7th grade science fair scheme ideas are likely more complex than the projects you've done in old years. The science fair at your school is likely more contentious for your age group and there's a good occasion your peers will be putting a lot more time and attempt into their projects than they have in old years, so you'll want to do the same for your 7th grade science projects.
One sharp idea might be to see which type of cheese mold will grow on the fastest. This is a great scheme because it's interesting, but still fairly simple. Someone else idea for a scheme might be to see if you can grow a plant without soil. You can try placing seeds in discrete things such as a wet paper towel, grass clippings, coffee grounds, etc to see if they will grow. Be creative!
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You could find out whether the nearnessy of smoke in the air affects plant transpiration. Maybe you could look into whether or not there is ever acid snow, we all know there is acid rain, but what about snow? You can find this out by testing the Ph level of the snow and comparing it to the Ph level of acid rain. Obviously this singular scheme only works in the winter months. There are many great topics out there for your 9th grade science project, it's just a matter of seeing one that interests you, researching and testing it out and presenting it in a professional manner.
7th Grade Science Fair project Ideas
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