Todos disfrutamos de los colores de las hojas en otoño. ¿Te has preguntado alguna vez cómo y por qué las hojas cambian de color en esta estación? ¿De dónde vienen esos colores?
We all enjoy the colors of autumn leaves. Did you ever wonder how and why a fall leaf changes color? Where do the yellows, reds and oranges come from?
Autumn Preparations for Winter
As summer ends and autumn comes, the days get shorter and shorter. This is how the trees “know” to begin getting ready for winter.
During winter, there is not enough light or water for photosynthesis. The trees will rest, and royal review live off the food they stored during the summer. They begin to shut down their food-making factories. The green chlorophyll disappears from the leaves.
As the bright green fades away, we begin to see yellow and orange colors. Small amounts of these colors have been in the leaves all along. We just can’t see them in the summer, because they are covered up by the green chlorophyll.
The bright reds and purples we see in leaves are made mostly in the fall. In some trees, like maples, glucose is trapped in the leaves after photosynthesis stops. Sunlight and the cool nights of autumn cause the leaves turn this glucose into a red color.
The brown color of trees like oaks is made from wastes left in the leaves.
It is the combination of all these things that make the beautiful fall foliage colors we enjoy each year.
So in the end, the answer is related to chemistry, chemistry in the everyday world.
Why Do Leaves Change Colours In The Fall, by SciShow Kids