Annual Growth (Science Experiments)
Lichens: another kind of annual growth
Tree Growth: What can be learned from the growth patterns of trees?
Design Your Own Experiment
Did you ever measure your height to see how much taller you were than the year before? This change is your annual growth. In humans, annual growth depends on factors such as your age (babies grow at a faster rate than teenagers) and your (which make sure your growth pattern is similar to that of your parents and grandparents). How can we determine the annual growth of other organisms, and what factors can we find that affect their growth?
Trees are probably the tallest living organisms you will see in your life. Yet most trees around you grew from seeds no larger than the eraser on a pencil. The process by which these tiny seeds become trees is fascinating and easy to observe, when you know what to look for.
A tree grows in two ways. The tips of its branches and tips of its roots contain cells that reproduce, making the tree taller and its roots deeper. Another layer of dividing cells increases the width...
(The entire section is 3583 words.)
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