Construct calorimeter and determine the caloric value of a sample of foods by change in temperature for each of the foods.

Study the effects of wind and temperature on evaporation. Place wet sponges in different environments, check at regular intervals, track time required to dry.

Determine whether a hot liquid cools off faster when liquid is added before or after a two minute wait.

Did you ever drink spoiled milk? Find out whether whole milk spoils at the same rate as 2% and skim milk.

Bake some cookies with an oven that collects sunlight and traps the shorter wavelengths (heat!).

Explore how you can achieve magnetic levitation with the Meissner Effect! This cool science project explains formation and applications of a superconductor.

This fun science fair project idea explains what a circadian rhythm is and explores the types of biological activities that follow a 24 hour cycle in mammals.

Science fair project that creates fog using bottles of hot and cold water.

Grow a garden with an environmentally-friendly twist by using plant scraps that usually get thrown away.

Evaluate whether people can raise the temperature of their finger using the power of their thoughts.

Got a kid who loves fashion? Help her develop her own unique style with this tie-dye project using natural dyes.

Science fair project in which you will examine how crystals are formed by creating your own crystal using charcoal briquettes, salt, and ammonia.

Measure temperature change over time using a variety of insulation materials. Be creative with insulation materials: scarves, yarn, socks, feathers, oil, etc

This science fair project idea determines what factors influence an individual's reaction time using a web-based timed reaction test.

Check out this cool science fair project idea to explore non-chemical means of preserving fruits by using thermotherapy.

Science fair project that determines how UV radiation emitted by the sun varies depending on the time of day, using a handheld UV detector

Here's a fun at-home activity that will help your child strengthen math skills using high and low temperature data, and become a master temperature tracker!

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

Test products which claim to reduce wrinkles, and determine which is the most effective. Test effectiveness over three weeks, using a sample of volunteers.

How does frost form? How fast does it form? Do this simple science project using a plastic glass, rock salt and some water to learn about deposition.

Which public places harbor the most bacteria and germs? Test different environments to find out where the most bacteria live in this science project.

This science fair project idea quantifies exactly how accurate the cricket thermometer is.

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.

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

Save money by making compost! Use this science fair project idea to determine which composting methods best encourage decomposition of organic matter.

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

Science fair project that uses distillation to convert salt water into fresh water.

Ethanol can be used as an alternative fuel! The purpose of this experiment is to identify a starch plant that produces the largest quantity of ethanol.

Use playing cards to learn about temperature as well as positive and negative integers in this fourth grade math game.

Your third grader will be amazed at the explosive combination of vinegar and baking soda in these chocolate volcano cupcakes with white chocolate "lava."