Mon Prof Augmenté
Autumn Leaf Colors
Age 10 · Science
In autumn, shorter days make a leaf stop making green chlorophyll. The green fades, yellow and red colors appear, and a corky layer forms where the leaf joins the branch.
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Age 10: open this week
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In the picture
- The green area of the leaf: chlorophyll that is fading
- A yellow patch: color that was hidden by the green
- A red patch: another color that appears as green fades
- The corky layer at the leaf base: the separation point from the twig
Examples
- A maple leaf turning yellow and red on a tree in October.
- A fallen oak leaf with a dry stem end where it pulled away.
Key takeaways
- Shorter days make green chlorophyll fade, revealing yellow and red.
- A corky layer at the stem base helps the leaf separate and fall.
Quiz: Autumn Leaf Colors (Age 10)
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In autumn, what happens to the green chlorophyll in a leaf?
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Why do yellow and red colors show in a leaf in autumn?
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What does the corky layer at the base of the leaf do?
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