Sink or float? Your kid may be surprised to learn that the density of coke and diet coke aren't the same!

Learn all about light refraction by simply placing your pencil in a glass of water. Warning: your pencil may not be quiet the same afterward.

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

Track down the missing matter in this fifth-grade science worksheet!