Offers a brief introduction to space exploration, discussing key figures who have studied the universe, important discoveries from throughout history, and future possiblities.
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.
Discusses the principles of sound, how animals and human hear, the speed of sound, noise pollution, and the use of sound waves in medicine. Includes related activities.
Explores the nature and properties of light, discussing such topics as refraction, the electromagnetic spectrum, optical illusions, and photons. Includes related activities.
