how i do a experiment of 8th grade?
817752
Try these sites,\nhttp://school.discovery.com/sciencefaircentral/\nhttp://www.scifair.org/\nhttp://www.usc.edu/CSSF/\nhttp://www.energyquest.ca.gov/projects/\nhttp://www.libraryspot.com/features/scienceprojects.htm\nhttp://scienceclub.org//kidproj1.html
1140853
One of the best current techniques is called Design of Experiments (DOE).  There are numerous software packages to assist in proper design and give you the results.  The design consists of determining the number of variables and the levels of each variable you want to test.  You must also decide how many samples of each variable set you want to check.  For the first experiment keep the number of variables and the number of levels of each variable to a minimum.\n\nFor example:  If you want to determine the best way bake a pizza,  you may select oven temperature, bake time, and position in the oven.  If you decided to test two levels of each of these variables ( 400 & 450 degrees, 12 & 15 minutes, lower and upper rack position). For a full experiment, you would have to bake 8 pizzas.  If you wanted to bake 2 of each combination, to gain confidence in the results, you would have to bake 16 pizzas.\n\nIf you wanted to test three levels of each variable, the number would jump to 27 pizzas and 54 pizzas, which would be vey costly.  Keep the experiment simple and use the same brand/type pizza for each combination.\n\nYou may get great results with more than one combination, that's good.  If you get the same results with many combinations, you will have to redesign your experiment to widen the levels or pick a different variable to test.\n\nHope this helps.
564731
You can do your own? Thats pretty cool. I always liked the bubble gum mass lab. Take like two whole packages of bubbleyum and record its mass unwrapped (not the weight, your teacher should have a mass scale). Then chew all of it for about forty minutes. Don't swallow. Record the mass of the chewed blob. It'll be less even though its still the same gum. The chewing excretes certain substances out of it (some research required there). This'll actually work for a physical science or a chemistry lab. And while your classmates are working hard on their labs you'll be blowing bubbles the whole time. Hope that helps.
956408
First we have to set up the experiment\n1. Get several pieces of bread 6 or 8 or 12 ?...make them the same size\n2. using an eye dropper put the same amount of milk on them to start the mold (or are you going to let them mold on their own??)\n--make sure they are in an enclosed area that bugs and animals can't get to\n3. once mold is started - put down how many drops of bleach you put on each one\n..for example - \nA. piece - one drop - \nB. piece - two drops\nC. piece - three drops\nof course, if C piece accidentalyy gets 4 drops - swap it for D piece and make D- then C - and put three on the new C (hehehehe)\n4. Now closely watch and monitor your bread\n5. Note which mold was killed - and then you know how much bleach was needed\n...all mold on pieces D E F G H were killed - showing that 4 drops of bleach killed the mold
1007912
We did a similar lab in my math class. It will be about half whenever you flip 100 pennies, then half again, ect... This is roughly the same thing as the radioactive element ("half-life").\n\nNow, make sure you do the work so you will know the material, and explain the relationship in words your teacher would like to see.\n\nGood luck.
562654
Okay, I'll try this one -\n\nRun this experiment twice (or more times), each time with a piece of metal having different density.  The metal piece should be of adequate size (a sewing needle isn't going to do it), it needs to be big enough to significantly affect the temperature of the water.  You will need to know the mass of the metal (i.e., weigh it) and have a thermometer capable of reading from room temperature up through boiling or so.  Please note this is not going to give you a highly accurate answer, but can give you a ballpark idea (I'm guessing you're probably not doing this in a 500 million dollar lab).\n\nThe procedure:\n\n1)  Measure and record room temperature as T1.\n\n2)  Weigh the metal, call it M1.\n\n3)  Bring a known quantity of water (weigh it, or measure it and convert to weight, call it M2) to a temperature just short of boiling (say 180F to 200F, use the same temperature for each run of this experiment).  Record the temperature as T2, and remove the heat source (take it off the burner, etc.).\n\n4)  Drop in a metal piece at room temperature.  Allow a couple of minutes for heat to exchange.  Make sure you use \nthe same amount of time for each run of this experiment.\n\n5)  Measure and record the new temperature of the water as T3.\n\n6)  Repeat with your other metal samples.\n\nYou can now estimate the specific heat capacity for each metal.  It will not be super-accurate (heat escapes your system, and temperatures won't have completely equalized), but should give you some idea.  Just assume all temperatures did equalize and that no heat escaped for calculational purposes.\n\nSince (you are assuming) the heat which left the water went into the metal, then the product of mass, specific heat capacity, and temperature change should be the same for both the metal and the water (but in opposite directions).\n\nThis means that:\n\n(M1)(c1)(T3-T1) = (M2)(cw)(T2-T3)\n\nwhere c1 is the specific heat capacity of the metal, and cw is the specific heat capacity of water (look it up on Google to get the units you need).\n\nSolving this, you get:\n\n......(M2)(cw)(T2-T3)\nc1 = -----------------\n........(M1)(T3-T1)\n\n(sorry about the dots, I'm trying to keep everything aligned)\n\nRepeat the calculations for each of the metals.\n\nYou will need to calculate (or look up) the densities of each of the metals.  Then, graph density vs. the specific heat capacities you calculated, and see if your hypothesis is true.\n\nHave fun!
350704
air resistance.\n\n Do the experiment yourself- if at school- get a teacher to make up a sealed tube, suck out the air (less difficult than it sounds- i remember doing something like this) and then invert it. its very strange.
182140
i'M IN SIXTH GRADE, AND A GOOD SCIENCE FAIR TOPIC WOULD BE "WHICH SUBSTANCE CONDUCTS ELECTRICITY BEST". iT IS REALLY EASY TO DO AND YOU CAN HAVE LOTS OF GRAPHS. FOR EXAMPLE I HAVE 21 GRAPHS. AND MY WHOLE ENTIRE BOOK IS 93 PAGES LONG. \n\nHOPE i HELP YA!!
207210
go here: http://school.discovery.com/sciencefaircentral/
963231
http://www.perfect-science-fair-projects.com/9th-grade-science-fair-projects.html\nthere's some ideas. good luck.
620413
Do the experiment.  You might learn something.
873828
Here is a site that has alot of science experiments that work well with the elementary age group.\n\nhttp://pbskids.org/zoom/activities/sci/
865828
The following link has some good ideas for different projects. \nhttp://www.all-science-fair-projects.com/category0.html\n\nAlso, the following link might help you set up a science fair display board if you have to have one.\nhttp://www.sciencebuddies.org/mentoring/...\n\nA good elementary science fair project is testing the density of various liquids.  All you need is a tall clear glass or vase and various liquids such as... dishwashing detergent, mineral oil, corn syrup, olive oil, water (dyed blue), molasses, or corn oil.  Use at least five different liquids (of different colors... makes the project more attractive) and slowly pour them into the container.  Also, perform the experiment more than once adding the liquids in different orders and note your results.  This project is easy, but it is also very educational and helps to teach the basic concept of density.
161747
Third grade kids love exploring and finding out about the world.  If you have access to pond water for example,  collect some and have them examine drops of the water under a microscope and then draw what they see.  Have them do it as a real "lab" experiment so that they also write about their observations, label their drawings, etc.  Do a class write up of their observations with each child contributing something to the class write up.  You could continue with a discussion of why we don't drink pond water, etc.  I have used this lesson very successfully with kids from about second grade to eighth grade.  It is one of the most awesome lessons I have used, and with some classes we have carried on activities related to it for days.\n\nTo sdd to what I wrote previously, her eis an answer I wrote for someone who asked for some suggestions on presenting ... some of htis might be basic for you, but some might help ...\n\nMake sure you project your voice, and make your voice interesting and expressive. Speak clearly, and slower than you would if you were just chatting with friends. Don't move around while speaking - try to stand in one spot, which makes it easier for those listening. Don't fidget. Try to use some humor. Use an ice breaker for the beginning of your presentation. One good one is to get everyone to tell something they have done that they think no one else in the room has done. You find out lots of interesting stuff about the group. Start on time and finish on time. Get their attention - don't try to talk over a lot of noise. Find ways to involve them - try to plan some activity that will teach them something and that will fit well in your time frame. Dress in a manner that suits your topic. \n\nGood luck!
927947
build a big arc out of paper mache.\ngive the lengths of straight lines to the end of the arc. \n\nhave students gague the length by "eyeballing it"\n\nthen use a piece of rope to demonstrate the actual length..\n\n.
73023
A classic, but great visual experiment is sucking a hard boiled egg into an erlenmyer flask.  It is done by using the principles of the kinetic theory of matter.  \nAnother cool project might be doing something with dry ice.  Find a place that you can get dry ice and do fun stuff with it, like create smoke, put bubble solution in water and then drop in dry ice to make bubbles that, when you pop, let out white smoke.\n\nAnother idea might be to do some cool colorful reactions.  Make some dye molecules or something.\n\nHope one of these ideas works for you.
946575
How about visiting this site:\n\nhttp://www.all-science-fair-projects.com/category0.html