Why do leaves change color during this time of year?

Answer 1

The leaves don't exactly "change color."
The yellow, red, and brown pigments are there all year long, but are masked by chlorophyll the while the leaves are “alive.” Chlorophyll, made up of tiny green sacks called chloroplasts, is the green photosynthetic chemical most associated with photosynthesis, the process by which plants turn sunlight in to energy.
Starting in spring Chlorophyll is produced, used, and replaced inside the leaf, keeping it lush and green. In the fall, when nights get longer and days get colder, trees start packing up shop for the winter by shutting down chlorophyll production and closing off the leaves from the flow of sap.
Left trapped inside the leaves are other photosynthetic chemicals know as Carotenoids (yellow, orange, and brown) and Anthocyanins (reds, purples, royal blue). Just like with paints, varying how much of what pigment is in each leaf varies what colors will be produced. How much of what pigmented chemical is left behind depends on a whole host of environmental and biological factors including how much sugar is trapped in the leaf, the ph of the sap, temperature, length of days, intensity of sunlight, etc.

Answer 2

Those trees that aren't evergreens go through a renewal phase every year, shed their old leaves, and begin to blossom anew. The cycle is timed with the seasons so that in the winter when there is little sun and much weather, the tree is bare. When the weather gets nice again towards spring, new buds form and the tree gets a whole new set of leaves. These living leaves produce chlorophyll, which is green in color. When the leaves die, they no longer produce this chemical so the leaves will change color from green to the normal change of the seasons making it a beatiful think so see

Answer 3

Those trees that aren't evergreens go through a renewal phase every year, shed their old leaves, and begin to blossom anew. The cycle is timed with the seasons so that in the winter when there is little sun and much weather, the tree is bare. When the weather gets nice again towards spring, new buds form and the tree gets a whole new set of leaves. These living leaves produce chlorophyll, which is green in color. When the leaves die, they no longer produce this chemical so the leaves will change color from green to whatever . . . yellow, red, brown.

Answer 4

The green pigment, chlorophyll, is drawn up into the branches. Some chlorphyll remains and breaks down. The remaining pigments in the leaves now are visible which had been masked by the green during the summer.

Answer 5

throughout the time of iciness, there is not any longer sufficient mild or water for photosynthesis. The trees will relax, and stay off the nutrition they saved throughout the time of the summer time. they start to close down their nutrition-making factories. the eco-friendly chlorophyll disappears from the leaves. because of the fact the vibrant eco-friendly fades away, we start to work out yellow and orange hues. Small quantities of those hues have been in the leaves all alongside. We purely can not see them in the summertime, because of the fact they're lined up via the eco-friendly chlorophyll.

Answer 6

The chlorophyll that makes them green drains away when the leaf dies, leaving behind it's 'real' natural color.

Answer 7

chlorophyll is what makes them green, no chlorophyll, no green