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Green Down in the Callery Pear Tree and Ginko Tree
Transcript of Green Down in the Callery Pear Tree and Ginko Tree
What is this Green Down?
How will we find out?
What can we conclude and where can we go from here?
What really happens?
There is less sunlight
Chlorophyll begins to disappear
Leaves change colors
Leaves fall to the ground
Does it look different in different trees?
Do leaves on the ginkgo tree fall later than leaves on the callery pear tree?
Hypothesis: The leaves on the ginkgo tree fall later than the leaves on the callery pear tree.
We studied four trees, two each.
The trees were all on the same street, Amsterdam Avenue between 137th and 138th.
We observed them twice a week and then three times when changes began.
We collected data on data tables and graphed number of days each leaf took to fall from the branch.
Callery pear tree loses its leaves earlier than the ginkgo tree.
Callery pear has a wider variety of leaf color.
Callery pear loses its leaves gradually while the ginkgo "rains".
Do leaves on the callery pear go through a wider variety of color change than leaves on the ginkgo tree?
Do leaves on the ginkgo tree change color faster than the leaves on the callery pear tree?
Are leaves on the ginkgo tree more susceptible to being affected by malicious acts than leaves on the callery pear?
Although the ginkgo tree falls significantly later, it falls rapidly.
Data collected and analyzed support our hypothesis.
Different trees experience leaf fall at different times during autumn.
Table Showing Color Changes and Leaf Fall Time in the callery pear tree A.
Leaf Fall in both trees
Callery Pear A
Any Questions or Comments???
Strengths and Weaknesses
There were two samples of each tree.
Data was collected by different observers and at different intervals
Observation dates fluctuated/Not as planned
Small sample size
External forces (human and natural
callery pear B
Table Showing Color Changes and Leaf Fall Time in the ginkgo tree A.
Table Showing Color Changes and Leaf Fall Time in the callery pear tree B.
Table Showing Color Changes and Leaf Fall Time in the ginkgo tree B.
By: Alicia and Karlisha.