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The green color in grass (green plants in general) is caused by chlorophyll. Chlorophyll is one pigment in plants' leaves that absorbs light (all but the green, obviously, since the green is reflected why it appears green to us). There's also other cellular organs which absorb light, like beta-carotine. All of them have different absorption spectrae, why they reflect different regions of the spectrum of visible light, which is why they might appear orange or yellow to us; those don't absorb orange / yellow frequences.
So when the light changes in the course of the year, the activity of the particles is shifted, chlorophyll is less active than others may be, so the leave appears to be the color of those cells, rather than the color of the chlorophyll which is getting comparatively less.
(sorry if there's grammar faults, I'm not native)
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∙ 15y ago
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What happens to grass in the winter if it is not mowed in the summer?
it gets cold and snowy. then it melts and you mow your lawn.
What kind of grass goes dormant and turns completely brown in the winter?
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What are the disadvantages of carpet grass?
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Live grass is green; dead grass is a yellowish-brown colour.
When do people start to mow their grass?
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Can you plant grass in the winter in Oregon?
no
Your westie has a dry nose?
My Westie's nose gets to be warm and dry when he is tuckered out. His nose is a little drier in the winter, and turns a little brown then.
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COWS eat grass and gets eaten by a human a hamburger
Dog urine brown grass?
Grass turns brown after a dog urines on it because there is acid in its urine. What if they crap?
What are the brown bumps on the California State Flag?
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Are grass frogs green?
Grass frogs are green or light brown.
