Ballard, Carol

Explores technologies and strategies for sustainable living in the early twenty-first century, with a focus on farming, discussing environmental problems, globalization, meeting people's needs, and other related topics.

Explores the properties of one's pulse and discusses how the heart circulates blood throughout the body. Examines why one's pulse increases when one is active and includes full-color photographs, a glossary, and further reading sources.

An overview of light that describes where it comes from, how it travels, shadows, reflections, mirrors, rainbows, and colors; and discusses times of day and how the eye works. Includes related activities, a glossary, and a list of resources.

Describes in simple language and with many illustrations threats to the environment and ways of alleviating those threats.

Helps children understand why they might need glasses, explaining how the eyes work, what common vision problems are, and how they can keep their eyes healthy.

An exploration of heating and cooling that covers temperature, changes of state, conduction, convection, heat radiation, and storing and saving heat.

Explains why strong family and friendship relationships are important and presents guidance for keeping them healthy, covering such topics as peer pressure, bullying, gangs, family changes, and grief and providing tips for difficult situations such as arguments or feeling left out.

Presents a guide to understanding the properties and uses or water, and discusses the importance of water for people and the environment.

Experiments and activities help students learn how the human body stays fit, describing how the muscles, heart, sweat glands, and other systems work together to help people stay healthy.

Describes different types of organ transplants and the issues related to each type. Covers the history of and procedures for organ transplants. Discusses how doctors select donors and recipients and examines research on artificial organs.