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14 Νοε 2019 · Biology Resources for Teachers provides a great example and explanation of a simple dichotomous key. Most dichotomous keys focus on one specific trait to lead the user to an answer, like leaf patterns on stems or fin shape of fish species.
Students sometimes struggle to make a dichotomous key on their own. Creating one together as a class can be very helpful. This activity takes the fun one step further by actually using classmates as the subject of the Key itself! First, show students a simple dichotomous key, and explain how it works. I use something like this –
define a dichotomous key as a series of paired choices or descriptions, outline the purpose of a dichotomous key as a method of classifying organisms by physical appearance, use and design a simple dichotomous key to identify organisms.
Dichotomous Keys (6.1) Alien Worksheet Video Clips. Interactive Activities. IntoScience --> Activities --> Classification of organisms --> Reasons for classifying.
Here are some activities you can use to teach dichotomous keys: 1. I begin by using a powerpoint that teaches students how dichotomous keys work. You can find it here. 2. Ready to practice? Here is a mollusk activity from Cornell.
MAKING A DICHOTOMOUS KEY. Example: Here are two examples of keys to show how to key out organisms, such as a kangaroo, a cow, a bee and a spider. Shown are a branching key and a numbered key. Pouch present (Kangaroo)
Use this dichotomous key worksheet to teach your students about the dichotomous key, which your students can then use to identify different living things.
