properties

Provides an introduction to atoms and molecules; describing what they are, their structures, how they are measured, different states of matter, melting and boiling points, and the water cycle. Includes a glossary and a list of resources.

A brief description of the science of solids, liquids, and gases and how they work.

Presents an introduction to matter, in simple text with illustrations, providing information on what it is and how it behaves in the world around us.

Describes properties of the different states of matter: solid, liquid, and gas; discusses different materials, including wood and paper, glass, plastic, and cloth, as well as recycling; and includes a hands-on activity.

Explains how everything on Earth can be grouped into four states of matter and how matter can change from one state to another by applying heat or pressure. Includes related activities.

An introduction to the properties of matter, discussing solids, liquids, and gases.

Uses everyday examples, such as a baseball and a beach ball, to demonstrate the contrast between hard and soft objects.

Introduces the composition of matter, its changing states, and the effects of changing between states.