     |
|
Common Trees of S.Eastern Pennsylvania.
Home
"Pennsylvania" (Latin for "Penn's Woods"). Pennsylvania's location spanning 40 degrees - 42 degrees north latitude and its varied terrain support 108 species of native trees and many other introduced from Europe and Asia. Trees provide a renewable source of lumber, paper, nuts and chemicals. But they are also essential as living filters, removing pollution from the air we breath and the water we drink. Trees provide homes and food for wildlife, and beautify our homes with comforting shade in summer and shelter from winter winds. With wise management, forests can produce these benefits for future generations as they have in the past.
If you cut a tree down, please replace it.....
Towards the middle of the page is the index to the photos...Not all pictures have been up-loaded..but will be soon. Keep checking back.
Leaves: A chemical compound in leaves called chlorophyll strongly absorbs radiation in the red and blue wavelengths but reflects green wavelengths. Leaves appear "greenest" to us in the summer, when chlorophyll content is at its maximum. In autumn, there is less chlorophyll in the leaves, so there is less absorption and proportionately more reflection of the red wavelengths, making the leaves appear red or yellow (yellow is a combination of red and green wavelengths). The internal structure of healthy leaves act as excellent diffuse reflectors of near-infrared wavelengths. If our eyes were sensitive to near-infrared, trees would appear extremely bright to us at these wavelengths. In fact, measuring and monitoring the near-IR reflectance is one way that scientists can determine how healthy (or unhealthy) vegetation may be.
Water: Longer wavelength visible and near infrared radiation is absorbed more by water than shorter visible wavelengths. Thus water typically looks blue or blue-green due to stronger reflectance at these shorter wavelengths, and darker if viewed at red or near infrared wavelengths. If there is suspended sediment present in the upper layers of the water body, then this will allow better reflectivity and a brighter appearance of the water. The apparent colour of the water will show a slight shift to longer wavelengths. Suspended sediment (S) can be easily confused with shallow (but clear) water, since these two phenomena appear very similar. Chlorophyll in algae absorbs more of the blue wavelengths and reflects the green, making the water appear more green in colour when algae is present. The topography of the water surface (rough, smooth, floating materials, etc.) can also lead to complications for water-related interpretation due to potential problems of specular reflection and other influences on colour and brightness.
Wide and Flat:
Helpful Sites: http://www.scsc.k12.ar.us/GarrettT/lesson.htm-lesson plan
http://www.nationalgeographic.com/coloringbook/butterflies.html http://www.kidsturncentral.com/-For fun
Can anyone tell me what this is? Discription: Butterfly-like bee or related to the hummingbird? e-mail me at ramagej@hotmail.com
"An Instant Guide to Trees" "Wild Flowers" "Field Book Of American Wild Flowers"
http://www.adobe.com/products/acrobat/readstep2.html
Pictures and Information can be found in the Photos section.
INDEX:
TREES AND LEAVES:
Cucumbertree Magnolia Osage Orange (Monkey Ball Tree) American Birch
PINES AND NEEDLES:
Eastern Hemlock
Today in History!
MORE TO COME......NEW SITE.......................
  
Enter your website below to gain more traffic.
Search Engine Submitter
|
Common Trees of S. Eastern
Pennsylvania.
BOOK TALK 
