Kindergarten - 7th Grade Science Activities : Page 2

The buoyant force of water explains why some objects float in water. But why do some objects sink? Find out in this physics experiment and learn about density.

What cause the phases of the moon? Make a model to see how the positions of the Sun, Moon, and Earth cause the crescent, gibbous, quarter, full, and new moon.

Tired of gum with flavor that lasts for just a couple of minute? Put gum to the test with this chewy science experiment!

Did you know your body is full of simple machines? This project looks at one of the third-class levers in the human body: your arm!

What are the effects of fertilizer on plant growth? What's the best fertilizer type (solid, liquid or powder)? Kids find out in this science fair project idea.

This experiment investigates the relationship between the temperature of a candle and its burn rate.

In this fun science fair project idea learn about universal solvents and solutes and find out the solubility of several common liquid substances.

Use chemical analysis to identify a variety of mystery powders that look the same but actually have very different properties.

This science fair project teaches about mold. Students will test different foods to see which grow mold the fastest.

Start your toy engines -- this is going to be a fast and friction-filled race!

Science fair project in which you will examine how crystals are formed by creating your own crystal using charcoal briquettes, salt, and ammonia.

Science fair project which determines whether plants are able to get enough nutrients from different types of garbage.

For this science fair project, kids will learn how to make a lemon battery. They can conduct this classic experiment using readily available materials.

Make sourdough bread...and learn some colonial history and modern science in the process!

In this cool physics experiment, use double plane mirrors at various angles to learn about light reflection. Then, see if you can solve a puzzling problem!

This project explores whether there is an effect on people, including heart rate and self-expressed mood, when they are exposed to different types of music.

What is vegetative reproduction? Find out how you can clone plants and regrow cabbage from a stem in this cool experiment!

This season is a great time to explore the many shapes, sizes, and species of evergreen trees. Download our "field guide" activity and learn more!

Sink or swim? Calculate the density of various fruits and vegetables using water and a kitchen scale.

This science fair project idea determines if the temperature of rubber effects how high it bounces.

Children will learn all about cause and effect as they experiment with potion-making in this Halloween themed activity.

Science fair project which identifies the most effective insulator that you could use to make a winter coat by comparing how well cloth and cotton trap heat.

In this activity, your child will be challenged to make a tower using paper cups.

Learn all about balance and motion as your child designs a corn maze!

Create a three-dimensional X-ray of your child's hand in this simple modeling activity. All you need to get started are black paper and drinking straws

In this exciting and empowering challenge, your child will construct a bridge using marshmallows and toothpicks!

Little scientists will make inferences about hearing loss, pitch, and frequency in this great science fair idea that puts the human ear to the test.

What are the effects of colored light on plant growth? Explore plant behavior in this cool botany science fair project and learn about phototropism!

Here's a science experiment that gives your kids a chance to see how fire needs oxygen to burn, with a little math and writing practice thrown in.

This experiment explores the question of whether age and/or gender play a role in people's ability to remember dreams.