Test out the pH levels of soil in your backyard versus soil in more wild environments to solve this science case.

Examine the effect of pressure on carbonation in soda.

This science fair project idea determines which method of hand cleansing is the most effective.

Science fair project that determines whether tapping a pomegranate with a spoon helps it release its seeds.

In this science fair projects, students will grow out the bacteria that collect on air conditioner filters.

This science project challenges students to study deer behavior in their natural habitat- the feeding patterns, social behaviors, male to female ratio, etc.

Would it hurt to skip brushing your teeth just this once? Let's find out by seeing which foods produce the most mouth bacteria.

Science fair project that determines whether lettuce that is harvested gradually yields more produce than lettuce that is harvested all at once.

Throughout history, people have used song as a teaching and memory tool. This project explores whether song improves a person's ability to retain information.

In this science fair project, students will create a model of a shoreline, observe erosion and examine how jetties prevent erosion.

Science fair project which compares the rate of temperature change and the maximum temperature as a result of the angle of light radiation.

Science fair project that determines whether landscaping fabric impacts the ability of plants to receive water.

Find out whether a longer airplane will fly farther or a wider paper airplane.

This science project lets students explore the number of spots on a ladybird and how to treat ladybugs with respect.

Create a DIY Electromagnet! Using a 9v battery to create an electrical field around a nail, students explore electromagnetism in this cool science project idea.

Construct and experiment with a periscope using reflected light rays to gather an image.

This science project uses Mohsâ Hardness Test to show kids how to compare the hardness of different types of minerals.

Science fair project that examines condensation and the conditions needed in order for dew to form.

Science fair project that examines the different types of precipitation, evaluates the density of snow and calculates the ratio of snow-to-liquid.

In this project students experiment with making music using only glasses of water.

Science fair project that examines what causes thunder and why a thunderclap sounds so loud. How is lightening related to the creation of sound waves?

Do different types of oil mix or stack? Find out in this science fair project idea!

This science fair project idea explores whether a plastic slinky works as well as a metal slinky when walking it down the stairs.

Science fair project that examines the behavior of water and gravel in creek beds and the formation of sedimentary rocks.

This science fair idea examines hydrogel superabsorbent polymer crystals. They can absorb 500 times their weight in water. Can they absorb other liquids too?

This science fair project idea examines the reason boats are shaped and engineered.

This science project teaches students the relationship between compost and plant growth. Students conduct an experiment with different types of compost.

Check out this fun science fair project to make a vinegar and baking soda balloon and demonstrate how gas is created as a result of the chemical reaction.

Science fair project that examines how to grow bacteria in a controlled setting, using simple materials from around the home.

Check out this fun and easy 4th grade science fair project idea that tests how gravity induces positive and negative geotropism (gravitropism) in bean plants.