Why Leaves Change Color: The Science of Fall

Why Leaves Change Color: The Science of Fall

Update: 2025-11-03
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Fall is the season when leaves turn bright shades of red, orange, and yellow before they drop to the ground. But why does this happen? During spring and summer, leaves are full of chlorophyll, the chemical that makes them green and helps trees make food from sunlight. When fall arrives and the weather gets cooler, trees slow down food-making, and the green color fades away. That’s when the other colors—reds, yellows, and oranges—appear! This video explores how weather, daylight, and leaf chemistry all work together to create the beautiful colors of fall.


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Why Leaves Change Color: The Science of Fall

Why Leaves Change Color: The Science of Fall

Bedtime History