Engaging hands-on science lessons for grades 2-6 on the properties of different materials.

The heat of vaporization along with several other thermal properties are explained. Sample problems are given. Illustrations.

Investigate the properties of a strange substance which acts like a liquid and a solid. This simple experiment can be done with corn starch and water.

The definitions of transparent, translucent, and opaque can be found here. The article explains how the density of a material and its ability to absorb light determine which of these three properties it has. A list of examples is given...