3rd and 4th Grade Engineering and Science Inquiry Resources : Page 9

Make water and clay play a little more scientific with this hands-on experiment that teaches displacement and shows how an object's shape affects its buoyancy.

This fun and easy middle school science fair project idea explores the topic of pollution and demonstrates if polluted soil affect the growth of green plants.

Observe how your brain works while it is focused on one thing, and how it works while you are distracted by another thing.

Science fair project that examines the behavior of water and gravel in creek beds and the formation of sedimentary rocks.

This biodiversity project examines the biodiversity in your own backyard.

This science fair project focuses on a polymer called hydrogel super absorbent crystal which absorbs water, swelling to many times its original size.

Design a survival kit. Brainstorm various survival scenarios. Address basic human requirements and natural resources. Describe each tool as well uses.

This science fair project idea explores whether the process used to dry the beans we eat for food renders them unviable.

Magnets vary in strength. Have your young scientist figure out which kind of magnet is the strongest when you have him conduct this attractive experiment.

This science fair project on testing water hardness is a great introduction to practical chemistry. Test and learn the difference between hard and soft water.

Check out this cool science fair project idea that models the behavior of the cold desert plants: xerophytes and halophytes.

Find the North Star, and measure your latitude! The purpose of this science fair project is to find latitude and learn about geographic locations.

What is persistence of vision? With this hands-on science fair project idea, students will demonstrate this cool and dramatic phenomenon in their own classroom.

This science fair project investigates why the number of visible stars changes from place to place.

Science fair project that examines how to grow bacteria in a controlled setting, using simple materials from around the home.

Learn how to make a food pyramid with animals in a a coniferous forest ecosystem around your home.

Did you even wonder why some rocks are round and smooth while others are broken up into small pieces?

This science fair project idea demonstrates that plants give off water.

This science project encourages students to investigate the Mozart Effect, the idea that classical music promotes learning.

Can you increase the light and plant growth in your garden using mirrors? In this experiment, measure light reflection and find out!

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

Would your dog prefer homemade or store-bought food? Raw or cooked? Test your dog's preferred diet in this fun experiment.

Will increasing the amount of salt in water effect how slow or fast the water freezes?

Using an empty tennis ball can and a swimming pool, you will determine if it's possible to have a conversation under water.

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

This science fair project teaches kids experimental design and how to test if subjects can really sense if they are being watched.

Learn about the role of Earth's rotation on the Coriolis Effect and hurricanes in this science project. Model the Coriolis Effect on a hurricane's direction.

Saturn is the ringed planet in our solar system, a gas giant with rings made of ice and dust. Let's make a cool scale model with an old CD and some glitter!

This science project lets students explore the number of spots on a ladybird and how to treat ladybugs with respect.

In this free science fair project, build a star clock and learn how to tell time on a clear night by observing the big dipper!