How can we find out how old a tree is? - Teacher's Notes

In an educational unit about the age of trees, children are introduced to the concept that trees can live for many years, and there are methods to determine their age. To give the children a hands-on experience, they are encouraged to find a tree that is at least 3 meters tall and use a tape measure to find the circumference at the tree's thickest point. The circumference measurement in inches is a rough estimate of the tree's age. This practical activity aims to make children aware of the longevity of trees and to consider whether a tree might be as old as they are, or perhaps as old as their parents or even grandparents. This approach to learning combines outdoor exploration with mathematical application, sparking curiosity about the natural world and the history of their local environment.

For those seeking greater accuracy in determining the age of a tree, more precise methods are suggested. While the lesson notes do not detail these methods, they likely refer to techniques such as counting the tree's growth rings, which can be seen in a cross-section of the trunk. This activity not only teaches children about the biology of trees and how they grow over time but also encourages them to develop a sense of inquiry about the past and the living organisms that have witnessed it. By comparing the age of trees to the age of familiar people, children can better grasp the concept of time and the growth processes of plants and trees.