BACKGROUND:
A tree and a flower are different.
The word tree refers to the complete plant whereas a flower is only an
organ
of a plant. Some trees produce flowers (angiosperms, i.e., maple) and some do not
(gymnosperms, i.e., pine). Flowers are usually grouped together on a stem and are adapted
for sexual reproduction. The flower is not an entire plant but an organ formed by
some plants for reproductive purposes.
PROCEDURE:
- Go over the parts of a flower.
- stamen = the pollen producing organ of a flower
consisting of a long filament and an anther
- petal = usually brightly colored with a distinct odor which serves to
attract insects for cross-pollination (the transfer of pollen from one plant
to another of the same type)
- pistil = the seed-bearing female reproductive organ
- sepal = one of the green segments forming the outer protective covering
of a flower
- Go over the parts of a tree, which is a
complete plant with many specialized organs and tissues. The picture on the
worksheet represents a cross section of the woody tissue.
- bark = the wood covering of roots, stems and
main trunks of trees and other wood plants
- phloem = the pathways through which food material is conducted throughout
the plant (moves food)
- pith = the soft central portion of the branches and stems of plants
- annual growth rings = alternative light and dark concentric rings in tree
branches and stems due to periods of growth between summer and winter
- xylem = the pathways through which water is conducted throughout the
plant
- Go outside or bring flowers and
parts of trees inside and have the students determine parts of a tree and
flower.
