Study how liquids separate into layers by creating a liquid gradient, different density liquids separate into layers in a graduated cylinder.

Demonstrate the relationship between mass, volume and density. Measure displaced water, and weigh object to calculate mass and density.

This is a quick, easy science fair project that conveys the idea of density to preschool and early elementary children.

This science fair project idea compares the mass and density of objects.

Sink or swim? Calculate the density of various fruits and vegetables using water and a kitchen scale.

In this science fair project, we learn how air molecules move as a result of density, convection, and air currents.

Check out this fun science fair project idea for middle school students to learn about the effects of temperature on the density of a gas such as air.

Determine how salinity affects the circulation of warm and cold water. Note whether the warm water mixes or forms a layer with cold water.

Science fair project that examines how temperature affects density and how density in turn affects the behavior of helium gas.

This experiment determines the distribution of darts around a bulls eye to simulate the probability of an electron's location in its own cloud of electrons.

Science fair project which will teach you more about the foods that you eat, and learn which ones are healthier choices.

Measure the densities of various fruits and vegetables to determine if there is a relationship between density and nutritional value.

Science fair project that helps you better understand density by comparing the relative densities of cans of Coke and Diet Coke.

Science fair project that determines the correlation between the ability of selected materials to conduct heat and a material's density.

This science fair project idea explores how the shape of a boat affects its density and how much weight it can float.

The objective of this science fair project is to analyze the effects of salinity and temperature on water.

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

This cool science fair project teaches kids about temperature, density and buoyancy using balloons that float with normal air. No helium required!

Science fair project which simulates the global conveyor belts on a small scale, and observes the effects of wind, density and temperature on water movement.

The buoyant force of water explains why some objects float in water. But why do some objects sink? Find out in this physics experiment and learn about density.

Kids will learn how to make a thermometer to to explore liquid density in this great science fair project. Which liquids are affected by temperature the most?

In this popcorn experiment, students can explore how two things made out of the same material can have very different appearances and densities.

In this science fair project, students test how objects float and sink in liquids of different densities.

In this cool experiment, learn how to find specific gravity of minerals using liquids of different densities to see which substances and items sink and float.

In this science fair project, young children discover what happens when two fluids that have different densities get together.

This science fair project idea investigates which objects float and sink in honey, water, and oil.

Before you get ready for a delicious scramble or omelet, add a bit of science to your morning routine!

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

Demonstrate how to tell the age of an egg without having to crack it open.

The objective of this science project is to investigate why NASA has been using aerogel for the Stardust Project for collecting gas and dust from comets.