If the plants break down the chlorophyll and move it out of their leaves before the leaves fall, plants save energy. The plants can reabsorb the molecules that make up chlorophyll. Then, when it's warm and sunny enough to grow again, the plants can use those molecules to remake the chlorophyll. That way the plants don't have to make chlorophyll from scratch.
There are other pigments in leaves called carotenoids. Carotenoids are yellow and orange. Anthocyanins are other plant pigments that are only made in the fall. These pigments cause red, pink, or purple colors. Anthocyanins also protect leaves from being eaten or getting sun burned.
So the different colors in leaves are caused by changes in the pigments. When the weather changes, some plants break down all the green pigment. This lets beautiful yellows, oranges, and reds come through in the fall. Have a different answer or more to add to this one?
Every autumn we revel in the beauty of the fall colors. The mixture of red, purple, orange and yellow is the result of chemical processes that take place in the tree as the seasons change from summer to winter. During the spring and summer the leaves have served as factories where most of the foods necessary for the tree's growth are manufactured. This food-making process takes place in the leaf in numerous cells containing chlorophyll, which gives the leaf its green color. This extraordinary chemical absorbs from sunlight the energy that is used in transforming carbon dioxide and water to carbohydrates, such as sugars and starch.
Along with the green pigment are yellow to orange pigments, carotenes and xanthophyll pigments which, for example, give the orange color to a carrot. Most of the year these colors are masked by great amounts of green coloring. But in the fall, because of changes in the length of daylight and changes in temperature, the leaves stop their food-making process. The chlorophyll breaks down, the green color disappears, and the yellow to orange colors become visible and give the leaves part of their fall splendor.
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Join the Discussion. Bryan Nov 20, Love it, it really was hard to read though because of the high lightning but it was realy good except for that. Nov 23, Hi Bryan! Cool passage, we are using it in science class, and it is really helping us get the correct answers! Deborah Oct 30, Where can I find info on previous fall foliage dates in the Northeast?
Nov 5, What is your favorite part of summer, ? Jeff Nov 2, Robloxmaster Oct 22, Nov 12, We're glad you liked this Wonder, Jeff!! I like fall and like the leaves color but I like summer better. Jace Nov 2, Thank You! We're so glad that you're our Wonder Friend!! Oct 23, We're glad you liked this Wonder, kaden! Danny Oct 11, Oct 16, Sep 27, We're glad you liked this Wonder, lacey!! Aug 12, Paige Jul 31, I really enjoyed reading about the leaves in autumn!
I learned some interesting new words from this like 'chlorophyll' and 'photosynthesis! Aug 1, Purvisha Jul 30, Hi I never knew that each lea is a solar panel. I wonder why leafs fall of in Autumn Thanks. Jul 31, Jessica Jul 25, Hi I have learnt that each leaf is like a little solar panel. I wonder what pink leaves come from. Jul 27, Stephen Dec 8, Dec 9, Hi, Stephen! The xx "intro" is featured in this video.
Nov 9, This reading is just wonderful thx Wonderopolis xx!!!! Wow, thanks for commenting, Bleach!!!!!!!!!!!!! We're glad you could learn with us! Stephen Oct 29, Oct 31, Grace Oct 26, Carolina Oct 26, Oct 27, Hello there, grace and Carolina! Oct 5, Aug 29, We're glad this Wonder jogged your memory, nora!
Talk to you again soon! Andrea Sep 28, I was wondering - what grade level or lexile is this article? These are the trees that, in general, also shed their leaves every year at the end of their growing season. Just like we focus on environmental cues to usher in fall and pumpkin spice season, so do trees. Anything that clues you into knowing that sweater weather is coming; things like the days getting shorter and the temperature getting colder.
We pick up on seasonal changes and so do trees. This magic revolves around photosynthesis, which is the process of how plants harness energy from sunlight and water and carbon dioxide to make food for themselves.
To make a long story short, in order for photosynthesis to even happen in the first place, trees need a way to capture sunlight, which they do through pigments in their leaves.
There are a handful of different pigments in each leaf, and each of these pigments absorbs some light and reflects the rest of it.
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