grass is a physical change.
physical
Leaves falling off a tree. Water evaporating.
its called paint
No. Trees' leaves change colors beacuase when winter comes around, they will not have the energy to keep leaves, so they seal off the leaves from the rest of the tree. When the leaves are cut off from the rest of the tree, the chlorophyll in them dies, and turns brown.
what makes the leaves of a canopy tree change
physical change because chemical changes usually cant be seen
Lemon trees are evergreen and shouldn't lose all of its leaves. The falling of the leaves is likely due to the aging of the tree, and its leaves.
The leaves would change colors and fall off if the tree is a deciduous tree
Breaking off a branch of a tree is a physical change.
If it does not shed it's leaves in Winter it is not an Elm.
It depends why they are falling off. If the tree is deciduous and this happens in the Autumn then there is no problem. If it happens during the growing season it shows a tree under stress and requires further investigation.
senescence.