I am doing a science project and I am curious if the type of water used affects the growth rate of plants.
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if you experiment with potted plants, it is likely, that far more nutrient is in the soil, so you will observe nothing. (only some plants do not tolerate too much watering, too cold water, chlorinated water - fresh from tap, ) I suggest you go for hydroponia (plant in water and nothing else) so that you can get somewhere. I also suggest you use seeds so that you have larger number of identical material - lets say each experimental variant will look like three-five  dishes with 50 cress/mustard seeds each.  (TO RULE OUT CHANCE!!! ) you can try different waters and your experiment will still take up the space on one window sill or small desk. You will observe different coloration, growth rate, as the plants will experience lack of nutrients (you can also try different fertilizers, different ammount of it, do chemical tests with your waters). I dont recomment larger seeds than that, because then you will have much nutrients in the seeds themselves.\ngood luck
205508
Depends on how good the stuff you grow is. Hydroponics, in itself, does not guarantee quality but will give a better growth rate.
367603
Depends on the plant. Some plants grow faster than others.
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just measure how much water they lose to the atmosophere some how and keep track of the amount of water you have added over a period of time. \nThis should be an interseting experiment.
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Transpiration and concentration gradients
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the U.S. Department of Agriculture or an extension service should have a site than can help you. Also try the U.S. Geological Survey. Different species of plants require specific soil types, nutrients and soil ph for proper growth.
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Yeah, that's good.  You could grow some type of plant in each and compare the results.  Some advice - you might want to specify your experiment a bit.  For example, a similar idea is to see whether potatoes grow without soil.  See the third site below.\n\nCheck out these sites.\n\nScience fair projects involving photosynthesis\nhttp://photoscience.la.asu.edu/photosyn/education/sciencefair.html\n\nAgricultural ideas for science fair projects\nhttp://www.ars.usda.gov/is/kids/fair/ideas.htm\n\nScience Fair Central\nhttp://school.discovery.com/sciencefaircentral/scifairstudio/ideas.html
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It depends on which method you are talking about and the end use of the water.  For drinking water they are strictly monitored.  For industrial reuse, you try to balance cost and quality so you can have problems.
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When I was in 9th grade we did a plant project. I bought two small plants that were the same. One of the plants I left it in the sun watered it everyday and took good care of it. The other we put it in a dark place and also watered it everyday and also took good care of it. I did it for two weeks. Everyday I would make an observation of the lenght of the plant and the leaves it dropped and wrote it down. Then on a posterboard I did 4 large graphs. Two of the graphs were the length it grew each day for each plant. And the other two I graphed how many leaves would fall out of each plant. And when I presented it in front of the class I brought both plants and my conclusion of the project was the affect the sunlight has on a plant. It really hopes that works. By the way I got an A+ on it.
17249
if you gabve very cold water to a plant it might not be able to metabolise it properly
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Well, i don't know for sure either,\n\nbut i've been reading in some books that telling about an experiment by turning a Classical music and a Heavy Metal music beside a plant (the same species of plants with the same caring), it turns out that the plant with classical music was grow healthy and gave a good fruit, while the Rock plant kind of skinny and don't even gave any fruit, and die slowly.\n\nI never seen it by myself, but i think it's logical that the sound wave (wich is energy) somehow bringing some kind of information (or effecting by force) to the plant (life being) and effecting the life of the cell...\n\nI haven't really make a research on this anyway, i have another project right now...\n\nHope this help\nBless You
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Okay, the difference between water and soda is the addition of sugar and CO2. Some plants can actually metabolize sugar, and they all breathe in CO2, which sounds good. But, the CO2 is under pressure, or it wouldn't stay in solution, so it will probably increase the pressure inside the plant's cells. Which, depending on the plant, may rip it apart. Or not. Hope that helps.
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if a plant is in a windy area, evaporation happens faster. Or in not too bright of sun, photosynthesis happens faster.  Also, if it's well watered, the roots suck more in and push it through the plant.  \n\nThis probably won't help at all, since I have no idea of what you're really talking about, but someone once told me that they liked nothing more than attempted BS.
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The reaction to music is an odd one. The "Mythbusters" did a segment on it once. It seemed that the more SOUND a plant recieved usually resulted in more growth. Therefore, yes music does affect plants.
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Water is not a good conductor of electric current it conducts electric current because of the impurities present in it.\n\nWhy?\n\nWith this simple experiment you can verify that the distilled water presents a very low conductivity because the potential of the first circuit is much less than the developed by the battery. The small potential of this circuit is due to the presence of the H+ and OH- ions produced when some molecules of water are dissociated. However, the number of molecules of water that are dissociated is practically negligible, making the distilled water a weak electrons conductor. It is worth noting, that as the distance among electrodes increases, the resistance to the electrons transfer in the distilled water increases considerably. This fact evidences even more the low conductivity of the distilled water.\n\nWhen salt is added (NaCl) to the system, the conductivity of the system increases considerably. The water not only dissolves the salt, as well as it dissociates the salt molecule. The elementary sodium (Na) presents an excess electron and the chloride (Cl) has a strong affinity for electrons. Consequently, after dissociation, the sodium loses an electron to the chloride, forming Cl- and Na+ ions. The presence of these ions increases the conductivity of the water considerably. The positive ions (Na+) migrate to the negative electrode (linked to the pole - of the battery) and the negatives (Cl-) migrate to the positive electrodes (linked to the pole + of the pile). The conductivity of the aqueous solution water/salt is proportional to the ions concentration in the solution.\nWhen you try to measure the conductivity of tap water you can verify that it has higher conductivity in comparison with distilled water because this contains ions (less pure). The tap water has higher conductivity due to the presence of the ions: Ca2+ and Mg2+. And don´t forget, try the science at home!
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Depends on the plant.  Some plants, like kelp or Utricularia thrive when totally immersed.  Others cannot transpire properly unless their leaves are exposed to air, and will 'drown' in water.
8380
There's a formula in this article:\nhttp://www.naturodoc.com/library/nutrition/water.htm