Curated OER
Seasonal Cycles And Changes
Second graders recall the affect of direct and angled sunlight on the seasons, describe some results of warming soil and air in spring, predict the changes in buds when twigs are placed in water, and taste a product of tree sap and...
![Dcnr: Common Trees of Pennsylvania [Pdf] Handout](https://d15y2dacu3jp90.cloudfront.net/images/attachment_defaults/resource/large/FPO-knovation.png "Dcnr: Common Trees of Pennsylvania [Pdf] Handout")
Other
Dcnr: Common Trees of Pennsylvania [Pdf]
A list of common trees in Pennsylvania, as well as specific information on each tree.
Harvard University
The Arnold Arboretum of Harvard University
This site contains general information about The Arnold Arboretum of Harvard University in Boston, Massachusetts. The site also gives a selection of links that tell more about the garden.