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Showing Results for practice three digit and regrouping : Page 6

How powerful is the reaction between baking soda and vinegar? Find out here!

Baking Soda and Vinegar Balloon

Learn how to make an anemometer with step-by-step instructions in this cool science fair project idea for 4th grade.

How to Make an Anemometer

In this science fair project, students create their own miniature salt flats at home.

Create Your Own Miniature Salt Flats!

This science fair project examines how seeds hitchhike on animals and clothing.

How Do Seeds Hitchhike?

In this science fair projects, students will grow out the bacteria that collect on air conditioner filters.

What Lives in the Air Conditioner?

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

The Psychology of Feeling Watched

In this project, learn about animal vision and different kinds of eyes: ocelli, compound eyes, and camera eyes. Find out what a jellyfish or grasshopper sees!

Animal Vision: Ocelli, Compound Eyes, and Camera Eyes

The possibilities are endless with this fun Halloween-themed STEM activity! With simple supplies, your child will experiment, adapt, and use their creativity while they build structures using different specifications.

Halloween STEM Building Challenge

In this science fair project, apply the principles of leverage and force by building six simple machines designed to set weights in motion.

Simple Machines

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

Water Salinity

Science fair project that examines condensation and the conditions needed in order for dew to form.

Dew Point, Humidity and Weather

Free science fair project idea that examines the differences between cats and dogs. Analyze objective qualities rather than subjective ones.

Cats & Dogs

Ever wondered how a plant drinks water? This science project will teach you how and help you create a beautiful floral display!

How do Plants Absorb Water?

The objective of this science fair project is to examine the basic principles of air pressure using simple materials like a balloon, straw and string.

Principles of Air Pressure

In this outdoor science activity you'll find tips on how to create a nature journal by choosing a native plant or animal and tracking that species.

Everyday Darwin: Create a Nature Journal

Certain fruits can change gelatinâs ability to set. In this experiment, kids will discover what happens when gelatin meets pineapple enzyme.

Pineapple Enzyme

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

Can New Plants Be Made Without Seeds?

This science fair project idea investigates the ability of different whitening toothpastes to whiten teeth.

Smile!

This science fair project idea investigates if fats add to the flavor of food.

Low Fat, Low Taste?

This science fair project investigates whether tapping the top or the side of the can will stop a vigorously-shaken can of soda from exploding.

How to Stop Soda From Exploding

This science fair project teaches students about wilting and browning of salad greens.

Why Do Greens Turn Brown?

Kids discover what a homogeneous mixture is by adding sugar to distilled water and identify the various factors affecting solubility.

Factors Affecting Solubility

Have your child kick off their summer vacation by making a miniature water slide!

Design Challenge: Making a Water Slide

Collect meteorite dust with a magnet in your very own backyard!  The objective of this science fair project is to gather meteorite dust to study outer space.

Outer Space In My Yard

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.

Testing Water Hardness

This science fair project idea investigates how a bottom keel helps keep a boat from rocking back and forth.

Don't Rock the Boat

This science fair project idea explores how the shape of a boat affects its density and how much weight it can float.

Whatever Floats Your Boat

This science fair project idea examines whether plants are still able to grow normally if they are turned upside-down.

Upside-Down Plants

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

Periscope Construction

Science fair project idea which teaches you how to make butter by separating cream into butter and buttermilk.

Homemade Butter

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