Today was our last nature study of 2011. The lesson was all about leaves and the word "chlorophyll". Ms. Cathy read the book "The Leaf Man" before we went on our hike. Each of the girls were to find leaves that were interesting to them and look for one that still had a lot of chlorophyll in it (was still green).
After the hike, we identified each of our leaves while drawing them in our nature study notebook. The girls were supposed to count each of the main veins so we could make a graph for our group.
E
Oak Hydrangea - it had 5 main veins
Dogwood - had 14 main veins
P
Dogwood - 10 main veins
G
Sour Wood or White Ash - 18 veins
Grape Vine - 6 veins
We learned about the different types of leaves. We also learned that when chlorophyll is released from the leaves that is what gives us carbon dioxide.
Chlorophyll has a vital function: that of capturing solar rays and utilizing the resulting energy in the manufacture of the plant's food—simple sugars which are produced from water and carbon dioxide. These sugars are the basis of the plant's nourishment—the sole source of thecarbohydrates needed for growth and development. In their food-manufacturing process, the chlorophylls themselves break down and thus are being continually "used up." During the growing season, however, the plant replenishes the chlorophyll so that the supply remains high and theleaves stay green.
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