Energy, and Dynamics
      • MS-LS2-4: Construct an argument supported by empirical evidence that changes to physical or biological components of an ecosystem affect populations.