A leaf changes color because it gets colder, and the green stuff starts to go away. When summer ends, the days get shorter, and the tree thinks it's time to rest. The green part of the leaf, called chlorophyll, disappears, and other colors like yellow and red come out. That’s why leaves look pretty in the fall.
Examples
- A tree in the forest notices days are getting shorter and sends a message to its leaves: ‘It’s time to change color.’
- Like when you stop eating your favorite candy, your stomach feels empty, the leaf stops using chlorophyll and other colors show up.
- When a tree gets cold, it tells its leaves to say goodbye by turning them orange or red.
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See also
- What Causes the ‘Color’ of a Leaf in Autumn?
- How Do Plants Know When to Bloom in the Spring?
- How Do Plants Know When to Bloom?
- How Do ‘Plants’ Grow in the Dark and What Happens if They Don’t Get Light?
- How Does a Plant Know When to Flower?
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