Young inventors will have a blast with this worksheet on compound machines! Use three of the six machines together to make work easier.

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

Atoms are some of the tiniest particles that make up our world. Give kids some perspective with this worksheet that shows kids just how small atoms are.

Practice using the periodic table to calculate the number of neutrons in the atom of an element.

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

That's not a lake... it's a crater! Get the scoop on some of the world's most well known craters with this space science worksheet.

Did you know there are clouds in space? They are very different than the ones on Earth! Read a bit about nebula in this space science worksheet.

The periodic table of the elements is an important classification system of the most basic particles that make up our world!

A lot of common objects use electromagnets to work. This word search will get your child thinking about all the electrical and mechanical devices around her!

Explore one of the great mysteries of the universe with this space science worksheet on black holes.

Arm your budding physicist with a free print-out version of the periodic table of the elements!

Test your knowledge of the periodic table of the elements with this quiz page!

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

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

Did you know that sound is actually caused by movement? Vibrations of particles create the sound that we hear.

What is the difference between condensation and evaporation? Learn about natural cooling and heating processes that are caused by changing states of matter!

Energy is a crucial part of physical science! All things on Earth have energy, whether it's potential or kinetic.

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

What is the difference between a solar eclipse and a lunar eclipse? Find out with this stellar space science worksheet!

In this worksheet, kids learn about friction by answering questions about the amount of friction in different situations.

This thoughtfully labeled periodic table includes information about the properties of all 103 elements.