Alvin Silverstein

Discusses the three kinds of symbiosis--mutualism, commensalism, and parasitism--and describes examples of these relationships.

This book explains various components of a food chain and discusses the concepts of food webs, umbrella species, biogeochemical cycles, and more.

Discusses different types of forces with examples from everyday life and the animal kingdom, covering the mechanics of simple machines, the laws of motion, gravity, how laws behave in fluids, and research done by scientists and engineers.

Provides an overview of the fundamental principles of energy and includes well-formed examples, information on how living creatures are affected by energy, and details about research on the topic.

"Explores 'yucky' things about the human body, including earwax, gas, bodily wastes, and more"--Provided by publisher.

Examines the pros and cons of keeping less common dog breeds such as akitas, chihuahuas, and Saint Bernards, discussing their care, feeding, and emotional needs.

"Discusses the science behind tornadoes, including how and where they form, the scientific methods to track and predict them, and tornado safety tips"--Provided by publisher.