Prager, Ellen J

Marine scientist Ellen Prager discusses a range of the unique creatures that live in the world's oceans, including arrow worms, lobsters, octopuses, the sea cucumber, the hagfish, and others, and describing the ways these creatures interact as predators, as prey, and while mating.

Illustrations and simple text teach children about volcanoes.

Illustrations and simple text teach young readers about earthquakes, what causes them, where they happen most, and what to do when one occurs.

Describes the work of oceanographers and presents stories from the author's experiences on the water, along with her colleagues and other researchers. Presents firsthand accounts of the challenges and achievements of marine scientists such as dealing with storms, avoiding dangerous marine life, and discovering the beauty of the sea.

Describes the formation of sand from materials such as coral, rock, or crystals and shows how it can be moved through water, wind, ice, and other erosion agents.

An investigation of earthquakes and volcanoes that examines what they are and why they occur; discusses tsunamis, how scientists study them, and the damage they can cause; and includes photographs and illustrations.