matter

Explains what density is, using examples from a birthday party--such as a room filling with people, a floating balloon, and the bubbles in a cup of soda--to illustrate the concept.

An introduction to solids, liquids, and gases that explains what they are, how they are formed, and how they are used in every life and provides simple experiments to demonstrate the differences between them and help readers understand the scientific concepts presented.

Introduces children to the various states of matter, explaining the properties of solids, liquids, and gases, how they are measured, and what role they play in everyday life.

Introduces students to mixtures and solutions, discussing matter, elements, properties, ions, compounds, alloys, colloids, and other related topics.

Discusses solid and liquid matter using pictures and simple text.

Simple text and illustrations explore what matter is and the different forms it can have.

Introduces students to the basic properties of atoms and molecules and examines the role they play in daily life.

Explains how melting and freezing changes the forms of liquid and solids, what causes melting and freezing, and how water can exist as a liquid, solid, and gas.

Introduces the properties and states of matter and explains how matter affects our daily lives.

Provides an introduction to states of matter and includes answers to twenty questions about them.