WHY DO LEAVES CHANGE COLORS IN THE FALL?

Girls' World - - Quiz -

— Han­nah, 8, NY

Be­lieve it or not, those pretty colors have been in the leaves all along! Dur­ing the sun­nier sea­sons of spring and sum­mer, trees cre­ate their own food us­ing a process called pho­to­syn­the­sis and a green sub­stance named chloro­phyll, which is why leaves ap­pear green in warmer months. How­ever, in the fall and win­ter, trees are un­able to pho­to­syn­the­size be­cause of a lack of sun­light, so they stop mak­ing chloro­phyll. As the last of the chloro­phyll gets used up, the green color dis­ap­pears from the leaves and the vi­brant red, or­ange and yel­low colors start to ap­pear.

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