4th Grade Science Fair Projects

Chemistry
Which disinfectants are the best at destroying germs? [Project]
What kind of ice melting products work the fastest and damage plant life the least. [Project]
Determine which fabric is the best insulator. [Project]
Find out which liquid evaporates the fastest. [Project]
The effects of different chemicals on the color of different fabrics [Project]
Discover if sugar crystals grow bigger in a certain type of liquid [Project]
The effect of moisture on crystal growth [Project]
Make your own stalactite [Project]
Measure air pressure by using chemicals and corked bottles [Project]

Botany
What kind of ice melting products work the fastest and damage plant life the least. [Project]
The Effect of Acid Rain on Spider plants [Project]
Explore Endangered Species [Project]
How do different concentrations of salt water affect plants? [Project]
Will roots: hold soil together, always grow towards water, always point down? [Project]
Is there a way to prolong the life of fresh cut flowers? [Project]
What happens when a plant population is too dense? [Project]
Energy
Determine if all kinds of food waste produce the same amount of methane. [Project]
Methods of storing electrical energy [Project]
Pull a car with water power [Project]
What is the Effect of Magnification on Heat in a Solar Oven? [Project]
Is the amount of heat energy used less when there are more kids in the school? [Project]
Which drink would make a car go the fastest by putting a nitro tablet inside it [Project]

Environmmental
Practices that might reduce the amount of wastes created at school [Project]
Explore Endangered Species [Project]
The Effect of Acid Rain on Spider plants [Project]

Earth
Find different ways to prevent the damaging effects of soil erosion. [Project]
How does precipitation vary around the country? [Project]
Which planet in our solar system has the safest environment for humans to live on? [Project]

Astronomy
Which planet in our solar system has the safest environment for humans to live on? [Project]
Demonstrate what happens when a meteor hits the earth and becomes a meteorite. [Project]

Engineering
Which will bounce higher? A basketball with nitrogen in it or a basketball with oxygen in it? [Project]
Determine whether the pitch of a string can be changed by changing tension or length? [Project]
Pull a car with water power [Project]
Which drink would make a car go the fastest by putting a nitro tablet inside it [Project]

Aviation
The effects of the size and shape of a balloon rocket on its flight speed [Project]
How far paper airplanes go depending on shape, size and weight. [Project]

Health
How Certain Beverages Affect Tooth Decay [Project]
Which disinfectants are the best at destroying germs? [Project]

Biology
How did the Ancient Egyptians Mummify? [Project]

Electricity
Energy Consumption Efficiency of Different Kind of Light Bulbs [Project]
Methods of storing electrical energy [Project]

Zoology
Determine the best way to keep your dog's teeth clean and to have a "fresh" breath. [Project]
Explore Endangered Species [Project]

Psychology and Human Behavior
Think, and Change your Dreams [Project]

See also:
Elementary School (3-5) Science Fair Projects

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