This book introduces students to the things that humans need to live: food, shelter, water, and air. With images that are easy to identify and clear, simple sen

Introduces the importance of water to all life on earth.

Defines the characteristics and needs of living things, such as plants and animals.

The Principles of Biology sequence (BI 211, 212 and 213) introduces biology as a scientific discipline for students planning to major in biology and other scien

This science series looks at what living things need to stay alive. Each title looks at one of the basic elements of life and considers what it is, which things