Have you ever wondered why manhole covers are round? It's a good thing to know -- big companies sometimes ask that question in interviews.

Help your child get to know an elementary element with this worksheet about iron.

Help your little learner understand the concept of buoyancy with this fun worksheet. He'll decide which items will keep this frog afloat!

Engage your little scientist with a fun word search, all about sinking and floating! He'll be learning a basic concept of physical science.

Without reflective surfaces, this biker would have a much more dangerous ride. Can you find all five reflective surfaces present in this scene?

Magnets are fun to play with, but how do they actually work? Have your child circle the objects he thinks the magnet will attract.

If a ship went down, would these items sink or float? Your little one will decide, with this fun worksheet to help him hone sorting and categorizing skills.

Find out how colors work with an intro to the color spectrum. Kids will investigate the seven colors of the rainbow and do a color wheel experiment.

Searching for a worksheet that will give your kid help with his science skills? This printable will challenge his knowledge of the metric system.

Searching for help with you kid's geography skills? This printable worksheet will teach them the continent of South America.

Meet the master of compound machines: Rube Goldberg! His wacky contraptions put a whole new spin on the use of simple machines.

Boost your second grader's knowledge of space with this fun worksheet, which will have her unscrambling the answers to planetary trivia.

With this worksheet, kids read about the sport of biathlon and gain an appreciation for the skills involved by studying the math and physics behind them!

Learn about drag, air resistance, and Newton's laws with this cool worksheet on bobsled physics!

Looking for a worksheet to help with your kids science vocabulary? This printable is about science around the house.

This Thanksgiving, serve up some Thanksgiving science learning and find out all about the chemicals that make up a typical Thanksgiving meal.

Read about Alexander Graham Bell, the man who made it possible for us to stay connected all day long, in this biography that comes with a science experiment.

We all know the famous equation E = MC^2. But what does it mean? Learn a bit more about Einstein's famous energy equation with this physical science worksheet.

Have your little chemist think about the properties, or characteristics, of metals. What makes them different than non-metals?

Learn a basic concepts physical science with this fun worksheet. Your little one will decide which objects sink, and which ones float!

This science worksheet tells all about James Watt, the man that powered the Industrial Revolution.

Challenge your child's knowledge of astronomy with this space-themed worksheet, which focuses on the timing of cosmic events.

Help your child get to know his elementary elements with this handy worksheet on copper.

Guglielmo Marconi was a man who made waves in radio and sound. Learn about his life and work, then answer a short essay question in this science worksheet.

Help your child get to know the most elementary of the elements with this handy worksheet on silver.

Get to know the periodic table with this fun scavenger hunt-themed worksheet! 

Explore elements and compounds in the context of particle models and chemical formulas!

Have you ever thought about playing basketball in space? This middle-grade science worksheet discusses how forces and Newton’s Laws of Motion affect a game, both on Earth and on the moon! 

Is orange juice a solid or liquid? What about a cookie? Practice classifying everyday objects in this first- and second-grade states of matter worksheet!

Learn how manufacturers test car safety in crash tests with this informative physics worksheet!