Understanding
Allometry: Not A Llama Tree, but Allometry
Purpose
To introduce the concept of allometry, a method for calculating tree biomass, using a simple measurement such as circumference or diameter.
Overview
In this activity students will measure the height, foot length and arm span of other students in the class and graph them in relation to one another to recognize how allometry can be used to estimate the size of one part of a living thing if another part size is known. Students will then apply their understanding of allometry to the study of biomass and carbon storage in trees.
Essential Questions
How is allometry used to calculate forest biomass?
Sub-Questions
How are allometric equations developed?
How are allometric equations developed?
Student Outcomes
- Students will develop an allometric equation for human height by measuring each other for height, foot length and arm span.
- Students will validate the human allometric equation(s) by determining the heights of individuals not used in the equation development.
- Students will relate human allometry to tree allometry.
- Students will understand why allometric equations are different for different groups of tree species.
Science Concepts
5-8 & 9-12
Change, constancy, measurement
Form and function
Abilities necessary to do scientific inquiry
5-8
Diversity and adaptation of organisms
Time
60 - 90 minutes
Level
Middle & High School