Outside covering of a tree
Bark
Dogwood, for example
Tree
Trees produce this gas
Oxygen
Deepest part of the tree
Roots
Plant that is smaller than a tree.
Shrub
Trees that have needles
Conifers
'Seeds' of an oak tree
Acorns
How to tell the age of a tree
Rings
Another name for lumber
Wood
Where photosynthesis occurs
Leaves
Wayne's best arboretum
Laurelwood
What leaves are attached to
Branches
Season when trees lose their leaves
Fall
Largest tree
Sequoia