Curated OER
How Old is That Tree?
In this age of a tree activity, students use "Tree Cookies" and count the number of rings in each, they determine the age of the tree and they identify any special features and what they may indicate.
Curated OER
Global Change- Time and Cycles
Students study trees and their growth. In this investigative lesson plan students work in groups to reconstruct a 50 year climatic history using a simulated tree ring.