2nd - 4th Grade Science Activities : Page 7

Would it hurt to skip brushing your teeth just this once? Let's find out by seeing which foods produce the most mouth bacteria.

Introduce your fourth grader to the concepts of solstices by observing the length of her shadow on the shortest day of the year, compared to other solstices.

How do you tell time without a watch? Use the sun! This simple activity will show your child how to build his own sundial.

Make a wish upon a tree with this craft that also helps your child learn more about Chinese culture.

Set your young chemist up for an afternoon of science-fueled magic with a deceptively simple activity starring baking soda and vinegar!

This science experiment tests if dog saliva can really help heal wounds.

When you rub a balloon on your head, your hair stands up; but is that true for everyone? Does hair color affect static electricity?

This simple "how to make a water wheel" activity makes physics come alive for your child by demonstrating how different kinds of energy work.

Demonstrate the properties of pressure and surface tension to explain how water can stay inside an upside down glass using cardboard.

Kids will learn how to make a steam powered rocket boat, also called a putt putt boat or a pop pop boat, in this great science fair project for 4th graders.

In this design thinking activity, your child will choose an animal to research, learn about the animal’s habitat, and then replicate the animal's habitat using household items.

In this design challenge, your child will create a parachute for a small toy using typical household items.

This is a fantastic and easy science experiment where kids will learn about elasticity by testing how high bouncy balls of different materials can bounce.

This science project uses Mohsâ Hardness Test to show kids how to compare the hardness of different types of minerals.

In this science fair project, kids observe the expansion of liquids when frozen and determine if some liquids expand more than others in the freezing process.

This science fair project idea determines the most effective method of preserving food.

This science fair project idea explores substances that cause a bubble to last longer.

The moon doesn't produce its own light, so why can we see it shining in the sky? Learn about reflection and planetshine in this fun and easy science project!

How do animals keep warm? In this experiment, find out whether fat insulation resists cold temperatures and learn how this works in the animal kingdom.

Learn how to tell time by the sun with this cool science fair project idea that tracks how the accuracy of a sundial changes over time.

The goal of this science fair experiment is to demonstrate the effects of air pressure on objects and analyze applications of air pressure principles.

Bring a little science to your third grader's Christmas as you test out his sense of smell by exposing him to common Christmas scents found in your kitchen.

Children combine an acid and an alkaline substance to simulate a volcano eruption in this fun experiment.

Put your second grade scientist to work this Fourth of July with our colorful "liquid fireworks" project!

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.

Is it possible to trick the forces of nature that make your bubbles round to create a square bubble?

Create a DIY Electromagnet! Using a 9v battery to create an electrical field around a nail, students explore electromagnetism in this cool science project idea.

In this classic Ivory soap experiment, kids learn what happens to different types of soap in the microwave, and why!

This science fair project idea determines if the size of the parachute will change the rate at which an object falls.

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.