3rd and 4th Grade Science Activities : Page 17

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

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.

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.

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.

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?

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.

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.

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.

This science experiment has students test whether a snail moves faster on concrete or dirt.

Help your own young scientist tackle the wonders of static electricity from the comfort of his own home!

Do plants breathe? Not exactly. They do respire though! This activity will help your child with see that plants are producing the oxygen we need to survive.

Tree rings can tell the age of the tree but also information about the world. This science experiment uses tree stumps to discover new facts.

Science fair project in which you will learn more about the natural world by preserving and identifying different animal tracks.

Discover whether the â5-second ruleâ is effective at determining whether food is still safe to eat after being dropped on the ground.

This science fair project idea explores whether it is easier to balance on a narrow ledge or on a rope.

This science fair project idea explores plant growth from a bulb, root, and a stem and investigates asexual plant reproduction.

Kids will make predictions about cricket behavior by conducting this fun and easy experiment which simulates different environments for crickets.