Plant experiment?

Question

if you take 2 similer plants that are about the same size and same in evreything then you take them to the middle of the desert and water them with one cup of water (both of them)

then you cover ONE of them with SUN CREAM (the one you put so your skin wont burnd from the sun)

well wich one of them will dry first the creamd one or the normal non changed one?

Answer 1

Well, you certainly will get better experimental results by experimenting rather than asking folks what they think the experiment would yield...

But don't you think that sunscreen might kill the plant?  Forget about the desert, plants don't like to have greasy stuff rubbed on them.  It plugs up their stomata, for one thing, so it might reduce the plant's transpiration, but then it might kill the cells, causing them to break and leak, so its hard to say which one would dry up first, but I'd bet that the sunscreen plant would die first, but it might end up a greasy wilted mess, whereas the other plant would die of dehydration.  

Are you trying to get at the effects of UV light on plants?  Maybe you should consider some sort of UV-proof window or something.  But UV has little to do with "drying up", just as a sunburn is not getting too hot, but rather chemical breakdown from high-energy light rays.  Some plants can get sunburned as well--mostly certain shade or houseplants.  You need an experiment that differentiates the effects of heat and the effects of UV light.