Experimental Design Diagram
- Does leaf color change on a tree vary by distance from a body of water?
- If a tree is closer to a body of water, then the leaf color change will be less than the change of one further from a body of water because the tree has more nutrients and will be able to sustain it’s leaf growth and color for a longer time.
Leaf Color Depends on Distance from Stream
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Graph |
1. Distance from stream
Controlled Variables:
2. Amount of time between visits
3. Type of tree
4. Size of tree
5. Time of day
- Camera
- Daylight
- Proper footwear
- Computer equipped with Adobe Photoshop.
- Procedure: First, make sure a week has passed since the last visit. Secondly, wear tennis shoes or boots. Next, walk to the research location in daylight. Find the first tree marked with an orange ribbon (it should be on the very edge of the creek). Observe the color of the leaves, and take two photographs: The first of one branch’s leaves, and the second of the tree in it’s entirety. Continue approximately nine yards back from the water to the next marked tree. Repeat the process for that tree and the two that follow. Find a color that is consistent in the leaves in every one of your photos. This will be your base color. Take these eight photos and add them to your computer. Open them in Photoshop. Go to Photoshop preferences in the top left and Guides, Grids, Slices, etc. Make your color grid black with a gridline every tenth of the way across the picture. Set subdivisions to one. Click on View, then Show Grid. The picture will now have a grid on it. Use this to look for how many sections have the base color you gathered in your first visit. Repeat one week from your visit until time is up or there is no longer any of your base color left in any of the trees.