Why do we use dichotomous keys? They are an identification and classification tool. If you are looking at a plant in your backyard and want to identify it and it’s scientific name, we use a dichotomous key.
Dichotomous keys are fun for students and they get the hang of them quickly.
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.
4. Generally we use dichotomous keys in biology, but they can be used for other things too! Here is a cloud identification dichotomous key from NASA.