Spring Tracking: https://www.usanpn.org/
Phenology: https://www.ritree.org/2-uncategorised/94-plant-phenology-project
How Old Is That Tree: https://www.cliftonparkopenspaces.org/treecalculator/
Tree Rings: https://www.arborday.org/Trees/ringsLivingForest.cfm
Forestry: https://www.bugwood.org/forestry.cfm
Carbon Sequestering: https://icp.giss.nasa.gov/research/ppa/2001/anwar/
Trees Reduce Erosion: https://sciencing.com/how-can-trees-help-prevent-soil-erosion-12620837.html
Trees Make Oxygen: https://www.sciencefocus.com/planet-earth/how-many-trees-does-it-take-to-produce-oxygen-for-one-person/
Choosing a Tree: https://www.arborday.org/trees/righttreeandplace/
Tree Management: https://northeasterntreecare.com/index.php/tree-services/
Tree I.D./ Printables:
Parts of a leaf: https://twistynoodle.com/parts-of-a-leaf-worksheet/
Math Worksheets:
Leaf Investigation: http://printables.atozteacherstuff.com/download/fall/leaf-investigation.pdf
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