Tree, How Old Are You?

How can we find out how old a tree is? When a tree is cut down scientists count its annual growth rings to estimate its age. But what if the tree is still alive? In this activity, you will learn how to estimate a tree’s age without harming it.


Idea Sheets are cross-referenced to subjects listed in the Common Core, Next Generation Science Standards, and California Content Standards.

Categories include:
  • Life Science
  • Grades 6-8
  • Science
  • Math
Tags: Geometry, Structure & Function, Biodiversity, Measurement & Data
Grades covered: Grades 6–8
Topics: Measurement, Estimation, Circumference, Life Science, Engineering

Video Demo

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