Showing Results for answer key

Why doesn't the ocean freeze? Students answer this question by simulating the chemical composition and temperature of arctic waters in their own home.

Has your child ever asked you how a submarine works? Here's a simple bathtub project that will make for a hands-on answer.

Children have a naturally inquisitive mind. Foster their curiosity with a walk through an autumn field or park to answer age-old “why” questions. As you walk with your child, you can encourage them to ask questions.

Why does honey crystallize? This science fair project project answers this question and identifies the variable that makes this sweet solute crystallize faster.

How does a compass work? What's a magnetic field? Kids will build their own compass at home to find the answers in this great science fair project idea.

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

In this fun activity, your child will create their very own solar oven to bake s'mores!

In this activity, your child will transform an egg into a glowing, bouncy "ball" that they can play with.

Check out this cool science project idea to learn about rocks and explore the cycles of formation, breakdown, and reformation of rocks in the Earth's crust.

What animals are most popular? This project affords practice in data-collection, record-keeping and data-analysis through the investigation of this question.

Magic, science, or household cleanser? Let your second grader decide with this practical, nontoxic chemistry experiment with acids and bases.

Help your kindergarten science maven explore the water cycle without getting everything wet.

In this project children practice the scientific method while playing with puffy paint.

In this exciting design challenge, your child will use design thinking skills to create a mixture that can inflate a balloon.

This easy aerodynamics activity is a simple way to introduce kids to the scientific method.

Air invisible; it doesn't make sounds; you can't pick it up and throw it. So how do we know it exists? Help your second grade scientist figure it out.

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

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

Before you get ready for a delicious scramble or omelet, add a bit of science to your morning routine!

This activity provides a solution to all those leaves on your doorstep, while also giving your child a fun science lesson.

In this activity, your child will be asked to create a boat that can successfully float while holding 25 pennies.

In this 3rd grade science activity, you'll experiment with the little-known fourth state of matter: polymers! Mix borax with white glue and watch what happens.

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.

This interdisciplinary card game will have your third grader working on math facts as he travels through the solar system!

What causes sound? Here's a simple science experiment that adds a visual element to the science of sound to help kids better understand this tricky concept.

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

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

How does water pressure change with depth? Kids learn how pressure works underwater with this cool and easy demo.

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

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