Learning With Tree Houses
Plants and Animals
One of the most popular animal that lives in a tree is a robin. A robin has a brownish-grayish bird with a red belly. They usually arrive in spring and stay here through fall.
Photosynthesis and Soil
Soil is a mixture of broken rocks and minerals, living organisms, and decaying organic matter called humus.
Different Types of Forests
Growth Process and Age of Trees
You can make a fairly good estimate of a tree's age using a simple formula published by the International Society of Arboriculture.