Pettigrew, Mark

Photographs, illustrations, and text describe what radiation is and explain the different types of radiation.

Photographs, diagrams, and text explain what causes the weather, the seasons, and how to predict the weather.

Photographs, illustrations, and text describe what radiation is and explain the different types of radiation.

Introduces the various aspects of sound, what it is, how it is made, and how it is detected by the ear.

Examines how sounds are made and heard, what makes each sound different, how sound travel, the speed of sound and the sound barrier, echoes and acoustics, and the sounds of musical instruments.

Presents an introduction to the Earth, discussing its origin, geographical features, oceans, rotation, climate, and atmosphere, and including a related activity.

Traces the history of the Earth, how movements in its surface produce mountains, earthquakes, and volcanoes, and what causes the seasons, tides, and patterns of night and day.