Friction
Sally Hewitt
An introduction to friction, with key vocabulary and a story. Includes notes for parents and teachers. Suggested level: junior, primary.

by Ed Catherall (1991)
Explores the many aspects of energy, including how it is used, stored, transferred, and conserved. Includes simple projects and experiments.
Sally Hewitt
An introduction to friction, with key vocabulary and a story. Includes notes for parents and teachers. Suggested level: junior, primary.
Kendra Muntz
Complete with step-by-step illustrated instructions, you can find out the amazing science behind some of the coolest activities. A World Book Encyclopedia Company--
Robert Gardner
"Explains how to use the scientific method to conduct several science experiments about weather. Includes ideas for science fair projects"--Provided by publisher.
Betty Miles
Discusses the ecological problems of land, air, and water pollution in the world today. Includes projects that illustrate these problems and possible solutions to them.