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Activity

Baby shells

Summary: 
Observe the size differences between young and old shelled animals.
Science content (2016 curriculum): 
Biology: Features, Adaptations of Living Things (K, 1, 3, 7)
Biology: Life Cycles (2)
Lessons activity is in: 
Materials: 
  • whelk egg case (or other baby shelled marine animals)
  • scissors to cut open egg case
  • box magnifier for each student
  • clear tape
Procedure: 

Students are shown a marine snail egg case (e.g. knobbed whelk egg case containing tiny shells), found washed up on a beach (information and images).
An adult cuts baby shells out of the egg case. One shell is put in each student’s box magnifier.
Discussion of the shell shape: spiral, unlike the clams (and mussels) we have looked at before.
Students draw the spiral shell, filling a page of their notebook, to be as large as an adult shell. Tape the baby shell next to the adult, to compare the enormous size difference between baby and adult shells of this type.

Grades taught: 
Gr 1
Gr 2
Teacher: 
Diane Merchant
Ingrid
Julie Kawaguchi
Teaching site: 
Weir Elementary
Activity originally developed and delivered: 

Scientist in Residence Program, Vancouver School District with teachers Ms. Kawaguchi and Ms. Merchant.
http://scientistinresidence.ca/
This activity is part of the Scientist in Residence lesson plan http://www.scientistinresidence.ca/pdf/life-science/Discovering%20Life%2...