Here's a thorough, easy-to-understand breakdown of the color wheel that includes primary, secondary and tertiary colors.

Grab your trusty flashlight and get ready for a scientific treasure hunt!

Light travels so quickly that sometimes we can forget it even travels at all. Learn all about the direction light travels and perform your own experiment!

Add some punch to your own doodles with a quick lesson about how to draw light and shadows.

Can you explain why your blue shirt is blue? This worksheet is full of facts about light and how it reacts with objects to give us the perception of color.

Need a colorful way to impress your friends and family? This worksheet has got you covered!

Even colors have best friends. In the world of color, these best friend pairings are called complimentary colors.

Brush up on some physics vocabulary with this energy word search!

Right now the Earth is spinning, whether we can feel it or not. Do you know why? Uncover the science behind our spinning planet with this informative worksheet.

Dr. McSquare needs help sorting out his lab reports. Can your child read each item, then label it with the correct scientific method step?

Does your little scientist know the different types of energy? Explore energy with this helpful info sheet!

Is your child baffled by the scientific method? Dr. McSquare is here to help! Learn the steps by helping the doctor organize his lab reports.

Students flex their physical science knowledge by classifying items as solids or liquids in this fourth grade states of matter worksheet.

Teach your child the difference between potential and kinetic energy with this introductory worksheet.

What is the water cycle? We're glad you asked! Learn about this amazing natural system that's been working for billions of years.

Get to know the Apollo 11 space mission in this science and history worksheet!

Who knew that the machines of the world are all made of just 6 simple machines working together? Introduce your child to simple machines with this worksheet.

Students practice classifying items as liquids or solids for a lesson on the states of matter in this fourth grade physical science worksheet.

Looking for a quick reference about gravity and a definition for kids? This two page worksheet and activity has you covered!

Introduce children to physicist Albert Einstein — and a bit of theoretical physics — with this mini biography.

Hypothesis, observation, data...with so many terms, learning the scientific method can be tricky. Learn the steps by helping Dr. McSquare sort out his reports.

Dr. McSquare is here to help kids learn the scientific method. His reports are all in disarray--can your child sort label each part with the correct step?

What is solar energy? Discover how we use the power of the sun, and complete this worksheet about an important renewable energy source.

Science can be a bit of a bore to some students, but with this quick worksheet on chemical and physical reactions, it can at least be a breeze.

Never heard of the planet Pirjute? That's because it's Jupiter, with mixed-up letters! Kids unscramble planet names on this third grade science worksheet.

Is your fourth grader learning about electricity? This worksheet is all about circuits, tests her skills and reinforces the concept of how a circuit works!

Budding scientists will learn about the density of salt water and perform an experiment with food coloring, salt water, and fresh water.

This worksheet teaches your student about physical change vs chemical change, matter, mass, and property. An exciting experiment reinforces the concepts.

Teach your little scientist the difference between physical and chemical changes, on a molecular level.

Discover some of the fascinating properties of gravity by studying one of Newton's famous laws, the Law of Gravitation.