Essential Question: “Who is best adapted to stay on top of the snow in an arctic environment?” (Adaptation) by Sid Lucas
Students use scientific media to determine the average weight and average surface area of the paws/hooves of various arctic animals. The surface area to mass ratios are compared to quantify and rank how well adapted each animal is with respect to their ability to travel upon a snow covered landscape. Students can apply their discoveries by using their ratios to design the dimensions of a custom snowshoe capable of making them equally adapted to any of the studied animals.
This lesson was designed for students in grades 7 – 12 but can be adapted to younger students.
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Snowshoes Are Mandatory


Developed by: Sid Lucas 

Discipline / Subject: Life Science/STEM 

Topic: Adaptation 

Grade Level: 712 

Resources / References / Materials Teacher Needs: 1) Internet access (Specific web sites and/or articles containing data can be found ahead of time and provided for students if research is not a learning objective for this activity). 2) Calculators 3) Meter Sticks/Measuring tape 4) Large poster board/Construction paper 5) Equation for determining surface area of an ellipse (oval). 

Lesson Summary: Students will answer the question, “Who is best adapted to stay on top of the snow in an arctic environment?” Students use scientific media to determine the average weight and average surface area of the paws/hooves of various arctic animals. The surface area to mass ratios are compared to quantify and rank how well adapted each animal is with respect to their ability to travel upon a snow covered landscape. Students can apply their discoveries by using their ratios to design the dimensions of a custom snowshoe capable of making them equally adapted to any of the studied animals. 

Standard’s Addressed: 1) Use evidence to explain the process by which natural selection leads to adaptations that result in populations dominated by organisms that are anatomically able to survive and/or reproduce in a specific environment. 2) Understand ratio concepts and use ratio reasoning to solve problems. 3) Show how the ideas and themes of science can be used to make reallife decisions about lifestyles and use of resources. 

Learning Objectives: 1) Students can obtain the data necessary to determine surface area to mass ratio of various arctic animals. 2) Students can use data to quantify how well adapted an animal is. 3) Students can apply new understanding to realworld problems. 
Assessment: Method of assessment for learning 1) Checklist for required resources and completed data chart. 2) Check accuracy of ratio calculations and ranking of animals. 3) Check student calculations, measurement, and completion of model snowshoe. 
Procedural Activities
(see link http://math.about.com/od/formulas/ss/surfaceareavol_8.htm ) to design the dimensions of a set of snowshoes necessary to achieve the ratio required to equally adapt the student to one or more of the selected animals.


Materials Students Need: 1) Internet for searching web sites and/or scientific articles (requirements for resources can be adjusted from basic web sites to scientific journals, depending on students’ level of development). 2) Student journal for designing a chart to organize recorded data and calculations. 3) Calculators 4) Meter Sticks/Measuring tape 5) Large poster board/Construction paper 6) Equation for determining surface area of an ellipse (oval).


Technology Utilized to Enhance Learning: Internet 

Modifications for Special Learners/ Enrichment Opportunities Requirements can be altered according to student development. Teacher can determine quantity of information and level of resources needed for diverse learners. Students can work independently or collaboratively. Motivated students can collaborate with Technology Education or work independently to design and create a functional pair of custom snowshoes. 
Photos by Terrie Hanke and Jim Ryder