Seventh Grade Physics Science Projects (30 results)

Physics is the study of matter — what is it made of? How does it behave? What laws or equations describe it? From subatomic particles, to the Big Bang, modern physicists study matter at a tremendous range of scales. There's a whole lot of interesting physics at the human scale, too. If physics interests you our wide collection of physics projects is sure to have an experiment that excites you.

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Science Fair Project Idea
What can you do with magnets and ball bearings that makes a lot of noise? Why, build a magnetic linear accelerator, called a Gauss rifle, of course! Now, this magnetic accelerator is not a weapon, but a way for you to learn a lot more about physics concepts, like momentum. In this physics science project, you will investigate how far a ball bearing launched by a Gauss rifle will fly, depending on how many magnetic acceleration stages are in the setup and the ball bearing's initial velocity.… Read more
Phys_p081
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Time Required Very Short (≤ 1 day)
Prerequisites None
Material Availability For your convenience a kit is available for this project from our partner .
Cost Low ($20 - $50)
Safety A Gauss rifle (also called a magnetic linear accelerator) is not a weapon. It can however, launch metal balls at high speeds. Do not aim the device at anyone or anything. Do not put your hand in front of the projectiles. Read and follow closely the important safety notes at the beginning of the Experimental Procedure before you begin.
Science Fair Project Idea
You may have seen movies or read books where armies in medieval times catapulted large rocks or other objects at castles (or each other!). These armies used different types of catapults to accomplish different goals — for example, launching things over or into castle walls to knock them down. In this experiment, you will use a ping-pong ball catapult to lay siege to a "castle" and find the right settings to hit your targets. Read more
Phys_p085
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Time Required Very Short (≤ 1 day)
Prerequisites None
Material Availability A kit is available from our partner . See the Materials tab for details.
Cost Low ($20 - $50)
Safety Minor injury possible. Keep your fingers clear when launching the catapult. Do not aim the catapult at people.
Science Fair Project Idea
Have you ever wondered why a water strider can walk on water? Or how detergent can clean your dishes? If you observe carefully, you can find dozens of similarly interesting phenomena that are all linked to the surface tension of water. In this science project, you will investigate the properties of water surface tension. Read more
Phys_p010
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Time Required Short (2-5 days)
Prerequisites None
Material Availability Readily available
Cost Very Low (under $20)
Safety No issues.
Science Fair Project Idea
Can you hear me now . . . ? Just how loud does a sound have to be for us to hear it? And how loud is too loud for our ears? Learn to measure levels of sound in this project, and discover the amazing auditory range your ears can detect in the noisy world around you. If you have a smartphone handy, you can even do this project without purchasing any additional materials, by using Google's Science Journal app. Read more
Phys_p034
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Time Required Average (6-10 days)
Prerequisites None
Material Availability Readily available
Cost Very Low (under $20)
Safety Do not try to measure very loud noises (lawnmowers, chainsaws, concerts, etc.) for this project unless you wear ear protection.
Science Fair Project Idea
Every criminal leaves behind evidence at the crime scene. The trick to catching the criminal is collecting all of the evidence and making sense of it. This is what the forensic expert does. In this science project you will be correlating the size of blood stains to the distance they fell, but do not get too grossed out. You will be doing it with fake blood. If you like figuring out mysteries, this is the science project for you! Read more
Phys_p066
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Time Required Very Short (≤ 1 day)
Prerequisites None
Material Availability Readily available.
Cost Low ($20 - $50)
Safety This topic can be a little scary. If you are squeamish, you may want to choose another topic. Adult supervision is required when doing background research, especially online, on this topic.
Science Fair Project Idea
Do you like winter sports like sledding or skiing? Check out this winter-themed engineering project to build your own miniature "ski lift." Use it to transport small objects from one place to another, just like a real ski lift transports skiers from the bottom of a mountain to the top. Read more
Phys_p100
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- Less Details
Time Required Short (2-5 days)
Prerequisites None
Material Availability Readily available
Cost Very Low (under $20)
Safety No issues
Science Fair Project Idea
Imagine that you are a detective investigating a murder. You have a body that was found in a swimming pool, and someone reported hearing an argument near the pool at 10:00 PM the night before. Your first question might be "Was this person killed around 10:00 PM last night, or at some other time?" One way to answer this question is to measure the internal temperature of the body. The longer ago the killing occurred, the colder the body. But can you assign a specific time of death to a specific… Read more
Phys_p079
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Time Required Short (2-5 days)
Prerequisites None
Material Availability Readily available
Cost Very Low (under $20)
Safety No issues
Science Fair Project Idea
What do sand and cereal have in common? They are both granular materials, which means they are made up of solid particles, but they can actually flow like liquid. When two granular materials with very different-sized particles are mixed, you can actually separate each type by putting them in a rotating device called a tumbler. In this science project, you will examine how common household granular materials behave when mixed together in a moving container Read more
Phys_p092
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- Less Details
Time Required Short (2-5 days)
Prerequisites None
Material Availability Readily available
Cost Very Low (under $20)
Safety Adult supervision is recommended when using a knife to cut a hole in the cardboard box
Science Fair Project Idea
What does it take to launch a satellite to explore Mars, or a mission to the moon? This project has several possible variations for exploring the physics of rockets. This is rocket science! Read more
Phys_p008
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Time Required Long (2-4 weeks)
Material Availability Readily available
Cost Average ($50 - $100)
Safety Must follow the .
Science Fair Project Idea
Can water remain liquid below its normal freezing point? If it does, that water is supercool(-ed). This project shows you a method for supercooling water. You can test water from different sources to see whether or not it can be supercooled. Read more
Phys_p033
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- Less Details
Time Required Short (2-5 days)
Prerequisites None
Material Availability Readily available. Project will take longer if you have to order and ship a thermometer.
Cost Low ($20 - $50)
Safety No issues
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