Encourage your child to compare and contrast a wide variety of autumn-themed items by weighing various objects and recording their findings.

Determine whether fresh vegetables have more calories or less calories than canned vegetables.

Will your liquid weigh less once you remove the fat from it? Find out in this science fair project idea.

This science fair project idea explores whether boiling and freezing water will have an effect on how much it weighs.

This project tests the hypothesis that dark colors absorb more heat than light colors.

Determine if âdouble dippingâ chips really spreads more germs than dipping only once per chip.

Is there more air particulate matter in an urban or rural environment? Test your knowledge with this science fair project.

Find out whether freezing or refrigerating destroys more bacteria. This is essential to consuming safe and germ-free food.

This science fair project idea examines reptile behavior and to determine whether reptiles are more active during warmer temperatures.

This science fair project idea determines whether land or water warms more quickly and investigates how solar radiation increases the temperature of surfaces.

The objective of this science fair project idea is to determine whether frozen vegetables have more nutrients than canned vegetables.

Most people assume that cold water freezes more quickly, but could that be false? Does hot water freeze faster than cold water? Let's find out!

Check out is fun science fair project idea to learn about heat transfer and why certain insulating materials are more practical than others.

Determine whether magic salt is more effective at melting snow than regular salt. Pour one ounce of salt over the ice cubes, compare the melt downs.

Give your second grader a chance to get his feet wet with measurement before he moves onto the more complicated stuff by trying this activity with him at home.

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

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

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

Check out this cool science fair project idea to explore the relation between onions and eyes and how to prevent eyes from tearing while cutting an onion.

A fun activity for a hot day, this will give young kids a chance to experiment with beginning science and math â and splash around in the process!

This measurement activity uses feet to compare objects, but not the ones found on rulers and measuring sticks...the feet on your child's own body!

In this cool experiment, learn about the forces of resistance in a liquid and race marbles in a cylinder to find out which fluids have a high viscosity.

In this science fair project, students will use methylene blue to study the presence of aerobic bacteria in milk.

This project determines whether Styrofoam, paper, or plastic cups are best for preventing ice from melting.

What is the coldest temperature possible? In this cool experiment, you'll calculate absolute zero by extrapolating data on the temperature and volume of gas.

Why doesn't the ocean freeze? Students answer this question by simulating the chemical composition and temperature of arctic waters in their own home.

Science fair project that measure winds speed, temperature, and time of day in order to determine the origins of the wind.

Try this simple activity with your child to guesstimate the age of a tree in your yard and nurture her developing math skills while you're at it!

Look for a correlation between temperature and the intensity of cricket chirping. Measure ambient temperature and sound intensity in decibels.

How powerful is the reaction between baking soda and vinegar? Find out here!