This is the answer key to a free worksheet available at https://www.biologycorner.com/worksheets/pepperedmoth.html
This is a new version that uses an HTML 5 simulator at https://askabiologist.asu.edu/peppered-moth
Students read background information and answer questions, then play the role of a bird capturing moths on a tree. They will see that moths that blend in have a higher chance of survival.
A final analysis section asks students to connect the simulation to concepts natural selection and evolution.