3rd - 7th Grade Science Activities : Page 4

This science fair project idea determines what household items are good conductors of electricity.

Show your child how to construct a homemade thermometer. It's hands-on fun and a great way to learn about this important instrument!

This taste buds science experiment demonstrates how strongly our sense of smell controls what we taste.

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

Science fair project which teaches you about the principles of physics within a vacuum by creating a vacuum chamber.

This science fair project idea develops an understanding through experimentation of which shapes are the most structurally strong.

How greasy are your potato chips? Students will use a reliable method to quantify greasiness and compare different brands in this great science fair project.

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

Kids conduct a cool balloon rocket experiment in this fun science fair project idea. Does a greater volume of air mean a greater distance traveled?

Make some easy homemade yogurt with your young scientist, and see what a few 'live' bacteria can do in the right conditions!

Experiment about connection of senses of taste and smell. Using blindfold and noseplugs, administer blind taste test. Analyze results and organize data.

In this hands-on design challenge your child will make their very own Rube Goldberg Machine.

This science fair project idea discovers if an artificial light source will yield the same plant health and growth rates as light from the sun.

In this science experiment, do tensile strength test on fishing line, a strand of hair, a rubber band, and any other materials you're curious about!

In this science fair project, students make their own rain gauge to measure rainfall.

Kids will love making sugar crystals in this sugar crystal science fair project which teaches important chemistry concepts like saturation and solubility.

Do you love to make Jell-O? Find out in this science fair project idea if it is possible to make Jell-O with just warm water.

What's a liquid? What's a solid? What better way to experiment than by turning a childhood favorite, ice cream, into a homemade science lesson!

Brine shrimp usually live in saltwater. Investigate how salt concentration (salinity) affects the rate at which brine shrimp eggs hatch.

Why do ants like sugar? Do ants like artificial sweeteners too? Kids find out with this great inquiry-based science fair project.

This science fair project idea explores which fruit molds the fastest.

In this fun science project, learn about what happens to cut fruit and experiment with how to stop apples from turning brown.

Learn the basic structure of a DNA strand, which is the double helix, how genes form together, and the resemblance DNA has to a twisted ladder. Create a model.

This science fair project idea creates a sedimentary rock and to investigate what takes place during the rock cycle.

It's not actually that hard to get energy from garbage! Kids learn how to make biogas in the form of methane with this cool and easy science fair project idea.

Help your fifth grader execute this experiment involving a lit candle (submerged in water!) to show him the wonders of heat energy transference.

Examine whether distilled water, spring water, or regular tap water yield faster plant growth.

In this cool science fair project idea, kids conduct the ruler drop test on volunteers to determine whether reaction time can be improved with practice.

Is there a relationship between caffeine and heart rate? Students will determine the effect of caffeine on heart rate in this fun science fair project.

The goal of this evaporation experiment is to learn about how different external conditions affect drying time.