This booklet provides background information and five experiments which focus on how energy is lost. Section I contains two experiments to help students discover how energy is lost in their homes. These experiments involve determining a home's location and the weather forces acting on it and completing a home energy audit. Section II contains two experiments designed to investigate ways to reduce energy consumption, including investigating how electricity can be used more wisely and building and weatherizing a model house. Section III contains an experiment in which the weatherized model house is converted into a solar garden that can be used to grow small plants (such as potted herbs) outside during the winter. All but the first experiment contain one or more related, "quickie" experiments (such as making a draft detector using a pencil and piece of paper). All experiments include lists of materials required and procedures used. (JN)