Mollusk Dichotomous Key

In this lab, students will be introduced to the concept of a dichotomous key through the use of preliminary activities modeled by the teacher. They will then learn about the ecology and biology of selected marine mollusks, before putting their dichotomous key reading skills to the test on 8 or 12 corresponding seashells. Finally, students demonstrate their new knowledge by creating their own dichotomous key to classify even more shells.


Mollusk Dichotomous Key Teacher Edition (CIBT)

Student Handout 1, Dichotomous Key Lab (CIBT)

Student Handout 2, Mollusk Introduction Lab (CIBT)

Specimens 1-8 

Specimens 1-12 (legal size)

Teacher Guide for Shells 

Animal Pic Sheets

Animal Pic Citations

Marine Mollusks Dichotomous Key 1-8 

Marine Mollusks Dichotomous Key 1-12 

Pasta Types Handout

Shell Info Cards