1) Why some leaves are yellow but others are green?
Ans: Some tress never turn yellow even in winter, and even if they do, it's not to say 1,2,3 all the leaves will turn yellow at the same time!
2) Why are there green trees when it is in winter?
Ans: See above answer. And sometimes, snowing is not a definite indicator of winter. Occasionally, it also snow in late autumn or early spring, like Oct or April.
3) Why in winter there are roses?
Ans: See above answer.
4) Why are the fallen leaves ON the snow layer instead of below 'em?
Ans: sometimes, leaves fall after snowing.
5) Why are the leaves not rotten when the snow melts?
Ans: the rotten process is not shown in the pictures.
6) Why are the leaves not drooping when there are snow on 'em?
Ans: "Drooping"? or do you mean dropping? Refer to above answers. And some trees do have higher tolerance level to the coldness of winter.
7) Why are there snow on the car and buses when there is no parking slot nearby?
Ans: Not all cars or buses are parked on parking slots. Yes, i know you might going to say "see the ugly Chinese!", but hey, the lack of parking slot might be due to fast growing economy. Moreover, despite of such fact, we still enjoy the beautiful snow scenes.
8) Assume wind comes from the north, and snow fall on the north side of the trees, why does the sun shine from north also? ;)
Ans: What has the direction of sunshine to do with the direction of the wind? You think there are only wind breeze from the north in winter?
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