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Why Do Leaves Change Color?

The arrival of fall brings cool new back-to-school clothes, the return of football and hockey and beautiful chameleon leaves. Are trees as fashion conscious as the celebs or is there more to this color change? Kidzworld finds out!

Autumn Leaves - Photosynthesis

Photosynthesis is the process of turning light energy into chemical energy by storing it as sugar. During the spring and summer, trees can make plenty of food because of the long hours of daylight. The process of photosynthesis takes place in the chloroplasts (food making centers), specifically using chlorophyll (the green pigment involved in photosynthesis).

Autumn Leaves - Goodbye Green Trees

During winter, there's not enough water or light for photosynthesis to take place. The trees have to live off the food they stored during the summer. The food-making factories start shutting down and the green chlorophyll disappears from the leaves. When the bright green fades away, the yellow and orange colors - that have always been underneath - begin to show. They've been there all along they've just been covered up by the green chlorophyll. Eventually even those colors fade and the brown leaves start to drop off.

Autumn Leaves - Did U Know?

  • The best places to see vibrant autumn leaves are in the eastern United States and in southeastern Canada.
  • One large tree can lift up to 100 gallons of water out of the ground and discharge it into the air in one day.
  • Trees first appeared on Earth long before the dinosaurs did - about 400 million years ago.
  • Trees combat the greenhouse effect and slow the effects of global warming. They soak up carbon dioxide and exhale oxygen for us to breath.
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Fave Leaf Color? Vote

  • Green.
  • Orange.
  • Red.
  • Who has a favorite color leaf?

Random In The Forums

blackveilbrides15 posted in Food:
reply 2 minutes
AlphaT posted in Debating:
"unicornsrule626" wrote:most of the ancient peoples projected the world as flat. And they did some amazing things that we can only dream of. Like the pyramids of Giza and Stonehenge  Before addressing this point, I'd like to address the post about Kansas being flat. Land on Earth is not all at the same height. That's why it's not a perfect sphere. Look at a basketball, the height of the ball is equal at any two points. But, with Earth, certain land formations are taller than others. So imagine a basketball, but where certain parts are higher than others. That's why Kansas is flat, and that's why Everest is miles higher than the ground you're standing on.  Now, as far as ancient peoples, they did make the pyramids and Stonehenge. But, that doesn't make them experts in astronomy. The Egyptians believed that the Universe was rectangular, not flat. They also thought that Egypt was at the center of all existence. So, should we believe them?
reply 33 minutes
most of the ancient peoples projected the world as flat. And they did some amazing things that we can only dream of. Like the pyramids of Giza and Stonehenge 
reply about 3 hours
Powerslave posted in Debating:
If you look at Yggdrasil, it shows the world as flat but Midgard is a sphere
reply about 3 hours
jordand08 posted in General:
This thread has been moved. Click here to see the new thread.
reply about 6 hours