How many house plants are needed to improve oxygen levels, in order to see results?
146756
I think when plant absorb water, or H2O, they use the H, or the hydrogen, and aspirate (or "exhale" in animal terms) the oxygen they take in as a liquid as a gas. The aspiration I believe is very slow and could take 100 plants 100 years, longer than the average lifespan of a human being, to see significant increases in oxygen levels.
190061
Trees are a major contribution to the oxygen we breathe. There are many plants used in the production of the medicines that cure our ills and keep us alive.
801568
I did an experiment with this in graduate school.  When a plant has limited to no light, it invests all of its energy and growth into finding a light source.  In my experiment, the plant grew very tall and had very few leaves (since it could not go through photosynthesis anyway, why bother).  It was a very interested experiment and proved that even plant have priorities.
1038791
I found an answer here:\nhttp://www.auburn.edu/communications_marketing/askaubie/101205.html\n\nOne estimate indicates that a large tree whose trunk is 39 inches in diameter at breast height releases 0.67 pounds (0.31 kilograms) of oxygen per day.  For comparison, according to NASA, a typical adult would use 1.85 lbs (0.84 kg) of oxygen gas per day in the process of respiration. \n\nSo you would need 3 trees for one person. And double that if you take into account that the tree only produces oxygen during the day.
1084762
Are you talking about plants?
111339
I would probably do it by making a chart.\n\nYou should have atleast two plants (one control and one that was watered with vinegar), or for a good experiment, you should have more than two plants, one control and several other plants watered with differnt concentrations of vinegar.\nI would make a chart [and/or graph] of the growth progress of each of the plants by day/week/... based on what concentration of vinegar each was watered with.
332041
Nitrogen is important to plant growth.
876879
Plants do not take in Oxygen. They take in Carbon Dioxide (the main gas we exhale) and produce Oxygen.
648771
ro plants and spares ????? can u pls be spcific?
329671
Hmm, you are in luck.  I am a biologist/chemist with a little ecology and botany knowledge and I might be able to help you out here.  But in the future, procrastination is not the answer.  Trust me, I know.\n\nAnywho, on with your project.  And, kudos to your teach.  He is getting you ready for college.  Lets see, you are wanting to germinate seeds.  It would be feasable to choose seeds with very quick germination times as probably you don't have a very long time to perform this experiment.  Some grasses will germinate in as little as 7 days.  With a little research, you can find your own seeds to use.  Next, you are going to have to decide what treatments you want to apply to each group.  And by each group, you need to have more than one "cup" of seeds, more like 4 or 5.  That is for replication.  By treatments, you could use things like adding different types of fertalizer in each group.  Use fertalizers that differ in the amount of phosphourus, nitrogen, and potassium (3 primary nutrients required by plants.)  Then, with multiple groups recieving the same kinds of fertalizer, vary the amount of sunlight (preferably artificial, like an incandesant lamp) and amount of water given.  What you will end up with is something like this:\n\nfertalizer A - 15 cups; each cup gets 1 tb of fertalizer\n      Cups 1-5 get 10mL of water and 12 hrs of "sunlight" daily\n      Cups 6-10 get 10mL of water and no "sunlight" daily\n      Cups 11-15 get no water and 12 hrs of "sunlight" daily\nRepeat this for say, 3 or 4 different types of fertalizer over a 10 to 15 day period.  Also, have 15 cups that follow the above procedure but get NO fertalizer.  After the 10 to 15 days, compare growth of the plants by measuring (probably in mm) the amount of growth produced.  \n\nBy performing a little research of your own and whatever plant seed you decide to use, you can base your hypothesis on how each fertalizer "should" affect your seeds and how much they "should" grow.\n\nFor example, lets say nitrogen is the main nutrient needed by grass.  Any of the fertalizers used that are low in nitrogen would not grow as much as the ones that get the nitrogen.  And those that do get the nitrogen, the ones that get water and sun will grow more than the others that get only sun or only water.  So, your hypothesis would be something like this:  The seeds that recieve adequate amounts of light, water, and nitrogen will have more growth after x amount of days than the other plants.  Then, you perform the experiment and see what you get.  \n\nGood luck on your experiment and if you remember, let me know what your teach thinks and what grade you get!
791993
well theres alot of material i can provide you with but i dont know what particular experiment you are designing as there are always different experiments within an experiment.\nanyhow, i think this is an example of an experiment for photosynthesis and respiration and their pH levels.\n\nhttp://www.science.siu.edu/plant-biology/plb337/old_st_papers/emmert.pdf \n\n\nif you are doing the same experiment, i guess you will find this one really helpful.\n\n.. Good Luck
307035
Using elodea (pond plant) in water (gives the elodea the water it needs for photosynthesis) with a small amount of sodium hydrogen carbonate added (gives the elodea the carbon dioxide it needs for photosynthesis) in a test tube, put it at different distances from a source of light. Then for a minute at each distance, count the amount of bubbles of oxygen being produced by the elodea in the test tube. This shows how the rate of photosynthesis is affected by the light intensity. Remember to use a perspex screen between the light source and test tube so that no warmth is passed from the light source to the elodea, affecting the results.\nI hope this makes some sense!!!\nBest wishes.
7747
many plants tend to be healtheir and grow faster and produce more using hydroponic means.\n\nHowever not all plants can be adapted to such means.\n\nSee the sources below for more information.
959615
i would set up the project to include 3 different types of plants, and 5 different levels of fertilizers.  pick 3 very different types of plants that grow in different climates or conditions.  for the amounts of fertilizers, for each of the threet types of plants, put no fertilizer, this will be the control.  then put 3 varying amounts of ferilizers on the 3 of each type of plant.  i recommend 1%, 5%, and 10% (but it depends of the type and concentration of the fertilizer) of the soil quantity be replaces with fertilizer.  for the 5th of each of the three types of plants, put in 50% fertilizer, this will be your sample that shows what happens when fertilizer is totally overloaded.  i can give you a lot more ideas if you want to go in depth.  otherwise, this should give you a good start.
605258
Recycling. Electrolyse of water. Plants give O2.\nCompressed and deep cooled liquid O2.
24977
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
168025
>>>>I know iron is needed to produce chlorophyll. \n\n\nNo, you don't. Really.