Every four years something funny happens with our calendars -- we add a day! Why do we do this? Discover the science behind leap year.

Learn some basic chemistry with this worksheet about the universal solvent: water. Find out why water is called the universal solvent.

Get charged up about static electricity with this informative fourth- and fifth-grade worksheet!

This worksheet teaches your child about physical properties of water, specific heat, kinetic energy and more.

Did you know that light could bounce? Set up a light obstacle course with a few mirrors and watch light bounce around your room.

With two simple yet fun experiments, this worksheet covers the interesting topic of cohesion and adhesion of water.

Introduce your flashlight to mirrors. Mirrors are cool surfaces that reflect light just as well as they reflect your face.

Children learn the fascinating physics behind lightning, along with a few fun facts, in this physical science worksheet.