These science fair projects for 7th grade are perfect for allowing older kids to explore more advanced scientific concepts, like electrolysis and electroplating.
1. Copper Plated Coins
Use some household materials to plate your coins with copper! You can also try copper plating designs onto your coins!
Electrolysis is a way to dissolve bits of metal into acidic liquids like vinegar. When you run electricity through vinegar, the vinegar helps to carry electricity from one side of the circuit to the other. Electroplating is a way to put those little bits of copper onto something else. With just a little electricity, you can use electrolysis and electroplating to plate a quarter with copper. Does that make it look like a penny to you?
2. Splitting Water
Did you know that water is actually a chemical? That’s why we call it H2O–water is made up of the chemical elements, hydrogen and oxygen! What would water look like if you could split water into its two parts? Try out this experiment to find out!
When you hook up the wires, electricity flows in a loop from the battery, down one of the pencils, through the water, then up the other pencil and back to the battery. The electricity actually breaks the water molecules apart into it parts — hydrogen and oxygen! The bubbles you see on the tips of the pencils are the hydrogen and oxygen gas created by this reaction. In fact, hydrogen gas is created at one of the pencils, and oxygen gas is created at the other. This process is called water electrolysis.
3. Paper Airplane Launcher
Take your paper airplanes to new heights by making a motorized launcher for them.
Paper airplanes work just like regular passenger planes and fighter jets: by redirecting air to keep themselves airborne. As long as a plane is moving quickly, its wings will redirect a lot of air downwards, which generates an equal upwards force (lift). This lift is enough to bear the weight of the plane against the pull of gravity. Your paper airplane launcher is effective because it gives the paper airplanes a lot of speed, and therefore a lot of lift — plenty to keep the planes aloft for lengthy trips around a room (or until they hit something!)
4. Rubber Band Helicopter
Learn about helicopters by making a rubber band powered flying toy!
The two propellers on your rubber band helicopter are able to fly thanks to the same principles that keep real helicopters aloft. The angled blades of the propellers act like fans when they spin, pulling air from above and blowing the air downwards. This creates enough lift to counter the effect of gravity on the helicopter, pushing it higher and higher into the sky. If you set up your propellers correctly, with opposite blade orientations for each propeller, they should both blow air in the same direction, even though they are spinning in opposite directions… double the propellers means double the lift, and double the flying power!
5. Fizzy Candy Balloon
Harness the power of fizzy candy and soda to inflate a balloon without blowing! This experiment can be repeated many times with different sodas to see how each reacts differently and which creates the biggest balloon.
The fizzy candy that we used was made by mixing up warm, sugary syrup with carbon dioxide gas. As the syrup cooled and hardened into small balls of candy, it trapped little bubbles of carbon dioxide inside. Now, when the candy comes in contact with liquid (in this case the soda), the sugar in the candy dissolves away, and the bubbles of carbon dioxide gas escape and fill up the balloon.
For more amazing science fair projects, be sure to check out:
HELLLLLOOOOOO I’m new I really like the ideas but where do you get the materials from?
These are very smart and creative, but I need to do something that is not messy.
Same here :'(
The Paper Airplane Launcher doesn’t look messy. Why don’t you try that?
Best projects in the world!
Thank You for those ideas. They really did help.I love science, and now I have 10 other ideas not from this website using some of these ideas with others to make an even better experiment.Thanks again.
Thank you for all of the ideas for my very first science fair project… 😉
Thank you for all of the project ideas for my first SouthEastern MIddle School ( 7th ) science fair project ideas… Thank you !!!!!!! : )
I will do the fizzy balloon project because it looks cool and I think it will get me a good grade in science.
Science made fun…👍🏻👍🏻👍🏻❤
there is really good ideas here mabey ill try some
I would like to do projects 1 and 2
Yea me too I want to also try the fizzy bottle one maybe I will get a good grade.
There is way more science projects than just this
This is a really good site to go to for science fair ideas.
Can you please give me a science project based on electricity
These project ideas are cool and all but they seem childish for a seventh grader.
Are there any science projects on hair/hair products?
thank youuuuuu
i appreciate these fun and fresh ideas!!!!!!
I need a more science topic for 7th grade that is a good experiment.
this website I amazing for what it I made for, this is made for kids who want to do an amazing science fair project.
These are very fascinating! There are a lot of good ideas, for grade 7’s thanks for giving me great ideas
nice projects.
lovely ideas for experiments but too less variety.and the video shown above should be complete not repeated.
good job
Do you have year 8 & 9 science projects
Please make sure that they work
Very good information . I finished my holiday homework with the help of this web site.
I love science!
Nice
they were cool but it needs to be no comparesons but with data
thanks
i need a project right now!! it needs to be measurable
Cool
Thank You really useful stuff
awesome website
i think ts really awesome i wanna join
It is ok but I think some of them are more for 3rd grade
interesting
What easy engineering project should I do in 7th grade
I think the candy bouillon is a very interesting idea
can u show more easy 7 grade science fair project
this really helped me for my stem fair
you need more science projects and they were great : )
None of these are really good for a science project.
Very helpful, thank you for making this!
nice ideaskskskskks
best projects ever !!!!!!!!!!!!!!!!!!
i love these projects !!!!!!!!!!!!!!!!!!
I LOVE SCIENCE!!!!!!!!!!! Don’t you?
The great land of the Dollar Store!
These projects r actually pretty nice but I need smth w/ more engineering.
Anything in mind??
]_(@^@)_[
Hi not loving the ideas sorry 😥
Very nice
😀😀😀♥️♥️♥️
I like the RubberBand helicopter
yea i need to know that too
There are a lot of ideas but seventh graders are looking for things that will make them win the fair which means stuff that shows that they are trying to solve modern problems
none of these projects have an independent variable.
look its peppa pig
Thank You great ideas
WHERE ARE THE MATERIALS AND CAN´T THE VIDEOS BE MORE DESCRIPTIVE!!!!😬😕OKAY.👍👍
I have never tried one but I think it would be nice to try.
Thanks for the ideas we like the fizzy balloon one it looks yum too 😛
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Thanks for these ideas, do u have any easier science fair projects that have to do with earth, or astronomy that get you quantitave results that are specific and easy to write about in a response over 2-3 pages of google doc work? If so, pls share