Forest

=How Many Leaves Are in the Forest? Sampling Investigation= (This investigation begins in early fall and ends in late fall.)



__Question__: How many leaves are on the plants in the Ayer Forest?
===__Research/Think Time__: In September, students hiked through the Ayer Forest to observe first-hand the magnitude of the leaves present on the trees. They were then asked to brainstorm strategies for counting these leaves. The most common responses were some form of estimation and multiplication (i.e., estimate the number of leaves on a tree, estimate the number of trees, then multiply). On Google Earth we located an aerial view of the Ayer Forest. Using the ruler feature on Google Earth, we measured and found that the Ayer Forest is 120 meters deep and 160 meters wide (19,200 square meters). Through rounding and estimating, we calculated that every 100 leaves in a square meter equals about 2,000,000 leaves in the entire forest (100 leaves x 20,000 square meters).===

===__Procedure__: In September, students worked in teams to identify and count the leaves in ONE square meter that are currently on the forest floor. A photo was taken of each site. We will return to these locations later in the fall to count leaves and complete the experiment.===

__Hypothesis__: I think the number of leaves on the plants in the Ayer Forest will be...

 * ===1,000,000 or fewer-FOUR===
 * ===1,000,000 to 10,000,000-SEVENTY NINE===
 * ===More than 10,000,000-TEN===

===__Data__: The chart below shows the actual number of leaves counted in a square meter in September (summer) and again in November (late fall). This data will be averaged to estimate the number of leaves that were on the Ayer Forest plants just prior to fall.=== 373 leaves November= 1,001 leaves || September = 495 leaves November= 1,040 leaves || September = 426 leaves November= 1,217 leaves || September = 495 leaves November= 1,229 leaves || September = 317 leaves November= 832 leaves || September = 648 leaves November= 886 leaves || ** September average = **
 * || Team 1 || Team 2 || Team 3 || Team 4 || Team 5 || Team 6 || Average ||
 * Parobek || September =
 * November average =**

705 leaves November= 1,845 leaves || September = 618 leaves November= 1,563 leaves || September = 580 leaves November= 1,332 leaves || September = 741 leaves November= 962 leaves || September 770 leaves November= 678 leaves || September = 699 leaves November = 1,428 leaves || **September average =**
 * AVERAGE NUMBER of FALLEN**
 * LEAVES from SEPTEMBER to DECEMBER =** ||
 * Farmer || September =
 * November average =**

626 leaves November= 1,670 leaves || September = 109 leaves November= 1,081 leaves || September = 830 leaves November= 2,366 leaves || September = 267 leaves November= 1,563 leaves || September = 432 leaves November= 1,104 leaves || September = 203 leaves November= 587 leaves || **September average =**
 * AVERAGE NUMBER of FALLEN**
 * LEAVES from SEPTEMBER to DECEMBER =** ||
 * Vincent || September =
 * November average =**

483 leaves November = 1,302 leaves || September = 281 leaves November= 715 leaves || September = 325 leaves November= 948 leaves || September = 438 leaves November= 1,020 leaves || September = 353 leaves November= 920 leaves || September = 474 leaves November= 1,390 leaves || **September average =**
 * AVERAGE NUMBER of FALLEN**
 * LEAVES from SEPTEMBER to DECEMBER =** ||
 * Maher || September =
 * November average =**


 * AVERAGE NUMBER of FALLEN**
 * LEAVES from SEPTEMBER to DECEMBER =** ||

First, we multiply the Average Fallen Leaves for each class (for one square meter) by 19,200 m2 (the area of the entire forest).
PAROBEK-- __x 19,200 = _ leaves!__ __FARMER--__ x 19,200 = _ leaves! VINCENT-- __x 19,200 = _ leaves!__ __MAHER--__ x 19,200 = _ leaves!

__Conclusion and Discussion__...DRUMROLL PLEASE !!!!
=APPROXIMATELY _ LEAVES FELL FROM THE AYER FOREST TREES THIS FALL!!! WEE HOO!!!=