This complete "dry lab" activity contains all required materials. Dichotomous keys are also used for identifying and classifying new species. A key gives pairs of either-or choices that direct the user to the next pair of choices (also known as a couplet) or to the point of identification. Design and test your own dichotomous key to identify a collection of plastic lizards. Dichotomous keys are used to identify a variety of things including insects, plants, animals and rocks.
Use a dichotomous key to identify a collection of plastic frogs. Science Take-Out® What Is It? Dichotomous Keys Students will create their own key by using observation and clear descriptors in order to accurately categorize and identify seeds. Introduce your students to the dichotomous key. Ward's Constructing a Dichotomous Key Lab Activity Learn more by downloading the activity plan above. This activity is great for classes of all different sizes and will be sure to have your students involved in the fun. Using common classroom materials, this lab instructs students to identify items that are not like the others and then follow a special key to determine their secret names. Teach your middle school biology students all about dichotomous keys with this easy, interactive lab idea. Texas TEKS: 7.11A: Examine organisms or their structures such as insects or leaves and use dichotomous keys for identification. Apply scientific ideas to construct an explanation for the anatomical similarities and differences among modern organisms and between modern and fossil organisms to infer evolutionary relationships.
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