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Fourth Grade Physics Science Projects (16 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
Did you know that the most likely time to be struck and killed by a car in the United States is at dusk, dawn, or at night? In 2014, 3 out of every 4 pedestrian fatalities happened in these types of poor light conditions. Is there something you could do to decrease the chances you, your friends, and your family members are safer when walking or biking at night? Do you think the types of clothes that you wear could make a difference in how visible you are to drivers? Explore the science of… Read more
Phys_p104
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Time Required Short (2-5 days)
Prerequisites None
Material Availability Readily available
Cost Low ($20 - $50)
Safety Adult supervision is required when performing the test after dark.
Science Fair Project Idea
Practice makes you better at most things, and knowledge makes practice so much easier! Can you swirl a circular toy called a hula hoop around your waist or arm? Is it hard? What knowledge can you apply to find ways that make hula-hooping easier? Physics! Yes, physics will help you determine what makes one hula hoop a winner and another a flop. In this project, you will create your own hula hoops, spin them, and draw conclusions. The road will then be open to your becoming a hula hoop expert. If… Read more
Phys_p088
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Time Required Short (2-5 days)
Prerequisites You should know how to (or be willing to learn to) hula hoop around your waist or arm. Note: Hula-hooping is fairly easy if you have the right hula hoop for your body. This science project provides guidelines to make such a hula hoop.
Material Availability Readily available.
Cost Average ($40 - $80)
Safety Adult help is required to cut the tubing to make your own hula hoop.
Science Fair Project Idea
Did you know that sunlight can actually be separated into the colors of the rainbow? And the light of different colors can be added together to make white light or new colors. This is an area of study where art and science overlap. In this science fair project, you will explore this area by drawing or painting "pie slices" onto a white circle and then combining them to make a new color by spinning the wheel using an electric drill. Read more
Phys_p076
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Time Required Very Short (≤ 1 day)
Prerequisites None
Material Availability You will need a cordless electric drill and a sanding disk for this science fair project.
Cost Average ($50 - $100)
Safety Adult supervision is required, particularly to help with the power tools. Always wear safety goggles when working with power tools.
Science Fair Project Idea
Did you know that you can use magnets to build a train that floats above its tracks? In this project, you will also use magnets to make the train stop, preventing it from crashing into the end of the track. Will adding more magnets help the train stop sooner? Read more
Phys_p105
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Time Required Very Short (≤ 1 day)
Prerequisites Attention to detail and patience are needed for this project. After building, you will need to make adjustments to get it working perfectly. The train floats above the tracks well once everything is lined up carefully.
Material Availability Specialty materials required. See Materials section.
Cost Low ($20 - $50)
Safety Keep magnets away from small children and pets who might swallow them.
Science Fair Project Idea
Standing on a balcony near the top of the Tower of Pisa in Italy, a young scientist dropped two balls into the crowd below. The scientist, young Galileo, was not trying to knock his fellow professors on the head, but was trying to prove his theory that all objects fall to earth at the same rate, regardless of their mass. Was Galileo's theory correct? In this science project, you will get to test it out for yourself! Look out below! Read more
Phys_p015
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Time Required Very Short (≤ 1 day)
Prerequisites Basic understanding of gravity
Material Availability Readily available
Cost Very Low (under $20)
Safety Adult supervision required when using ladder
Science Fair Project Idea
Try your hand at this engineering challenge. Can you build a "launcher" device to launch a ball as far as possible and a "receiver" to catch it? Building a receiver provides an extra twist to a traditional catapult project. Add to the challenge by using a limited set of materials to build your machine and calculate a score based on your throw distance and materials used. Read more
ApMech_p052
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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
Do you think you could build a car powered by nothing but air? A balloon-powered car is pushed forward by air escaping from a balloon, and it is fun and easy to build with materials you already have around your house. Can you imagine how you would want your own balloon-powered car to look? Can you design a car that will travel as far as possible? You can even measure your car's speed using your smartphone and Google's app. Get ready to grab some simple supplies to bring your idea to life! Read more
Phys_p099
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Time Required Short (2-5 days)
Prerequisites None
Material Availability Readily available
Cost Very Low (under $20)
Safety Cutting some materials, like plastic bottles, can create sharp edges. Young children should have supervision when using scissors or hobby knives.
Science Fair Project Idea
3... 2... 1... 0— blastoff! In this science project, you will use a bottle rocket launcher to launch your own bottle rocket. You will load it with water and pressurized air, make several launches, and find out what makes your rocket soar the highest. Read more
Phys_p096
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Time Required Average (6-10 days)
Prerequisites None
Material Availability Readily available
Cost Average ($40 - $80)
Safety Adult supervision is required at all times. See the safety note at the beginning of the Procedure for details.
Science Fair Project Idea
Have you ever wondered what sounds you can hear in space? The answer is simple: none! In outer space there is utter silence. There are no sounds of traffic jams or thunderstorms or crashing waves. No buzzing bees or babies crying. Just silence. In this experiment, you will discover why empty space is void of sound and prove it with the help of Google's app. Read more
Phys_p017
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Time Required Very Short (≤ 1 day)
Material Availability Readily available
Cost Low ($20 - $50)
Safety Use adult supervision when using the stove. To prevent burning yourself, always protect your hands when touching the hot flask and make sure to avoid direct contact with hot surfaces and liquids. Be especially careful when closing the flask with the stopper as it might pop out again.
Science Fair Project Idea
Ever wonder why it is harder to keep your balance with a heavy backpack on? Or why it is difficult to make a toddler's sippy cup tip over? Maybe you are the kind of person who wonders about circus balancing acts and would like to learn how to ride a bike on a rope. Or perhaps you want to know how to make your toy car less prone to toppling over when racing through a sharp curve. In this science project you can learn about balance using marshmallows, skewers, and toothpicks. Sticky, yummy… Read more
Phys_p084
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- Less Details
Time Required Very Short (≤ 1 day)
Prerequisites None
Material Availability Readily available
Cost Very Low (under $20)
Safety No issues
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