3rd - 5th Grade Science Activities : Page 23

This science fair project idea recreates the movement of planetary bodies in order to learn why they sometimes appear to move backwards.

This science fair project idea explores how enzyme inhibitors, active sites, non-competitive enzyme inhibitors, and substrates work.

It's food. It's Thanksgiving tradition. And guess what: Cranberry Sauce is also science! Try our simple recipe/experiment.

What keeps a an item cooler, polymer crystals or ice? Find out in this cool science experiment!

Your child helps the environment while saving your family money in this fun and rewarding "Gas Guzzlers" competition.

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

Ever wonder why refrigerator lights turn off when you close the door? Does the darkness prevent food from spoiling? This experiment, determines just that.

Show your fourth grader how to see her heart in action. Make a simple device out of a drinking straw and clay to help her spot the movement of her pulse!

In this science fair project, we'll use a liquid crystal thermometer to find out whether exercising makes a difference in people's temperature.

This project determines the age of a tree using a growth factor chart instead of cutting the tree down to count the rings in its base.

This science fair project idea explores whether color affects a person's emotional state.

Amaze your kids by separating a salt and pepper mixture using an "electric spoon" charged with wool.

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

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.

Prove that the Earth is not flat. The objective of this science fair project is to measure the angle of the sun and calculate the circumference of the Earth.

Learn whether writing things down really makes things easier to remember.

This science fair project idea demonstrates how air resistance contributes to denser objects falling faster than less dense objects.

This study evaluates if electronic devices commonly found in most households emit radiation, and if they do, how much?

Could there be toxic chemicals lurking in the cupboards and closets of your home?

This project uses science and art to help students learn and teach others about Earth's endangered and extinct species.

Determine if gender affects the ability to identify different smells.

Explore if planting seeds in a certain direction will affect how fast it germinates.

Learn about savanna flora and fauna in this science project! Take a look at characteristics of tropical grassland plants and animals that help them survive.

Conduct a simple science experiment to see if flowers from your garden pass the acid-base indicator test with this exciting chemistry activity.

April showers may bring May flowers, but your child can preserve the beauty of spring's bounty all year long with this simple craft project!

Set off an a science adventure as you prepare a row of bee homes for your new visitors.

Find out whether putting something on top of a plant will inhibit its growth.

Here is a quick experiment you can conduct at the playground to introduce or reinforce the concept of Newton's First Law, The Law of Inertia.

This fun experiment provides a concrete and visually striking illustration of photosynthesis.

Make your own helicopter using a paper clip and a sheet of paper. Hold the spinner up in the air, let it go, and watch it spin gracefully to the ground.