How to set up an experiment involving a large jar of water and a cigarette.?
459257
Same principle as a hookah.  Stick the cigarette in one end of a long tube that passes through the cork and down into the water.  A short tube passes through the cork but doesn't reach the water.  Suck on the short tube (or in some other manner reduce the air pressure in the bottle), and air pressure will pull air/smoke through the cigarette and long tube and you'll get smoke filled bubbles in the water.  If you put in a screen of some kind that breaks the bubbles up into many small ones, more of the smoke will dissolve in the water.  A water pipe does this to cool the smoke.\n\nYou too young to have seen Alice's caterpillar smoking his hookah?
180865
Try a teaspoon of vinegar
1154311
mix sugar and potassium permanganate and ignite and it will produce a large amount of smoke,
254310
Fill the tin with a small amount of water (approx 1 cup)\nHeat over a bunsen burner until water is boiling well.\nuse two fingers (inside a GLOVE) to screw the lid on the tin.\n\nPlace the tin in cold water, picking it up with 2 fingers..\nThe Steam from the water boiling displaces the air inside the tin, when you cap the tin and place it in cool water, the steam condenses back to water, a reduction in volume of 1725 times. This creates a vacuum inside the tin, and air pressure, 14.7 pounds per square inch, CRUSHES the tin
510537
That won't work, they'll know its been refrigerated. You'll have to drink your friends urine right before the test so that    the clean pee comes out of your body. Get all high and think about it, it will make sense then. Smoke a phat J and then guzzle some piss, works like a charm.
731168
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.
687051
That could be determined by calculation based on the chemistry of the dissolve CO2, but that would become quite involved.  \n\nAnother way would be to measure the volume of CO2 given off by a known volume of Cola, and then factoring it up to he 2 L.  This could be done by collecting it into ann inverted test tube filled with water.  The CO2 would fill the tube and displace the water.\n\nOr else, guzzle a 2 L bottle, and measure the volume of the burp.
47409
You could experiment with various mixtures, solutions, and compounds around the house, like saltwater, cleaning solutions, cooking ingredients, clean water, beverages, or stuff like that.  Find an electrolyte tester, or you can make one yourself by connecting a battery and a lightbulb to two independent probes (alligator clips work really well for this), then dip the probes into the liquids to see if there are enough electrolytes in the solution to sustain an electric current by recording whether or not the light bulb lights up.
1026894
try a gravity bong....keep on smoking...you are keeping me in business as a respiratory therapist!! See you soon with a big tube down your throat....fool
61086
I used to judge high school level science projects, so here is what I would like to see:\n1. Make an observation about something that you want to try to explain or figure out. Why does this happen? That is the basic question you are going to answer. It doesn't have to be earth-shattering, but it helps if the answer is not already known to everyone. Floating Diet Coke and Coke cans to see which is denser is perhaps an interesting experiment, but hardly difficult to predict. Using coffee filters to do paper chromatography to separate compounds can be ingenious and dramatic, especially if you find something to test that is a real problem like detecting some sort of carcinogen in food. \n \n2. Research the project. Check in the library and on the internet for possible research that has been done similarly to your problem. Even if it has been done, you might want to retest the answer that other researchers got. Make a list of your research results as your references. Your ideas might change in this stage.\n\n3. Form a hypothesis about what you think will happen. You can have more than one. Your project should be able to be tested by an experiment. \n \n4. Design your experimental procedure. Write it out. Figure out what the variables are in your experiment and try to test only one of them at a time. Keep all the other variables constant. You can change the other variables to see the change in the effect of one variable on another variable. \n\n5. Record your data as you do the experiment. Keep lots of notes so that someone who wants to see your records can see what you have done. \n\n6. Do some calculations with your results. Make a graph, tables, and draw conclusions. \n\n7. Summarize it and state how it could be done differently or better. Here you can speculate about what sort of things might be meant by your results. \n\nIf you do all this stuff, even if your experiment is not dramatic, you are likely to impress the judges with your understanding of the scientific method. Of course, having an exciting and imaginative project is also going to be needed to get first place. \n\nAs for the content, there is so much to choose from it is hard to guide you. If you are interested in biology, you can grow some fast growing plants under different conditions and see what happens. If you like earth sciences you could do a test on greenhouse gases, using a CO2 cartridge to fill a container, plain air in another, and perhaps one with high water vapor content and see which one absorbs the most heat from sunlight. It always helps to find something you are curious about or that concerns you. Rather than listing lots of ideas I would recommend you go to this website and get some ideas, and then discuss it with your teacher:\n\nhttp://sciencebuddies.com/
1023923
When I was in Explorers, some Boy Scouts used a short section of heavy-walled pipe and an ignition source (like a piezo-electric lighter for a gas grille).\n\nThey welded the pipe to a flat plate on one end and left the other end open, but you could drive the pipe into the soil if you don't have access to a welder.\n\nWhichever way you go, install and test the ignition source before adding fuel.  You should hear a clicking sound, and you should be able either to see the spark or tell that there is a spark being made.\n\nGasoline can be introduced either as a mist or as a liquid (don't let it wet the igniter).  Even in warm weather, if it goes in as a liquid, you'll have to wait a few seconds for it to vaporize (make enough fumes) sufficiently.\n\nThe really neat thing about this experiment is that it lets you demonstrate the difference between "(combustion/ combustability/ flammability) limits in air" and "(explosive/ explosion) limits in air" -- the latter being a comparatively narrow band of concentrations usually between the maximum and minimum concentrations required for combustion (fire).\n\nThe experiment can be simply modified to use an ignited candle as the ignition source, and dust as the fuel.\n\nTHIS EXPERIMENT IS OBSCENELY LOUD!\n\nBE CAREFUL AND WEAR DEVICES TO PROTECT YOUR EARS AND YOUR EYES.  DO NOT ALLOW FOREIGN MATERIALS INTO THE COMBUSTION ENVIRONMENT.\n\nDO NOT PLACE THE EXPERIMENT UNDER ANYTHING THAT MIGHT CATCH ON FIRE OR BE DAMAGED BY AN EXPLOSIVE BLAST.  DO NOT PLACE ANYTHING OVER THE TOP OF THE PIPE (COMBUSTION CHAMBER).  DETONATE REMOTELY.\n\nWith adequate precautions taken, this experiment should be plenty safe for children ages 4-7.  Do not reduce attention to safety for older children: the "7" simply indicates older children are going to want a lot more "effect" and should be competent to handle more more powerful experiments.
217873
Measure concentration. Use a dummy (with water only) measuring that with a LabPro probe. Then compare that to a certain volume of a variable soft drink. I did this in high school, hope it works!
471742
Ummm...You will have to figure out which is faster... but I can give an idea as to proceedure...First, try to answer this question: What are all the colored species in grape juice? You need to know that first. Hopefully there is only one. That would simplfy things. Then you need an extinction coefficient for that compound, if you can find one. Using that, you can take several absorbance measures and use Beer's law to establish the concentration of that species in your stock solution. Beer's law states that Absorbance = extinction coefficient x concentration x path length. Your path length is the width of your cuvette, which is usually 1 cm. Beer's Law will not be valid if you use a solution that is so concentrated that it gives you an absorbance value greater than 2. At Absorbance = 2, well over 99% of light is being absorbed. A reading over 2 is thus considered analytically unusable. Your juice can be diluted, if necessary, with DEIONIZED (aka distilled) water. Once you do that, I would roughly time each reaction by just looking at it with my eye, adding just a drop or so of bleach/peroxide initially, and increasing the amount only if necessary. Make sure to add exactly the same amount of bleach/peroxide to exactly the same volume of grape juice. Once you have the reaction basically set up to your satisfaction, then place your juice sample in the colorimeter and get ready to add your reagent. Remember to take a measurement before you add any bleach/peroxide for EACH of the two tests. And take your measurements on the same time frame (ex: every 30 sec.)Good Luck!!! :-)
158796
I assume you know what osmosis is.\nIt would be nice to end up with enough results to plot a graph (LINE graph) so you will need at least four (more is better) solutions of different concentrations. Sucrose solution is usually used.\nUse a BIG potato so that all your samples are as similar as possible.\nThe easiest way to get uniform samples is to cut cylinders with a cork borer, then cut into 5mm disks.\nPut 10 discs into each solution.\nWeigh 10 discs before they are put in, then CAREFULLY blot them dry and reweigh them next day.\nCalculate the change in mass per gram of potato (you could expect some to gain, some to stay the same and some to lose so you will get some negative values).\nPlot a line graph of 'change in mass per gram of potato' AGAINST 'concentration of solution'.\nNow you must consider what the graph show you.
575510
I found a web site with a lab on how to figure out releative density of a given liquid hope it helps.  It has all the instructions and materials needed listed on the site
177885
Take various juices and put food coloring in them. Have some students taste the juices and see if they are fooled. Copy that down and make a chart for every juice and how many were fooled and not. It should be interesting. (I suggest water into purple to look like grape juice...and so on for others)
343519
Here's a way to turn a common household chemical reaction into some fun.\n\nhttp://www.torgo.org/bpsubs/